// === ENGLISH PAST TENSE AND TRAVEL STORY ===
// Complete English story with Chinese translation and pronunciation

window.ContentModules = window.ContentModules || {};

window.ContentModules.NCE2Lesson3 = {
    id: "nce2-lesson3",
    name: "NCE2-Lesson3 - Please Send Me a Card",
    description: "English learning story focusing on past tense verbs and travel vocabulary",
    difficulty: "intermediate",
    language: "en-US",
    userLanguage: "zh-CN",
    totalWords: 180,

    // === GRAMMAR LESSONS SYSTEM ===
    grammar: {
        "past-tense-verbs": {
            title: "Past Tense Verbs - 过去时动词",
            explanation: "English uses past tense verbs to talk about things that happened before now.",
            rules: [
                "Regular verbs add -ed: visit → visited, pass → passed",
                "Irregular verbs change form: go → went, think → thought", 
                "Past tense is the same for all persons: I went, he went, they went",
                "Use past tense for completed actions in the past"
            ],
            examples: [
                {
                    english: "I went to Italy last summer.",
                    chinese: "去年夏天我去了意大利。",
                    explanation: "Use past tense for completed actions with time expressions",
                    pronunciation: "aɪ went tuː ˈɪtəli læst ˈsʌmər"
                },
                {
                    english: "I visited museums and sat in gardens.",
                    chinese: "我参观了博物馆，坐在花园里。",
                    explanation: "Multiple past actions can be connected with 'and'",
                    pronunciation: "aɪ ˈvɪzɪtɪd mjuːˈziːəmz ænd sæt ɪn ˈɡɑːrdənz"
                },
                {
                    english: "A waiter taught me Italian words.",
                    chinese: "一个服务员教了我意大利语单词。",
                    explanation: "Irregular past tense: teach → taught",
                    pronunciation: "ə ˈweɪtər tɔːt miː ɪˈtæljən wɜːrdz"
                },
                {
                    english: "I did not understand a word.",
                    chinese: "我一个词都不懂。",
                    explanation: "Negative past tense uses 'did not' + base verb",
                    pronunciation: "aɪ dɪd nɑːt ˌʌndərˈstænd ə wɜːrd"
                },
                {
                    english: "He lent me a book.",
                    chinese: "他借给我一本书。",
                    explanation: "Irregular past tense: lend → lent",
                    pronunciation: "hiː lent miː ə bʊk"
                },
                {
                    english: "I bought thirty-seven cards.",
                    chinese: "我买了三十七张卡片。",
                    explanation: "Irregular past tense: buy → bought",
                    pronunciation: "aɪ bɔːt ˈθɜːrti ˈsevən kɑːrdz"
                },
                {
                    english: "I spent the whole day in my room.",
                    chinese: "我在房间里待了一整天。",
                    explanation: "Irregular past tense: spend → spent",
                    pronunciation: "aɪ spent ðə hoʊl deɪ ɪn maɪ ruːm"
                },
                {
                    english: "I thought about postcards every day.",
                    chinese: "我每天都想着明信片。",
                    explanation: "Irregular past tense: think → thought",
                    pronunciation: "aɪ θɔːt əˈbaʊt ˈpoʊstkɑːrdz ˈevri deɪ"
                }
            ],
            exercises: [
                {
                    type: "fill_blank",
                    sentence: "Last summer, I _____ to Italy.",
                    options: ["go", "went", "gone", "going"],
                    correct: "went",
                    explanation: "Use 'went' (past tense of 'go') for completed past actions"
                },
                {
                    type: "translation",
                    english: "I did not write a single card.",
                    chinese: "我一张卡片都没写。",
                    focus: "Negative past tense structure"
                }
            ]
        },

        "direct-indirect-objects": {
            title: "Direct and Indirect Objects - 直接宾语和间接宾语",
            explanation: "English can express the same meaning using two different sentence patterns with give/send/lend verbs.",
            rules: [
                "Pattern 1: Subject + Verb + Indirect Object + Direct Object",
                "Pattern 2: Subject + Verb + Direct Object + to/for + Indirect Object",
                "Use 'to' with: give, send, lend, pass, hand, show",
                "Use 'for' with: buy, make, find, get"
            ],
            examples: [
                {
                    english: "He lent me a book.",
                    chinese: "他借给我一本书。",
                    explanation: "Pattern 1: Verb + me (indirect) + book (direct)",
                    pronunciation: "hiː lent miː ə bʊk"
                },
                {
                    english: "He lent a book to me.",
                    chinese: "他借了一本书给我。",
                    explanation: "Pattern 2: Verb + book (direct) + to me (indirect)",
                    pronunciation: "hiː lent ə bʊk tuː miː"
                },
                {
                    english: "He sent me a card.",
                    chinese: "他寄给我一张卡片。",
                    explanation: "Pattern 1 with 'send'",
                    pronunciation: "hiː sent miː ə kɑːrd"
                },
                {
                    english: "He sent a card to me.",
                    chinese: "他寄了一张卡片给我。",
                    explanation: "Pattern 2 with 'send' + 'to'",
                    pronunciation: "hiː sent ə kɑːrd tuː miː"
                },
                {
                    english: "She bought me a gift.",
                    chinese: "她给我买了一份礼物。",
                    explanation: "Pattern 1 with 'buy'",
                    pronunciation: "ʃiː bɔːt miː ə ɡɪft"
                },
                {
                    english: "She bought a gift for me.",
                    chinese: "她为我买了一份礼物。",
                    explanation: "Pattern 2 with 'buy' + 'for'",
                    pronunciation: "ʃiː bɔːt ə ɡɪft fɔːr miː"
                },
                {
                    english: "The waiter brought me the menu.",
                    chinese: "服务员给我拿来了菜单。",
                    explanation: "Pattern 1: brought + me + menu",
                    pronunciation: "ðə ˈweɪtər brɔːt miː ðə ˈmenjuː"
                },
                {
                    english: "Pass the salt to me, please.",
                    chinese: "请把盐传给我。",
                    explanation: "Pattern 2: pass + salt + to me",
                    pronunciation: "pæs ðə sɔːlt tuː miː pliːz"
                }
            ],
            exercises: [
                {
                    type: "transformation",
                    sentence: "He gave me the book.",
                    answer: "He gave the book to me.",
                    explanation: "Transform Pattern 1 to Pattern 2 using 'to'"
                }
            ]
        },

        "question-formation": {
            title: "Question Formation in Past Tense - 过去时疑问句",
            explanation: "English forms past tense questions using 'did' + subject + base verb.",
            rules: [
                "Did + subject + base verb + object?",
                "Question words: What did...? Where did...? Why did...?",
                "Answer with 'Yes, I did' or 'No, I didn't'",
                "Don't use past tense verb after 'did'"
            ],
            examples: [
