// === ENGLISH LEARNING MODULE ===
// Complete English learning module with Chinese translation and pronunciation

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

window.ContentModules.SBSLevel1 = {
    id: "sbs-level-1",
    name: "SBS-1",
    description: "English introduction lessons with Chinese translation and pronunciation",
    difficulty: "beginner",
    language: "en-US",
    userLanguage: "zh-CN",
    totalWords: 150,

    // === GRAMMAR LESSONS SYSTEM ===
    grammar: {
        "to-be-verb": {
            title: "The Verb 'To Be' - 动词Be",
            explanation: "The verb 'be' is one of the most important verbs in English, used to describe states, identity, and location.",
            rules: [
                "I am - 我是 (first person singular)",
                "You are - 你是/你们是 (second person)",
                "He/She/It is - 他/她/它是 (third person singular)",
                "We are - 我们是 (first person plural)",
                "They are - 他们是 (third person plural)"
            ],
            examples: [
                {
                    english: "My name is Maria.",
                    chinese: "我的名字是玛丽亚。",
                    explanation: "Use 'is' because 'name' is third person singular",
                    pronunciation: "/maɪ neɪm ɪz məˈriːə/"
                },
                {
                    english: "I am from Mexico City.",
                    chinese: "我来自墨西哥城。",
                    explanation: "Use 'am' because the subject is 'I'",
                    pronunciation: "/aɪ æm frʌm ˈmeksɪkoʊ ˈsɪti/"
                },
                {
                    english: "Where are you from?",
                    chinese: "你来自哪里？",
                    explanation: "Use 'are' because the subject is 'you'",
                    pronunciation: "/wer ɑr ju frʌm/"
                }
            ],
            exercises: [
                {
                    type: "fill_blank",
                    sentence: "My address _____ 235 Main Street.",
                    options: ["am", "is", "are"],
                    correct: "is",
                    explanation: "Use 'is' because 'address' is third person singular"
                },
                {
                    type: "translation",
                    english: "What's your phone number?",
                    chinese: "你的电话号码是多少？",
                    focus: "Contraction What's = What is"
                }
            ]
        },

        "contractions": {
            title: "Contractions - 缩写形式",
            explanation: "English often uses contractions to make conversation more natural and fluent.",
            rules: [
                "What's = What is - 什么是",
                "I'm = I am - 我是", 
                "You're = You are - 你是",
                "He's/She's/It's = He/She/It is - 他/她/它是"
            ],
            examples: [
                {
                    english: "What's your name?",
                    chinese: "你叫什么名字？",
                    explanation: "What's is the contraction of What is",
                    pronunciation: "/wʌts jʊr neɪm/"
                },
                {
                    english: "I'm Nancy Lee.",
                    chinese: "我是南希·李。",
                    explanation: "I'm is the contraction of I am",
                    pronunciation: "/aɪm ˈnænsi li/"
                }
            ],
            exercises: [
                {
                    type: "contraction_match",
                    full_form: "What is your address?",
                    contracted: "What's your address?",
                    chinese: "你的地址是什么？"
                }
            ]
        },

        "personal-information": {
            title: "Personal Information - 个人信息",
            explanation: "Learn how to ask for and provide basic personal information in English.",
            rules: [
                "Name - 姓名: What's your name? My name is...",
                "Address - 地址: What's your address? My address is...", 
                "Phone - 电话: What's your phone number? My phone number is...",
                "Origin - 来源: Where are you from? I'm from..."
            ],
            examples: [
                {
                    english: "My name is David Carter.",
                    chinese: "我的名字是大卫·卡特。",
                    explanation: "Standard expression for introducing name",
                    pronunciation: "/maɪ neɪm ɪz ˈdeɪvɪd ˈkɑrtər/"
                },
                {
                    english: "I'm from San Francisco.",
                    chinese: "我来自旧金山。",
                    explanation: "Expression for stating origin",
                    pronunciation: "/aɪm frʌm sæn frænˈsɪskoʊ/"
                }
            ],
            exercises: [
                {
                    type: "dialogue_completion",
                    prompt: "A: What's your name? B: _____",
                    answer: "My name is [your name].",
                    chinese: "A: 你叫什么名字？ B: 我的名字是[你的名字]。"
                }
            ]
        },

