英语情景对话（零基础 → 熟练日常沟通）

📌 一句话总结：过去进行时就是"过去的某个时刻正在做的事"，强调动作正在进行中。

💡 类比理解：想象你在看一张老照片，照片里的你正在吃冰淇淋——这就是过去进行时。就像按下暂停键，定格在过去某个瞬间正在发生的动作。

🗣️ 日常口语例句：
- What were you doing at 9 last night?（昨晚9点你在干嘛？）
- I was just about to call you!（我正要给你打电话呢！）
- Were you sleeping when I came home?（我回家时你在睡觉吗？）
- Sorry, I wasn't listening.（抱歉，我刚才没在听。）
- They were playing basketball all afternoon.（他们整个下午都在打篮球。）

⚠️ 常见错误：
❌ I was study when you called. → ✅ I was studying when you called.（过去进行时必须用 was/were + doing）
❌ While I walked home, it rained. → ✅ While I was walking home, it rained.（while 后通常接过去进行时，表示持续的动作）
❌ They was watching TV. → ✅ They were watching TV.（复数主语用 were，不是 was）

🧠 记忆口诀：过去进行三要素，was/were 加 doing；when 接短动作，while 接长动作。

📌 一句话总结：过去完成时表示"过去的过去已经完成的动作"，强调动作的先后顺序。

💡 类比理解：就像你昨天（过去）回家，发现妈妈已经做好了饭（更早的过去）。过去完成时就是那个"更早的过去"，用来表示在另一个过去动作之前已经完成的事。

🗣️ 日常口语例句：
- I had already eaten when you called.（你打电话时我已经吃过了。）
- She had never seen snow before she moved to Canada.（她搬到加拿大之前从未见过雪。）
- Had you finished the report before the meeting?（开会前你完成报告了吗？）
- They had left by the time we arrived.（我们到达时他们已经离开了。）
- I realized I had forgotten my keys at home.（我意识到我把钥匙忘在家里了。）

⚠️ 常见错误：
❌ When I arrived, the train already left. → ✅ When I arrived, the train had already left.（必须用 had + 过去分词，不能省略 had）
❌ I had went to school before breakfast. → ✅ I had gone to school before breakfast.（过去分词是 gone，不是 went）
❌ She had finished her homework yesterday. → ✅ She finished her homework yesterday.（有明确的过去时间用一般过去时，不需要过去完成时）

🧠 记忆技巧：过去完成时 = had + done，就像时间倒流，先发生的用过去完成时，后发生的的用一般过去时。记住：过去的过去！

📌 一句话总结：被动语态强调"谁被做了"，而不是"谁做的"，结构是 be + 过去分词。

💡 类比理解：就像新闻报道说"银行被抢了"，重点在银行（承受者），而不是劫匪（执行者）。被动语态就是把动作的接受者放在主语位置。

🗣️ 日常口语例句：
- My phone was stolen yesterday.（我的手机昨天被偷了。）
- English is spoken all over the world.（全世界都说英语。）
- The cake was made by my mom.（这个蛋糕是我妈妈做的。）
- This song is loved by many people.（这首歌被很多人喜爱。）
- The homework must be finished before Friday.（作业必须在周五前完成。）

⚠️ 常见错误：
❌ The book was write by Lu Xun. → ✅ The book was written by Lu Xun.（被动语态必须用过去分词，不是原形）
❌ The house is build in 2020. → ✅ The house is built in 2020.（过去分词是 built，不是 build）
❌ The window was broke by the ball. → ✅ The window was broken by the ball.（过去分词是 broken，不是 broke）

🧠 记忆技巧：被动语态 = be + done（过去分词），重点在"被"字，谁被做了就用被动。

📌 一句话总结：定语从句就是用一个句子来修饰名词，关系代词 who/which/that/whose 是连接词。

💡 类比理解：就像给名词贴标签。"那个穿红衣服的女孩"——"穿红衣服的"就是定语，修饰"女孩"。定语从句就是用完整的句子来做这个修饰工作。

🗣️ 日常口语例句：
- The man who/that lives next door is very friendly.（住在隔壁的那个人很友好。）
- This is the book which/that I told you about.（这就是我跟你说过的那本书。）
- The girl whose phone rang is my sister.（手机响的那个女孩是我妹妹。）
- Do you know the boy who is playing basketball?（你认识那个打篮球的男孩吗？）
- I lost the pen that you gave me.（我把你给我的那支笔弄丢了。）

⚠️ 常见错误：
❌ The man who live next door is my teacher. → ✅ The man who lives next door is my teacher.（关系代词作主语时，谓语动词要和先行词保持一致）
❌ This is the book which I bought it yesterday. → ✅ This is the book which I bought yesterday.（关系代词作宾语时，后面不能再加宾语代词）
❌ The girl which is singing is my friend. → ✅ The girl who/that is singing is my friend.（指人用 who/that，不用 which）

🧠 记忆口诀：修饰人用 who，修饰物用 which，that 通吃人和物，whose 表示所属关系。

📌 一句话总结：间接引语就是转述别人的话，需要改变时态、人称和时间词。

💡 类比理解：就像你告诉朋友"小明说他明天要来"，你需要把小明的原话"我明天要来"转换成"他明天要来"。间接引语就是把别人的话变成你的叙述。

🗣️ 日常口语例句：
- She said, "I am tired." → She said (that) she was tired.（她说她累了。）
- He asked, "Where do you live?" → He asked where I lived.（他问我住在哪里。）
- They said, "We will come tomorrow." → They said (that) they would come the next day.（他们说他们第二天会来。）
- She asked, "Are you hungry?" → She asked if/whether I was hungry.（她问我是否饿了。）
- He said, "Don't be late." → He told me not to be late.（他告诉我不要迟到。）

⚠️ 常见错误：
❌ She said she is busy. → ✅ She said she was busy.（主句是过去时，从句时态要后移，am/is → was）
❌ He asked where do I live. → ✅ He asked where I lived.（间接疑问句用陈述语序，不用疑问语序）
❌ She said me that she was tired. → ✅ She told me that she was tired.（say 不能直接接人，要用 tell sb 或 say to sb）

🧠 记忆技巧：间接引语三变化：时态往后退一步，人称跟着主语变，时间地点要替换。