                {
                    english: "Did you see the accident?",
                    chinese: "你看到事故了吗？",
                    explanation: "Yes/No question with 'did'",
                    pronunciation: "dɪd juː siː ði ˈæksədənt"
                },
                {
                    english: "What happened?",
                    chinese: "发生了什么？",
                    explanation: "Question word + past tense verb (no 'did' needed)",
                    pronunciation: "wʌt ˈhæpənd"
                },
                {
                    english: "Where did he go last summer?",
                    chinese: "去年夏天他去哪里了？",
                    explanation: "Question word + did + subject + base verb",
                    pronunciation: "wer dɪd hiː ɡoʊ læst ˈsʌmər"
                },
                {
                    english: "Why did you do that?",
                    chinese: "你为什么那样做？",
                    explanation: "'Why' questions ask for reasons",
                    pronunciation: "waɪ dɪd juː duː ðæt"
                },
                {
                    english: "How many cards did he buy?",
                    chinese: "他买了多少张卡片？",
                    explanation: "Questions about quantity",
                    pronunciation: "haʊ ˈmeni kɑːrdz dɪd hiː baɪ"
                },
                {
                    english: "Who taught you Italian?",
                    chinese: "谁教你意大利语？",
                    explanation: "When 'who' is the subject, no 'did' needed",
                    pronunciation: "huː tɔːt juː ɪˈtæljən"
                }
            ],
            exercises: [
                {
                    type: "fill_blank",
                    sentence: "_____ you write any postcards?",
                    options: ["Did", "Do", "Are", "Were"],
                    correct: "Did",
                    explanation: "Use 'Did' for past tense yes/no questions"
                }
            ]
        }
    },

    vocabulary: {
        "postcard": {
            "user_language": "明信片",
            "type": "noun",
            "pronunciation": "ˈpoʊstkɑːrd"
        },
        "send": {
            "user_language": "寄，送",
            "type": "verb",
            "pronunciation": "send"
        },
        "spoil": {
            "user_language": "损坏，破坏",
            "type": "verb",
            "pronunciation": "spɔɪl"
        },
        "holiday": {
            "user_language": "假期",
            "type": "noun",
            "pronunciation": "ˈhɑːlədeɪ"
        },
        "museum": {
            "user_language": "博物馆",
            "type": "noun",
            "pronunciation": "mjuːˈziːəm"
        },
        "public": {
            "user_language": "公共的",
            "type": "adjective",
            "pronunciation": "ˈpʌblɪk"
        },
        "garden": {
            "user_language": "花园",
            "type": "noun",
            "pronunciation": "ˈɡɑːrdən"
        },
        "friendly": {
            "user_language": "友好的",
            "type": "adjective",
            "pronunciation": "ˈfrendli"
        },
        "waiter": {
            "user_language": "服务员",
            "type": "noun",
            "pronunciation": "ˈweɪtər"
        },
        "teach": {
            "user_language": "教",
            "type": "verb",
            "pronunciation": "tiːtʃ"
        },
        "lend": {
            "user_language": "借给",
            "type": "verb",
            "pronunciation": "lend"
        },
        "understand": {
            "user_language": "理解",
            "type": "verb",
            "pronunciation": "ˌʌndərˈstænd"
        },
        "think": {
            "user_language": "想，思考",
            "type": "verb",
            "pronunciation": "θɪŋk"
        },
        "pass": {
            "user_language": "过去，通过",
            "type": "verb",
            "pronunciation": "pæs"
        },
        "quickly": {
            "user_language": "快速地",
            "type": "adverb",
            "pronunciation": "ˈkwɪkli"
        },
        "decision": {
            "user_language": "决定",
            "type": "noun",
            "pronunciation": "dɪˈsɪʒən"
        },
        "early": {
            "user_language": "早",
            "type": "adverb",
            "pronunciation": "ˈɜːrli"
        },
        "buy": {
            "user_language": "买",
            "type": "verb",
            "pronunciation": "baɪ"
        },
        "spend": {
            "user_language": "花费，度过",
            "type": "verb",
            "pronunciation": "spend"
        },
        "whole": {
            "user_language": "整个的",
            "type": "adjective",
            "pronunciation": "hoʊl"
        },
        "single": {
            "user_language": "单一的，唯一的",
            "type": "adjective",
            "pronunciation": "ˈsɪŋɡəl"
        },
        "write": {
            "user_language": "写",
            "type": "verb",
            "pronunciation": "raɪt"
        },
        "visit": {
            "user_language": "参观",
            "type": "verb",
            "pronunciation": "ˈvɪzɪt"
        },
        "sit": {
            "user_language": "坐",
            "type": "verb",
            "pronunciation": "sɪt"
        },
        "read": {
            "user_language": "读",
            "type": "verb",
            "pronunciation": "riːd"
        },
        "word": {
            "user_language": "单词",
            "type": "noun",
            "pronunciation": "wɜːrd"
        },
        "line": {
            "user_language": "行，线",
            "type": "noun",
            "pronunciation": "laɪn"
        },
        "friend": {
            "user_language": "朋友",
            "type": "noun",
            "pronunciation": "frend"
        },
        "room": {
            "user_language": "房间",
            "type": "noun",
            "pronunciation": "ruːm"
        },
        "card": {
            "user_language": "卡片",
            "type": "noun",
            "pronunciation": "kɑːrd"
        }
    },

    // === SENTENCES FOR GAMES (extracted from stories) ===
    sentences: [
        {
            english: "Postcards always spoil my holidays.",
            chinese: "明信片总是破坏我的假期。",
            prononciation: "ˈpoʊstkɑːrdz ˈɔːlweɪz spɔɪl maɪ ˈhɑːlədeɪz"
        },
        {
            english: "Last summer, I went to Italy.",
            chinese: "去年夏天，我去了意大利。",
            prononciation: "læst ˈsʌmər aɪ wɛnt tuː ˈɪtəli"
        },
        {
            english: "I visited museums and sat in public gardens.",
            chinese: "我参观了博物馆，坐在公园里。",
            prononciation: "aɪ ˈvɪzɪtɪd mjuˈziəmz ænd sæt ɪn ˈpʌblɪk ˈgɑːrdənz"
        },
        {
            english: "I thought about postcards every day.",
            chinese: "我每天都想着明信片。",
            prononciation: "aɪ θɔːt əˈbaʊt ˈpoʊstkɑːrdz ˈɛvri deɪ"
        },
        {
            english: "I did not send cards to my friends.",
            chinese: "我没有给朋友寄明信片。",
            prononciation: "aɪ dɪd nɑːt sɛnd kɑːrdz tuː maɪ frɛndz"
        },
        {
            english: "On the last day I made a big decision.",
            chinese: "在最后一天我做了一个重大决定。",
            prononciation: "ɑːn ðə læst deɪ aɪ meɪd ə bɪg dɪˈsɪʒən"
        },
        {
            english: "I got up early and bought thirty-seven cards.",
            chinese: "我早早起床买了三十七张明信片。",
            prononciation: "aɪ gɑːt ʌp ˈɜːrli ænd bɔːt ˈθɜːrti ˈsɛvən kɑːrdz"
        },
        {
            english: "I spent the whole day in my room.",
            chinese: "我在房间里待了一整天。",
            prononciation: "aɪ spɛnt ðə hoʊl deɪ ɪn maɪ ruːm"
        },
