情景导入
💡情景导入 · 从前和现在
翻开旧照片，你发现自己变了好多：以前个子矮矮的、不会游泳、怕黑；现在长高了、会游泳了、也变勇敢了。
用英语把"过去"和"现在"对比着说，就要用到 Unit 4 "Then and now" 的对比句型。这一练，我们写一篇"我的变化"。
核心词汇
📚核心词汇 Word Bank
| 单词/短语 | 意思 | 例句 |
|---|---|---|
| then / now | 那时 / 现在 | Then I was short. Now I am tall. |
| used to | 过去常常 | I used to be shy. |
| could / couldn't | 能 / 不能（过去） | I couldn't swim then. |
| be able to | 能够 | Now I am able to swim. |
| change | 变化 | I have changed a lot. |
| a few years ago | 几年前 | A few years ago, I was little. |
句型与语法
🧩语法讲解 · then 与 now 对比
核心对比结构：Then + 过去时，now + 现在时。
- Then I was short. Now I am tall. （过去是 was，现在是 am）
- I couldn't swim then. Now I can swim. （过去 couldn't，现在 can）
- I used to be afraid of dogs, but now I like them. （used to + 原形，表过去习惯）
记忆口诀：写"从前"用过去时（was/were/couldn't），写"现在"用现在时（am/is/can）。
听说训练
💬听说训练 · 开口说
- A: How have you changed? （你有什么变化？）
- B: I used to be very short. Now I am much taller. （我以前很矮，现在高多了。）
- A: What else? （还有呢？）
- B: I couldn't ride a bike then, but now I can ride very well! （那时我不会骑车，现在骑得很好！）
易错点
⚠️难点 · 易错点
- 过去用 was/were，现在用 am/is/are：Then I am short. ❌ → Then I was short. ✅
- used to 后接原形：I used to being shy. ❌ → I used to be shy. ✅
- could 后接原形：I couldn't swimming. ❌ → I couldn't swim. ✅
考点
🎯考点提示
- 书面表达：Then and Now / My Changes（六下过去与现在对比话题）；
- then + 过去时、now + 现在时的对比；
- used to / could 的用法；
- was/were 与 am/is/are 的时态区分。
诵读 Read Aloud
🎙️范文诵读 · Then and Now（建议背诵）
I have changed a lot in the past few years. A few years ago, I was a little girl. I was short and thin. I couldn't swim or ride a bike. I used to be very shy and afraid of the dark. But now I am different. I am taller and stronger. I can swim well and ride a bike fast. I am braver, too. I am growing up every day!
诵读小贴士：把"从前"和"现在"的变化换成你自己的，注意前半句用过去时、后半句用现在时。