        "meeting-people": {
            title: "Meeting People - 与人见面",
            explanation: "Common phrases and expressions used when meeting new people.",
            rules: [
                "Hello - 你好 (formal greeting)",
                "Hi - 嗨 (informal greeting)",
                "Nice to meet you - 很高兴认识你",
                "Nice to meet you, too - 我也很高兴认识你"
            ],
            examples: [
                {
                    english: "Hello. My name is Peter Lewis.",
                    chinese: "你好。我的名字是彼得·刘易斯。",
                    explanation: "Formal introduction",
                    pronunciation: "/həˈloʊ maɪ neɪm ɪz ˈpitər ˈluɪs/"
                },
                {
                    english: "Hi. I'm Nancy Lee. Nice to meet you.",
                    chinese: "嗨。我是南希·李。很高兴认识你。",
                    explanation: "Informal introduction with greeting",
                    pronunciation: "/haɪ aɪm ˈnænsi li naɪs tu mit ju/"
                }
            ],
            exercises: [
                {
                    type: "role_play",
                    scenario: "Meeting someone new",
                    dialogue: "A: Hello. B: Hi. A: What's your name? B: My name is ____."
                }
            ]
        }
    },

    vocabulary: {
        "name": {
            "user_language": "名字",
            "type": "noun",
            "pronunciation": "/neɪm/"
        },
        "address": {
            "user_language": "地址", 
            "type": "noun",
            "pronunciation": "/əˈdres/"
        },
        "phone number": {
            "user_language": "电话号码",
            "type": "noun", 
            "pronunciation": "/foʊn ˈnʌmbər/"
        },
        "telephone number": {
            "user_language": "电话号码",
            "type": "noun",
            "pronunciation": "/ˈteləfoʊn ˈnʌmbər/"
        },
        "apartment number": {
            "user_language": "公寓号码",
            "type": "noun",
            "pronunciation": "/əˈpɑrtmənt ˈnʌmbər/"
        },
        "e-mail address": {
            "user_language": "电子邮件地址",
            "type": "noun",
            "pronunciation": "/ˈiːmeɪl əˈdres/"
        },
        "first name": {
            "user_language": "名",
            "type": "noun", 
            "pronunciation": "/fɜrst neɪm/"
        },
        "last name": {
            "user_language": "姓",
            "type": "noun",
            "pronunciation": "/læst neɪm/"
        },
        "hello": {
            "user_language": "你好",
            "type": "interjection",
            "pronunciation": "/həˈloʊ/"
        },
        "hi": {
            "user_language": "嗨",
            "type": "interjection", 
            "pronunciation": "/haɪ/"
        },
        "nice to meet you": {
            "user_language": "很高兴认识你",
            "type": "phrase",
            "pronunciation": "/naɪs tu mit ju/"
        },
        "where": {
            "user_language": "哪里",
            "type": "adverb",
            "pronunciation": "/wer/"
        },
        "from": {
            "user_language": "来自",
            "type": "preposition",
            "pronunciation": "/frʌm/"
        },
        "alphabet": {
            "user_language": "字母表",
            "type": "noun",
            "pronunciation": "/ˈælfəbet/"
        },
        "numbers": {
            "user_language": "数字",
            "type": "noun",
            "pronunciation": "/ˈnʌmbərz/"
        }
    },