        {
            english: "I wrote one card to myself.",
            chinese: "我给自己写了一张明信片。",
            prononciation: "aɪ roʊt wʌn kɑːrd tuː maɪˈsɛlf"
        },
        {
            english: "My holidays passed quickly but I did not send any cards.",
            chinese: "我的假期过得很快，但我没有寄任何明信片。",
            prononciation: "maɪ ˈhɑːlədeɪz pæst ˈkwɪkli bʌt aɪ dɪd nɑːt sɛnd ˈɛni kɑːrdz"
        }
    ],

    story: {
        title: "Please Send Me a Card - 请给我寄一张明信片",
        totalSentences: 16,
        chapters: [
            {
                title: "Chapter 1: Holiday Plans and Problems - 假期计划和问题",
                sentences: [
                    {
                        id: 1,
                        original: "Postcards always spoil my holidays.",
                        translation: "明信片总是破坏我的假期。",
                        words: [
                            {word: "Postcards", translation: "明信片", type: "noun", pronunciation: "ˈpoʊstkɑːrdz"},
                            {word: "always", translation: "总是", type: "adverb", pronunciation: "ˈɔːlweɪz"},
                            {word: "spoil", translation: "破坏", type: "verb", pronunciation: "spɔɪl"},
                            {word: "my", translation: "我的", type: "pronoun", pronunciation: "maɪ"},
                            {word: "holidays", translation: "假期", type: "noun", pronunciation: "ˈhɑːlədeɪz"}
                        ]
                    },
                    {
                        id: 2,
                        original: "Last summer, I went to Italy.",
                        translation: "去年夏天，我去了意大利。",
                        words: [
                            {word: "Last", translation: "去年", type: "adjective", pronunciation: "læst"},
                            {word: "summer", translation: "夏天", type: "noun", pronunciation: "ˈsʌmər"},
                            {word: "I", translation: "我", type: "pronoun", pronunciation: "aɪ"},
                            {word: "went", translation: "去了", type: "verb", pronunciation: "went"},
                            {word: "to", translation: "到", type: "preposition", pronunciation: "tuː"},
                            {word: "Italy", translation: "意大利", type: "noun", pronunciation: "ˈɪtəli"}
                        ]
                    },
                    {
                        id: 3,
                        original: "I visited museums and sat in public gardens.",
                        translation: "我参观了博物馆，坐在公共花园里。",
                        words: [
                            {word: "I", translation: "我", type: "pronoun", pronunciation: "aɪ"},
                            {word: "visited", translation: "参观了", type: "verb", pronunciation: "ˈvɪzɪtɪd"},
                            {word: "museums", translation: "博物馆", type: "noun", pronunciation: "mjuːˈziːəmz"},
                            {word: "and", translation: "和", type: "conjunction", pronunciation: "ænd"},
                            {word: "sat", translation: "坐", type: "verb", pronunciation: "sæt"},
                            {word: "in", translation: "在", type: "preposition", pronunciation: "ɪn"},
                            {word: "public", translation: "公共的", type: "adjective", pronunciation: "ˈpʌblɪk"},
                            {word: "gardens", translation: "花园", type: "noun", pronunciation: "ˈɡɑːrdənz"}
                        ]
                    },
                    {
                        id: 4,
                        original: "A friendly waiter taught me a few words of Italian.",
                        translation: "一个友好的服务员教了我几个意大利语单词。",
                        words: [
                            {word: "A", translation: "一个", type: "article", pronunciation: "ə"},
                            {word: "friendly", translation: "友好的", type: "adjective", pronunciation: "ˈfrendli"},
                            {word: "waiter", translation: "服务员", type: "noun", pronunciation: "ˈweɪtər"},
                            {word: "taught", translation: "教了", type: "verb", pronunciation: "tɔːt"},
                            {word: "me", translation: "我", type: "pronoun", pronunciation: "miː"},
                            {word: "a few", translation: "几个", type: "determiner", pronunciation: "ə fjuː"},
                            {word: "words", translation: "单词", type: "noun", pronunciation: "wɜːrdz"},
                            {word: "of", translation: "的", type: "preposition", pronunciation: "ʌv"},
                            {word: "Italian", translation: "意大利语", type: "noun", pronunciation: "ɪˈtæljən"}
                        ]
                    },
                    {
                        id: 5,
                        original: "Then he lent me a book.",
                        translation: "然后他借给我一本书。",
                        words: [
                            {word: "Then", translation: "然后", type: "adverb", pronunciation: "ðen"},
                            {word: "he", translation: "他", type: "pronoun", pronunciation: "hiː"},
                            {word: "lent", translation: "借给", type: "verb", pronunciation: "lent"},
                            {word: "me", translation: "我", type: "pronoun", pronunciation: "miː"},
                            {word: "a", translation: "一本", type: "article", pronunciation: "ə"},
                            {word: "book", translation: "书", type: "noun", pronunciation: "bʊk"}
                        ]
                    },
                    {
                        id: 6,
                        original: "I read a few lines, but I did not understand a word.",
                        translation: "我读了几行，但一个词都不懂。",
                        words: [
                            {word: "I", translation: "我", type: "pronoun", pronunciation: "aɪ"},
                            {word: "read", translation: "读了", type: "verb", pronunciation: "red"},
                            {word: "a few", translation: "几", type: "determiner", pronunciation: "ə fjuː"},
                            {word: "lines", translation: "行", type: "noun", pronunciation: "laɪnz"},
                            {word: "but", translation: "但是", type: "conjunction", pronunciation: "bʌt"},
                            {word: "I", translation: "我", type: "pronoun", pronunciation: "aɪ"},
                            {word: "did not", translation: "没有", type: "auxiliary", pronunciation: "dɪd nɑːt"},
                            {word: "understand", translation: "理解", type: "verb", pronunciation: "ˌʌndərˈstænd"},
                            {word: "a", translation: "一个", type: "article", pronunciation: "ə"},
                            {word: "word", translation: "词", type: "noun", pronunciation: "wɜːrd"}
                        ]
                    },
                    {
                        id: 7,
                        original: "Every day I thought about postcards.",
                        translation: "每天我都想着明信片。",
                        words: [
                            {word: "Every", translation: "每", type: "adjective", pronunciation: "ˈevri"},
                            {word: "day", translation: "天", type: "noun", pronunciation: "deɪ"},
                            {word: "I", translation: "我", type: "pronoun", pronunciation: "aɪ"},
                            {word: "thought", translation: "想", type: "verb", pronunciation: "θɔːt"},
                            {word: "about", translation: "关于", type: "preposition", pronunciation: "əˈbaʊt"},
                            {word: "postcards", translation: "明信片", type: "noun", pronunciation: "ˈpoʊstkɑːrdz"}
                        ]
                    },
                    {
                        id: 8,
                        original: "My holidays passed quickly, but I did not send cards to my friends.",
                        translation: "我的假期过得很快，但我没有给朋友们寄卡片。",
                        words: [
                            {word: "My", translation: "我的", type: "pronoun", pronunciation: "maɪ"},
                            {word: "holidays", translation: "假期", type: "noun", pronunciation: "ˈhɑːlədeɪz"},
                            {word: "passed", translation: "过去了", type: "verb", pronunciation: "pæst"},
                            {word: "quickly", translation: "快速地", type: "adverb", pronunciation: "ˈkwɪkli"},
                            {word: "but", translation: "但是", type: "conjunction", pronunciation: "bʌt"},
                            {word: "I", translation: "我", type: "pronoun", pronunciation: "aɪ"},
                            {word: "did not", translation: "没有", type: "auxiliary", pronunciation: "dɪd nɑːt"},
                            {word: "send", translation: "寄", type: "verb", pronunciation: "send"},
                            {word: "cards", translation: "卡片", type: "noun", pronunciation: "kɑːrdz"},
                            {word: "to", translation: "给", type: "preposition", pronunciation: "tuː"},
                            {word: "my", translation: "我的", type: "pronoun", pronunciation: "maɪ"},
                            {word: "friends", translation: "朋友们", type: "noun", pronunciation: "frends"}
                        ]
                    }
                ]
            },
            {
                title: "Chapter 2: The Big Decision - 重大决定",
                sentences: [
                    {
                        id: 9,
                        original: "On the last day I made a big decision.",
                        translation: "在最后一天，我做了一个重大决定。",
                        words: [
                            {word: "On", translation: "在", type: "preposition", pronunciation: "ɑːn"},
                            {word: "the", translation: "这", type: "article", pronunciation: "ðə"},
                            {word: "last", translation: "最后的", type: "adjective", pronunciation: "læst"},
                            {word: "day", translation: "天", type: "noun", pronunciation: "deɪ"},
                            {word: "I", translation: "我", type: "pronoun", pronunciation: "aɪ"},
                            {word: "made", translation: "做了", type: "verb", pronunciation: "meɪd"},
                            {word: "a", translation: "一个", type: "article", pronunciation: "ə"},
                            {word: "big", translation: "重大的", type: "adjective", pronunciation: "bɪɡ"},
                            {word: "decision", translation: "决定", type: "noun", pronunciation: "dɪˈsɪʒən"}
                        ]
                    },
                    {
                        id: 10,
                        original: "I got up early and bought thirty-seven cards.",
                        translation: "我早早起床，买了三十七张卡片。",
                        words: [
                            {word: "I", translation: "我", type: "pronoun", pronunciation: "aɪ"},
                            {word: "got up", translation: "起床", type: "phrasal verb", pronunciation: "ɡɑːt ʌp"},
                            {word: "early", translation: "早", type: "adverb", pronunciation: "ˈɜːrli"},
                            {word: "and", translation: "和", type: "conjunction", pronunciation: "ænd"},
                            {word: "bought", translation: "买了", type: "verb", pronunciation: "bɔːt"},
                            {word: "thirty-seven", translation: "三十七", type: "number", pronunciation: "ˈθɜːrti ˈsevən"},
                            {word: "cards", translation: "卡片", type: "noun", pronunciation: "kɑːrdz"}
                        ]
                    },
                    {
                        id: 11,
                        original: "I spent the whole day in my room, but I did not write a single card!",
                        translation: "我在房间里待了一整天，但连一张卡片都没写！",
                        words: [
                            {word: "I", translation: "我", type: "pronoun", pronunciation: "aɪ"},
                            {word: "spent", translation: "度过", type: "verb", pronunciation: "spent"},
                            {word: "the", translation: "这", type: "article", pronunciation: "ðə"},
                            {word: "whole", translation: "整个", type: "adjective", pronunciation: "hoʊl"},
                            {word: "day", translation: "天", type: "noun", pronunciation: "deɪ"},
                            {word: "in", translation: "在", type: "preposition", pronunciation: "ɪn"},
                            {word: "my", translation: "我的", type: "pronoun", pronunciation: "maɪ"},
                            {word: "room", translation: "房间", type: "noun", pronunciation: "ruːm"},
                            {word: "but", translation: "但是", type: "conjunction", pronunciation: "bʌt"},
                            {word: "I", translation: "我", type: "pronoun", pronunciation: "aɪ"},
                            {word: "did not", translation: "没有", type: "auxiliary", pronunciation: "dɪd nɑːt"},
                            {word: "write", translation: "写", type: "verb", pronunciation: "raɪt"},
                            {word: "a", translation: "一张", type: "article", pronunciation: "ə"},
                            {word: "single", translation: "单一的", type: "adjective", pronunciation: "ˈsɪŋɡəl"},
                            {word: "card", translation: "卡片", type: "noun", pronunciation: "kɑːrd"}
                        ]
                    }
                ]
            }
        ]
    },

    // === GRAMMAR-BASED FILL IN THE BLANKS ===
    fillInBlanks: [
        {
            sentence: "Last summer, I _____ to Italy.",
            options: ["go", "went", "gone", "going"],
            correctAnswer: "went",
            explanation: "Use 'went' (past tense of 'go') for completed past actions",
            grammarFocus: "past-tense-verbs"
        },
        {
            sentence: "A waiter _____ me some Italian words.",
            options: ["teach", "taught", "teaching", "teaches"],
            correctAnswer: "taught",
            explanation: "Use 'taught' (past tense of 'teach') for past actions",
            grammarFocus: "past-tense-verbs"
        },
        {
            sentence: "I _____ not understand a word.",
            options: ["do", "did", "does", "done"],
            correctAnswer: "did",
            explanation: "Use 'did' for negative past tense sentences",
            grammarFocus: "past-tense-verbs"
        },
        {
            sentence: "He _____ me a book.",
            options: ["lent", "lend", "lending", "lends"],
            correctAnswer: "lent",
            explanation: "Use 'lent' (past tense of 'lend') for completed past actions",
            grammarFocus: "past-tense-verbs"
        },
        {
            sentence: "I _____ thirty-seven cards.",
            options: ["buy", "bought", "buying", "buys"],
            correctAnswer: "bought",
            explanation: "Use 'bought' (past tense of 'buy') for past actions",
            grammarFocus: "past-tense-verbs"
        },
        {
            sentence: "He lent a book _____ me.",
            options: ["for", "to", "at", "in"],
            correctAnswer: "to",
            explanation: "Use 'to' with verbs like lend, send, give in Pattern 2",