    story: {
        title: "To Be: Introduction - 动词Be的介绍",
        totalSentences: 50,
        chapters: [
            {
                title: "Chapter 1: Vocabulary Preview - 第一章：词汇预览",
                sentences: [
                    {
                        id: 1,
                        original: "Learn the alphabet Aa Bb Cc Dd Ee Ff Gg Hh Ii Jj Kk Ll Mm Nn Oo Pp Qq Rr Ss Tt Uu Vv Ww Xx Yy Zz",
                        translation: "学习字母表 Aa Bb Cc Dd Ee Ff Gg Hh Ii Jj Kk Ll Mm Nn Oo Pp Qq Rr Ss Tt Uu Vv Ww Xx Yy Zz",
                        words: [
                            {word: "Learn", translation: "学习", type: "verb", pronunciation: "/lɜrn/"},
                            {word: "alphabet", translation: "字母表", type: "noun", pronunciation: "/ˈælfəbet/"}
                        ]
                    },
                    {
                        id: 2,
                        original: "Practice numbers 0 1 2 3 4 5 6 7 8 9 10",
                        translation: "练习数字 0 1 2 3 4 5 6 7 8 9 10",
                        words: [
                            {word: "Practice", translation: "练习", type: "verb", pronunciation: "/ˈpræktɪs/"},
                            {word: "numbers", translation: "数字", type: "noun", pronunciation: "/ˈnʌmbərz/"}
                        ]
                    },
                    {
                        id: 3,
                        original: "This is Maria's name tag.",
                        translation: "这是玛丽亚的姓名牌。",
                        words: [
                            {word: "This", translation: "这", type: "pronoun", pronunciation: "/ðɪs/"},
                            {word: "is", translation: "是", type: "verb", pronunciation: "/ɪz/"},
                            {word: "Maria's", translation: "玛丽亚的", type: "possessive", pronunciation: "/məˈriːəz/"},
                            {word: "name", translation: "姓名", type: "noun", pronunciation: "/neɪm/"},
                            {word: "tag", translation: "牌", type: "noun", pronunciation: "/tæg/"}
                        ]
                    },
                    {
                        id: 4,
                        original: "235 Main Street is an address.",
                        translation: "主街235号是一个地址。",
                        words: [
                            {word: "235", translation: "235", type: "number", pronunciation: "/tu ˈθɜrti faɪv/"},
                            {word: "Main", translation: "主要的", type: "adjective", pronunciation: "/meɪn/"},
                            {word: "Street", translation: "街", type: "noun", pronunciation: "/strit/"},
                            {word: "is", translation: "是", type: "verb", pronunciation: "/ɪz/"},
                            {word: "an", translation: "一个", type: "article", pronunciation: "/æn/"},
                            {word: "address", translation: "地址", type: "noun", pronunciation: "/əˈdres/"}
                        ]
                    },
                    {
                        id: 5,
                        original: "741-8906 is a telephone number.",
                        translation: "741-8906是一个电话号码。",
                        words: [
                            {word: "741-8906", translation: "741-8906", type: "number", pronunciation: "/ˈsevən fɔr wʌn eɪt naɪn oʊ sɪks/"},
                            {word: "is", translation: "是", type: "verb", pronunciation: "/ɪz/"},
                            {word: "a", translation: "一个", type: "article", pronunciation: "/ə/"},
                            {word: "telephone", translation: "电话", type: "noun", pronunciation: "/ˈteləfoʊn/"},
                            {word: "number", translation: "号码", type: "noun", pronunciation: "/ˈnʌmbər/"}
                        ]
                    }
                ]
            },
            {
                title: "Chapter 2: What's Your Name? - 第二章：你叫什么名字？",
                sentences: [
                    {
                        id: 6,
                        original: "What's your name?",
                        translation: "你叫什么名字？",
                        words: [
                            {word: "What's", translation: "什么是", type: "contraction", pronunciation: "/wʌts/"},
                            {word: "your", translation: "你的", type: "possessive", pronunciation: "/jʊr/"},
                            {word: "name", translation: "名字", type: "noun", pronunciation: "/neɪm/"}
                        ]
                    },
                    {
                        id: 7,
                        original: "My name is Maria.",
                        translation: "我的名字是玛丽亚。",
                        words: [
                            {word: "My", translation: "我的", type: "possessive", pronunciation: "/maɪ/"},
                            {word: "name", translation: "名字", type: "noun", pronunciation: "/neɪm/"},
                            {word: "is", translation: "是", type: "verb", pronunciation: "/ɪz/"},
                            {word: "Maria", translation: "玛丽亚", type: "name", pronunciation: "/məˈriːə/"}
                        ]
                    },
                    {
                        id: 8,
                        original: "What's your address?",
                        translation: "你的地址是什么？",
                        words: [
                            {word: "What's", translation: "什么是", type: "contraction", pronunciation: "/wʌts/"},
                            {word: "your", translation: "你的", type: "possessive", pronunciation: "/jʊr/"},
                            {word: "address", translation: "地址", type: "noun", pronunciation: "/əˈdres/"}
                        ]
                    },
                    {
                        id: 9,
                        original: "My address is 235 Main Street.",
                        translation: "我的地址是主街235号。",
                        words: [
                            {word: "My", translation: "我的", type: "possessive", pronunciation: "/maɪ/"},
                            {word: "address", translation: "地址", type: "noun", pronunciation: "/əˈdres/"},
                            {word: "is", translation: "是", type: "verb", pronunciation: "/ɪz/"},
                            {word: "235", translation: "235", type: "number", pronunciation: "/tu ˈθɜrti faɪv/"},
                            {word: "Main", translation: "主要的", type: "adjective", pronunciation: "/meɪn/"},
                            {word: "Street", translation: "街", type: "noun", pronunciation: "/strit/"}
                        ]
                    },
                    {
                        id: 10,
                        original: "I'm from Mexico City.",
                        translation: "我来自墨西哥城。",
                        words: [
                            {word: "I'm", translation: "我是", type: "contraction", pronunciation: "/aɪm/"},
                            {word: "from", translation: "来自", type: "preposition", pronunciation: "/frʌm/"},
                            {word: "Mexico", translation: "墨西哥", type: "place", pronunciation: "/ˈmeksɪkoʊ/"},
                            {word: "City", translation: "城", type: "noun", pronunciation: "/ˈsɪti/"}
                        ]
                    }
                ]
            },
            {
                title: "Chapter 3: Meeting People - 第三章：与人见面",
                sentences: [
                    {
                        id: 11,
                        original: "Hello. My name is Peter Lewis.",
                        translation: "你好。我的名字是彼得·刘易斯。",
                        words: [
                            {word: "Hello", translation: "你好", type: "interjection", pronunciation: "/həˈloʊ/"},
                            {word: "My", translation: "我的", type: "possessive", pronunciation: "/maɪ/"},
                            {word: "name", translation: "名字", type: "noun", pronunciation: "/neɪm/"},
                            {word: "is", translation: "是", type: "verb", pronunciation: "/ɪz/"},
                            {word: "Peter", translation: "彼得", type: "name", pronunciation: "/ˈpitər/"},
                            {word: "Lewis", translation: "刘易斯", type: "name", pronunciation: "/ˈluɪs/"}
                        ]
                    },
                    {
                        id: 12,
                        original: "Hi. I'm Nancy Lee. Nice to meet you.",
                        translation: "嗨。我是南希·李。很高兴认识你。",
                        words: [
                            {word: "Hi", translation: "嗨", type: "interjection", pronunciation: "/haɪ/"},
                            {word: "I'm", translation: "我是", type: "contraction", pronunciation: "/aɪm/"},
                            {word: "Nancy", translation: "南希", type: "name", pronunciation: "/ˈnænsi/"},
                            {word: "Lee", translation: "李", type: "name", pronunciation: "/li/"},
                            {word: "Nice", translation: "很好的", type: "adjective", pronunciation: "/naɪs/"},
                            {word: "to", translation: "到", type: "preposition", pronunciation: "/tu/"},
                            {word: "meet", translation: "遇见", type: "verb", pronunciation: "/mit/"},
                            {word: "you", translation: "你", type: "pronoun", pronunciation: "/ju/"}
                        ]
                    },
                    {
                        id: 13,
                        original: "Nice to meet you, too.",
                        translation: "我也很高兴认识你。",
                        words: [
                            {word: "Nice", translation: "很好的", type: "adjective", pronunciation: "/naɪs/"},
                            {word: "to", translation: "到", type: "preposition", pronunciation: "/tu/"},
                            {word: "meet", translation: "遇见", type: "verb", pronunciation: "/mit/"},
                            {word: "you", translation: "你", type: "pronoun", pronunciation: "/ju/"},
                            {word: "too", translation: "也", type: "adverb", pronunciation: "/tu/"}
                        ]
                    }
                ]
            }
        ]
    },