            grammarFocus: "direct-indirect-objects"
        },
        {
            sentence: "She bought a gift _____ me.",
            options: ["for", "to", "at", "in"],
            correctAnswer: "for",
            explanation: "Use 'for' with verbs like buy, make, find in Pattern 2",
            grammarFocus: "direct-indirect-objects"
        },
        {
            sentence: "_____ you visit any museums?",
            options: ["Do", "Did", "Are", "Were"],
            correctAnswer: "Did",
            explanation: "Use 'Did' for past tense yes/no questions",
            grammarFocus: "question-formation"
        },
        {
            sentence: "_____ happened yesterday?",
            options: ["What", "Where", "When", "Why"],
            correctAnswer: "What",
            explanation: "Use 'What' to ask about events or things that happened",
            grammarFocus: "question-formation"
        },
        {
            sentence: "_____ did you go last summer?",
            options: ["What", "Where", "When", "Why"],
            correctAnswer: "Where",
            explanation: "Use 'Where' to ask about places",
            grammarFocus: "question-formation"
        }
    ],

    // === GRAMMAR CORRECTION EXERCISES ===
    corrections: [
        {
            incorrect: "I goed to Italy last summer.",
            correct: "I went to Italy last summer.",
            explanation: "Use 'went' (irregular past tense) not 'goed'",
            grammarFocus: "past-tense-verbs"
        },
        {
            incorrect: "He teached me Italian words.",
            correct: "He taught me Italian words.",
            explanation: "Use 'taught' (irregular past tense) not 'teached'",
            grammarFocus: "past-tense-verbs"
        },
        {
            incorrect: "I don't understand a word.",
            correct: "I didn't understand a word.",
            explanation: "Use past tense 'didn't' for past events, not present 'don't'",
            grammarFocus: "past-tense-verbs"
        },
        {
            incorrect: "I buyed thirty-seven cards.",
            correct: "I bought thirty-seven cards.",
            explanation: "Use 'bought' (irregular past tense) not 'buyed'",
            grammarFocus: "past-tense-verbs"
        },
        {
            incorrect: "He lent a book for me.",
            correct: "He lent a book to me.",
            explanation: "Use 'to' with 'lend', not 'for'",
            grammarFocus: "direct-indirect-objects"
        },
        {
            incorrect: "She bought a gift to me.",
            correct: "She bought a gift for me.",
            explanation: "Use 'for' with 'buy', not 'to'",
            grammarFocus: "direct-indirect-objects"
        },
        {
            incorrect: "Where you went last summer?",
            correct: "Where did you go last summer?",
            explanation: "Use 'did' + base verb for past tense questions",
            grammarFocus: "question-formation"
        },
        {
            incorrect: "What you did yesterday?",
            correct: "What did you do yesterday?",
            explanation: "Use 'did' + base verb for past tense questions",
            grammarFocus: "question-formation"
        }
    ],

    // === ADDITIONAL READING STORIES ===
    additionalStories: [
        {
            title: "The Accident Story - 事故故事",
            totalSentences: 12,
            chapters: [
                {
                    title: "Chapter 1: What Happened? - 发生了什么？",
                    sentences: [
                        {
                            id: 1,
                            original: "Did you see the accident, sir?",
                            translation: "先生，你看到那个事故了吗？",
                            words: [
                                {word: "Did", translation: "...吗", type: "auxiliary", pronunciation: "dɪd"},
                                {word: "you", translation: "你", type: "pronoun", pronunciation: "juː"},
                                {word: "see", translation: "看到", type: "verb", pronunciation: "siː"},
                                {word: "the", translation: "那个", type: "article", pronunciation: "ðə"},
                                {word: "accident", translation: "事故", type: "noun", pronunciation: "ˈæksədənt"},
                                {word: "sir", translation: "先生", type: "noun", pronunciation: "sɜːr"}
                            ]
                        },
                        {
                            id: 2,
                            original: "Yes, I did. The driver of that car hit that post over there.",
                            translation: "是的，我看到了。那辆车的司机撞到了那边的柱子。",
                            words: [
                                {word: "Yes", translation: "是的", type: "interjection", pronunciation: "jes"},
                                {word: "I", translation: "我", type: "pronoun", pronunciation: "aɪ"},
                                {word: "did", translation: "看到了", type: "auxiliary", pronunciation: "dɪd"},
                                {word: "The", translation: "那", type: "article", pronunciation: "ðə"},
                                {word: "driver", translation: "司机", type: "noun", pronunciation: "ˈdraɪvər"},
                                {word: "of", translation: "的", type: "preposition", pronunciation: "ʌv"},
                                {word: "that", translation: "那辆", type: "determiner", pronunciation: "ðæt"},
                                {word: "car", translation: "车", type: "noun", pronunciation: "kɑːr"},
                                {word: "hit", translation: "撞到", type: "verb", pronunciation: "hɪt"},
                                {word: "that", translation: "那个", type: "determiner", pronunciation: "ðæt"},
                                {word: "post", translation: "柱子", type: "noun", pronunciation: "poʊst"},
                                {word: "over there", translation: "那边", type: "phrase", pronunciation: "ˈoʊvər ðer"}
                            ]
                        },
                        {
                            id: 3,
                            original: "What happened?",
                            translation: "发生了什么？",
                            words: [
                                {word: "What", translation: "什么", type: "pronoun", pronunciation: "wʌt"},
                                {word: "happened", translation: "发生了", type: "verb", pronunciation: "ˈhæpənd"}
                            ]
                        },
                        {
                            id: 4,
                            original: "A dog ran across the road and the driver tried to avoid it.",
                            translation: "一只狗跑过马路，司机试图避开它。",
                            words: [
                                {word: "A", translation: "一只", type: "article", pronunciation: "ə"},
                                {word: "dog", translation: "狗", type: "noun", pronunciation: "dɔːɡ"},
                                {word: "ran", translation: "跑", type: "verb", pronunciation: "ræn"},
                                {word: "across", translation: "穿过", type: "preposition", pronunciation: "əˈkrɔːs"},
                                {word: "the", translation: "这", type: "article", pronunciation: "ðə"},
                                {word: "road", translation: "马路", type: "noun", pronunciation: "roʊd"},
                                {word: "and", translation: "和", type: "conjunction", pronunciation: "ænd"},
                                {word: "the", translation: "这", type: "article", pronunciation: "ðə"},
                                {word: "driver", translation: "司机", type: "noun", pronunciation: "ˈdraɪvər"},
                                {word: "tried", translation: "试图", type: "verb", pronunciation: "traɪd"},
                                {word: "to", translation: "去", type: "preposition", pronunciation: "tuː"},
                                {word: "avoid", translation: "避开", type: "verb", pronunciation: "əˈvɔɪd"},
                                {word: "it", translation: "它", type: "pronoun", pronunciation: "ɪt"}
                            ]
                        },
                        {
                            id: 5,
                            original: "The car suddenly came towards me.",
                            translation: "汽车突然向我冲来。",
                            words: [
                                {word: "The", translation: "这", type: "article", pronunciation: "ðə"},
                                {word: "car", translation: "汽车", type: "noun", pronunciation: "kɑːr"},
                                {word: "suddenly", translation: "突然", type: "adverb", pronunciation: "ˈsʌdənli"},
                                {word: "came", translation: "来了", type: "verb", pronunciation: "keɪm"},
                                {word: "towards", translation: "向", type: "preposition", pronunciation: "tɔːrdz"},
                                {word: "me", translation: "我", type: "pronoun", pronunciation: "miː"}
                            ]
                        },
                        {
                            id: 6,
                            original: "It climbed on to the pavement and crashed into that post.",
                            translation: "它爬上了人行道，撞到了那个柱子。",
                            words: [
                                {word: "It", translation: "它", type: "pronoun", pronunciation: "ɪt"},
                                {word: "climbed", translation: "爬上", type: "verb", pronunciation: "klaɪmd"},
                                {word: "on to", translation: "到...上", type: "preposition", pronunciation: "ɑːn tuː"},
                                {word: "the", translation: "这", type: "article", pronunciation: "ðə"},
                                {word: "pavement", translation: "人行道", type: "noun", pronunciation: "ˈpeɪvmənt"},
                                {word: "and", translation: "和", type: "conjunction", pronunciation: "ænd"},
                                {word: "crashed", translation: "撞", type: "verb", pronunciation: "kræʃt"},
                                {word: "into", translation: "进", type: "preposition", pronunciation: "ˈɪntuː"},
                                {word: "that", translation: "那个", type: "determiner", pronunciation: "ðæt"},
                                {word: "post", translation: "柱子", type: "noun", pronunciation: "poʊst"}
                            ]
                        },
                        {
                            id: 7,
                            original: "What did you do?",
                            translation: "你做了什么？",
                            words: [
                                {word: "What", translation: "什么", type: "pronoun", pronunciation: "wʌt"},
                                {word: "did", translation: "做", type: "auxiliary", pronunciation: "dɪd"},
                                {word: "you", translation: "你", type: "pronoun", pronunciation: "juː"},
                                {word: "do", translation: "了", type: "verb", pronunciation: "duː"}
                            ]
                        },
                        {
                            id: 8,
                            original: "I ran across the street after the dog.",
                            translation: "我跟着狗跑过了街道。",
                            words: [
                                {word: "I", translation: "我", type: "pronoun", pronunciation: "aɪ"},
                                {word: "ran", translation: "跑", type: "verb", pronunciation: "ræn"},
                                {word: "across", translation: "穿过", type: "preposition", pronunciation: "əˈkrɔːs"},
                                {word: "the", translation: "这", type: "article", pronunciation: "ðə"},
                                {word: "street", translation: "街道", type: "noun", pronunciation: "striːt"},
                                {word: "after", translation: "跟着", type: "preposition", pronunciation: "ˈæftər"},
                                {word: "the", translation: "这", type: "article", pronunciation: "ðə"},
                                {word: "dog", translation: "狗", type: "noun", pronunciation: "dɔːɡ"}
                            ]
                        },
                        {
                            id: 9,
                            original: "Why did you do that? Were you afraid of the car?",
                            translation: "你为什么那样做？你害怕汽车吗？",
                            words: [
                                {word: "Why", translation: "为什么", type: "adverb", pronunciation: "waɪ"},
                                {word: "did", translation: "做", type: "auxiliary", pronunciation: "dɪd"},
                                {word: "you", translation: "你", type: "pronoun", pronunciation: "juː"},
                                {word: "do", translation: "了", type: "verb", pronunciation: "duː"},
                                {word: "that", translation: "那样", type: "pronoun", pronunciation: "ðæt"},
                                {word: "Were", translation: "是", type: "verb", pronunciation: "wər"},
                                {word: "you", translation: "你", type: "pronoun", pronunciation: "juː"},
                                {word: "afraid", translation: "害怕", type: "adjective", pronunciation: "əˈfreɪd"},
                                {word: "of", translation: "的", type: "preposition", pronunciation: "ʌv"},
                                {word: "the", translation: "这", type: "article", pronunciation: "ðə"},
                                {word: "car", translation: "汽车", type: "noun", pronunciation: "kɑːr"}
                            ]
                        },
                        {
                            id: 10,
                            original: "I wasn't afraid of the car. I was afraid of the driver.",
                            translation: "我不害怕汽车。我害怕司机。",
                            words: [
                                {word: "I", translation: "我", type: "pronoun", pronunciation: "aɪ"},
                                {word: "wasn't", translation: "不", type: "auxiliary", pronunciation: "ˈwʌzənt"},
                                {word: "afraid", translation: "害怕", type: "adjective", pronunciation: "əˈfreɪd"},
                                {word: "of", translation: "的", type: "preposition", pronunciation: "ʌv"},
                                {word: "the", translation: "这", type: "article", pronunciation: "ðə"},
                                {word: "car", translation: "汽车", type: "noun", pronunciation: "kɑːr"},
                                {word: "I", translation: "我", type: "pronoun", pronunciation: "aɪ"},
                                {word: "was", translation: "是", type: "verb", pronunciation: "wʌz"},
                                {word: "afraid", translation: "害怕", type: "adjective", pronunciation: "əˈfreɪd"},
                                {word: "of", translation: "的", type: "preposition", pronunciation: "ʌv"},