    // === GRAMMAR-BASED FILL IN THE BLANKS ===
    fillInBlanks: [
        {
            sentence: "My name _____ David.",
            options: ["am", "is", "are"],
            correctAnswer: "is",
            explanation: "Use 'is' because 'name' is third person singular",
            grammarFocus: "to-be-verb"
        },
        {
            sentence: "I _____ from China.",
            options: ["am", "is", "are"],
            correctAnswer: "am",
            explanation: "Use 'am' because the subject is 'I'",
            grammarFocus: "to-be-verb"
        },
        {
            sentence: "_____ your phone number?",
            options: ["What", "What's", "Where"],
            correctAnswer: "What's",
            explanation: "What's = What is, used to ask for phone number",
            grammarFocus: "contractions"
        },
        {
            sentence: "Where _____ you from?",
            options: ["am", "is", "are"],
            correctAnswer: "are",
            explanation: "Use 'are' because the subject is 'you'",
            grammarFocus: "to-be-verb"
        },
        {
            sentence: "_____ to meet you.",
            options: ["Nice", "Good", "Fine"],
            correctAnswer: "Nice",
            explanation: "Standard expression for meeting people",
            grammarFocus: "meeting-people"
        }
    ],

    // === GRAMMAR CORRECTION EXERCISES ===
    corrections: [
        {
            incorrect: "My name are John.",
            correct: "My name is John.",
            explanation: "'Name' is third person singular, so use 'is'",
            grammarFocus: "to-be-verb"
        },
        {
            incorrect: "Where you are from?",
            correct: "Where are you from?",
            explanation: "In questions, the be verb comes before the subject",
            grammarFocus: "to-be-verb"
        },
        {
            incorrect: "What is you name?",
            correct: "What is your name?",
            explanation: "Use possessive 'your' not subject pronoun 'you'",
            grammarFocus: "personal-information"
        },
        {
            incorrect: "I are from Mexico.",
            correct: "I am from Mexico.",
            explanation: "Use 'am' with subject 'I'",
            grammarFocus: "to-be-verb"
        }
    ]
};