                                {word: "the", translation: "这", type: "article", pronunciation: "ðə"},
                                {word: "driver", translation: "司机", type: "noun", pronunciation: "ˈdraɪvər"}
                            ]
                        },
                        {
                            id: 11,
                            original: "The driver got out of the car and began shouting at me.",
                            translation: "司机从车里出来，开始对我大喊。",
                            words: [
                                {word: "The", translation: "这", type: "article", pronunciation: "ðə"},
                                {word: "driver", translation: "司机", type: "noun", pronunciation: "ˈdraɪvər"},
                                {word: "got out", translation: "出来", type: "phrasal verb", pronunciation: "ɡɑːt aʊt"},
                                {word: "of", translation: "从", type: "preposition", pronunciation: "ʌv"},
                                {word: "the", translation: "这", type: "article", pronunciation: "ðə"},
                                {word: "car", translation: "车", type: "noun", pronunciation: "kɑːr"},
                                {word: "and", translation: "和", type: "conjunction", pronunciation: "ænd"},
                                {word: "began", translation: "开始", type: "verb", pronunciation: "bɪˈɡæn"},
                                {word: "shouting", translation: "大喊", type: "verb", pronunciation: "ˈʃaʊtɪŋ"},
                                {word: "at", translation: "对", type: "preposition", pronunciation: "æt"},
                                {word: "me", translation: "我", type: "pronoun", pronunciation: "miː"}
                            ]
                        },
                        {
                            id: 12,
                            original: "You see, it was my dog.",
                            translation: "你看，那是我的狗。",
                            words: [
                                {word: "You", translation: "你", type: "pronoun", pronunciation: "juː"},
                                {word: "see", translation: "看", type: "verb", pronunciation: "siː"},
                                {word: "it", translation: "它", type: "pronoun", pronunciation: "ɪt"},
                                {word: "was", translation: "是", type: "verb", pronunciation: "wʌz"},
                                {word: "my", translation: "我的", type: "pronoun", pronunciation: "maɪ"},
                                {word: "dog", translation: "狗", type: "noun", pronunciation: "dɔːɡ"}
                            ]
                        }
                    ]
                }
            ]
        },
        {
            title: "Roy's CD Collection - 罗伊的CD收藏",
            totalSentences: 10,
            chapters: [
                {
                    title: "Chapter 1: My Friend Roy - 我的朋友罗伊",
                    sentences: [
                        {
                            id: 1,
                            original: "My friend, Roy, died last year.",
                            translation: "我的朋友罗伊去年去世了。",
                            words: [
                                {word: "My", translation: "我的", type: "pronoun", pronunciation: "maɪ"},
                                {word: "friend", translation: "朋友", type: "noun", pronunciation: "frend"},
                                {word: "Roy", translation: "罗伊", type: "noun", pronunciation: "rɔɪ"},
                                {word: "died", translation: "去世了", type: "verb", pronunciation: "daɪd"},
                                {word: "last", translation: "去年", type: "adjective", pronunciation: "læst"},
                                {word: "year", translation: "年", type: "noun", pronunciation: "jɪr"}
                            ]
                        },
                        {
                            id: 2,
                            original: "He left me his CD player and his collection of CDs.",
                            translation: "他留给我他的CD播放器和CD收藏。",
                            words: [
                                {word: "He", translation: "他", type: "pronoun", pronunciation: "hiː"},
                                {word: "left", translation: "留给", type: "verb", pronunciation: "left"},
                                {word: "me", translation: "我", type: "pronoun", pronunciation: "miː"},
                                {word: "his", translation: "他的", type: "pronoun", pronunciation: "hɪz"},
                                {word: "CD player", translation: "CD播放器", type: "noun", pronunciation: "ˌsiː ˈdiː ˈpleɪər"},
                                {word: "and", translation: "和", type: "conjunction", pronunciation: "ænd"},
                                {word: "his", translation: "他的", type: "pronoun", pronunciation: "hɪz"},
                                {word: "collection", translation: "收藏", type: "noun", pronunciation: "kəˈlekʃən"},
                                {word: "of", translation: "的", type: "preposition", pronunciation: "ʌv"},
                                {word: "CDs", translation: "CD", type: "noun", pronunciation: "ˌsiː ˈdiːz"}
                            ]
                        },
                        {
                            id: 3,
                            original: "Roy spent a lot of money on CDs.",
                            translation: "罗伊在CD上花了很多钱。",
                            words: [
                                {word: "Roy", translation: "罗伊", type: "noun", pronunciation: "rɔɪ"},
                                {word: "spent", translation: "花了", type: "verb", pronunciation: "spent"},
                                {word: "a lot of", translation: "很多", type: "phrase", pronunciation: "ə lɑːt ʌv"},
                                {word: "money", translation: "钱", type: "noun", pronunciation: "ˈmʌni"},
                                {word: "on", translation: "在...上", type: "preposition", pronunciation: "ɑːn"},
                                {word: "CDs", translation: "CD", type: "noun", pronunciation: "ˌsiː ˈdiːz"}
                            ]
                        },
                        {
                            id: 4,
                            original: "He bought one or two new CDs every week.",
                            translation: "他每周买一两张新CD。",
                            words: [
                                {word: "He", translation: "他", type: "pronoun", pronunciation: "hiː"},
                                {word: "bought", translation: "买", type: "verb", pronunciation: "bɔːt"},
                                {word: "one or two", translation: "一两张", type: "phrase", pronunciation: "wʌn ɔːr tuː"},
                                {word: "new", translation: "新的", type: "adjective", pronunciation: "nuː"},
                                {word: "CDs", translation: "CD", type: "noun", pronunciation: "ˌsiː ˈdiːz"},
                                {word: "every", translation: "每", type: "adjective", pronunciation: "ˈevri"},
                                {word: "week", translation: "周", type: "noun", pronunciation: "wiːk"}
                            ]
                        },
                        {
                            id: 5,
                            original: "He never went to the cinema or to the theatre.",
                            translation: "他从不去电影院或剧院。",
                            words: [
                                {word: "He", translation: "他", type: "pronoun", pronunciation: "hiː"},
                                {word: "never", translation: "从不", type: "adverb", pronunciation: "ˈnevər"},
                                {word: "went", translation: "去", type: "verb", pronunciation: "went"},
                                {word: "to", translation: "到", type: "preposition", pronunciation: "tuː"},
                                {word: "the", translation: "这", type: "article", pronunciation: "ðə"},
                                {word: "cinema", translation: "电影院", type: "noun", pronunciation: "ˈsɪnəmə"},
                                {word: "or", translation: "或", type: "conjunction", pronunciation: "ɔːr"},
                                {word: "to", translation: "到", type: "preposition", pronunciation: "tuː"},
                                {word: "the", translation: "这", type: "article", pronunciation: "ðə"},
                                {word: "theatre", translation: "剧院", type: "noun", pronunciation: "ˈθiːətər"}
                            ]
                        },
                        {
                            id: 6,
                            original: "He stayed at home every evening and listened to music.",
                            translation: "他每天晚上都待在家里听音乐。",
                            words: [
                                {word: "He", translation: "他", type: "pronoun", pronunciation: "hiː"},
                                {word: "stayed", translation: "待", type: "verb", pronunciation: "steɪd"},
                                {word: "at", translation: "在", type: "preposition", pronunciation: "æt"},
                                {word: "home", translation: "家", type: "noun", pronunciation: "hoʊm"},
                                {word: "every", translation: "每", type: "adjective", pronunciation: "ˈevri"},
                                {word: "evening", translation: "晚上", type: "noun", pronunciation: "ˈiːvnɪŋ"},
                                {word: "and", translation: "和", type: "conjunction", pronunciation: "ænd"},
                                {word: "listened", translation: "听", type: "verb", pronunciation: "ˈlɪsənd"},
                                {word: "to", translation: "...的", type: "preposition", pronunciation: "tuː"},
                                {word: "music", translation: "音乐", type: "noun", pronunciation: "ˈmjuːzɪk"}
                            ]
                        },
                        {
                            id: 7,
                            original: "He often lent CDs to his friends.",
                            translation: "他经常把CD借给朋友。",
                            words: [
                                {word: "He", translation: "他", type: "pronoun", pronunciation: "hiː"},
                                {word: "often", translation: "经常", type: "adverb", pronunciation: "ˈɔːfən"},
                                {word: "lent", translation: "借给", type: "verb", pronunciation: "lent"},
                                {word: "CDs", translation: "CD", type: "noun", pronunciation: "ˌsiː ˈdiːz"},
                                {word: "to", translation: "给", type: "preposition", pronunciation: "tuː"},
                                {word: "his", translation: "他的", type: "pronoun", pronunciation: "hɪz"},
                                {word: "friends", translation: "朋友", type: "noun", pronunciation: "frends"}
                            ]
                        },
                        {
                            id: 8,
                            original: "Sometimes they kept them.",
                            translation: "有时他们会留下这些CD。",
                            words: [
                                {word: "Sometimes", translation: "有时", type: "adverb", pronunciation: "ˈsʌmtaɪmz"},
                                {word: "they", translation: "他们", type: "pronoun", pronunciation: "ðeɪ"},
                                {word: "kept", translation: "留下", type: "verb", pronunciation: "kept"},
                                {word: "them", translation: "它们", type: "pronoun", pronunciation: "ðem"}
                            ]
                        },
                        {
                            id: 9,
                            original: "He lost many CDs in this way.",
                            translation: "他就这样丢失了很多CD。",
                            words: [
                                {word: "He", translation: "他", type: "pronoun", pronunciation: "hiː"},
                                {word: "lost", translation: "丢失了", type: "verb", pronunciation: "lɔːst"},
                                {word: "many", translation: "很多", type: "adjective", pronunciation: "ˈmeni"},
                                {word: "CDs", translation: "CD", type: "noun", pronunciation: "ˌsiː ˈdiːz"},
                                {word: "in", translation: "以", type: "preposition", pronunciation: "ɪn"},
                                {word: "this", translation: "这种", type: "determiner", pronunciation: "ðɪs"},
                                {word: "way", translation: "方式", type: "noun", pronunciation: "weɪ"}
                            ]
                        }
                    ]
                }
            ]
        }
    ]
};

// ============================================================================
// CONTENT STRUCTURE SUMMARY - FOR AI REFERENCE
// ============================================================================
//
// REQUIRED SECTIONS (for basic compatibility):
// - vocabulary: Object with word keys, 25+ entries focusing on past tense verbs and travel
// - Basic metadata: id, name, description, difficulty (intermediate level)
//
// RECOMMENDED SECTIONS (for optimal experience):
// - grammar: 3 topics covering past tense, direct/indirect objects, and questions
// - story: Main postcard narrative with 11 sentences across 2 chapters
// - fillInBlanks: 10 exercises focusing on past tense and object patterns
//
// OPTIONAL SECTIONS (for enhanced features):
// - corrections: Past tense error fixing exercises
// - additionalStories: Accident story and Roy's CD collection
//
// ============================================================================
// GAME COMPATIBILITY REFERENCE
// ============================================================================
//
// VOCABULARY-BASED GAMES:
// - Focus on past tense irregular verbs: went, taught, lent, bought, thought, spent
// - Travel and holiday vocabulary: postcard, museum, garden, waiter, decision
// - Question formation and time expressions
//
// STORY-BASED GAMES:
// - Main story: Postcard holiday narrative with relatable vacation theme
// - Supporting stories: Accident dialogue and friend's hobby story
//
// GRAMMAR-FOCUSED GAMES:
// - Past tense verb formation (regular and irregular)
// - Direct vs indirect object patterns with give/lend/send verbs
// - Question formation with did/what/where/why
//
// ============================================================================
// LANGUAGE LEARNING FOCUS
// ============================================================================
//
// TARGET SKILLS:
// - Past tense narrative storytelling
// - Travel and holiday vocabulary
// - Polite conversation and questions
// - Time expressions and sequence words
//
// DIFFICULTY LEVEL: Intermediate
// - Complex sentence structures with multiple clauses
// - Irregular past tense verbs requiring memorization
// - Direct/indirect object transformations
// - Question formation with auxiliary verbs
//
// ============================================================================