情景导入
九年级 Unit 4 的主题是 I used to be afraid of the dark.（我过去害怕黑暗。）这句话里藏着两层意思：过去怕黑，现在不怕了——used to do 天生就带着"今非昔比"的对比感。
同学们介绍变化时，往往还要交代时间和原因："当我小的时候我怕黑，但自从我上了初中，我就变勇敢了；虽然房间还是很暗，我也不怕了。"这些"当……时""自从……""虽然……"就是状语从句。一句话概括本课：used to 讲变化，状语从句管背景。把两者结合起来，你的口语和作文立刻从"短句堆砌"升级成"逻辑清晰的长句"。
核心词汇
Unit 4 描述变化的高频表达：
| 词/短语 | 意思 | 例句 |
|---|---|---|
| used to do | 过去常常做 | I used to walk to school. |
| be afraid of | 害怕 | I used to be afraid of the dark. |
| deal with | 处理，应对 | She learned to deal with problems. |
| take pride in | 以……为骄傲 | My parents take pride in me. |
| in the last few years | 在过去几年里 | Our school has changed a lot in the last few years. |
常用连词一览：when / while / as soon as / until / before / after（时间）；if / unless（条件）；because / since（原因）；although / though（让步）；so that（目的）；so … that（结果）
句型与语法
第一部分：used to 三个易混结构
| 结构 | 意思 | 例句 |
|---|---|---|
| used to do sth. | 过去常常做（现在不做了） | He used to play football. |
| be used to doing sth. | 习惯于做某事 | He is used to getting up early. |
| be used to do sth. | 被用来做某事（被动） | Wood is used to make paper. |
否定与疑问：didn't use to do 或 used not to do；疑问句 Did you use to be shy? — Yes, I did.
第二部分：五类常考状语从句
- 时间状语从句：when（当……时）、while（当……的同时，从句多用进行时）、as soon as（一……就……）、until（直到）、before / after。例：As soon as the bell rang, we ran out.
- 条件状语从句：if（如果）、unless（除非，等于 if not）。例：You will fail unless you work hard.
- 原因状语从句：because（因为，语气最强）、since / as（既然）。例：I stayed at home because it rained.
- 让步状语从句：although / though（虽然）——注意后面不能再加 but。例：Although he is young, he knows a lot.
- 目的与结果：so that（以便）引导目的；so + 形容词 + that（如此……以至于）引导结果。例：He got up early so that he could catch the bus.
必考铁律：主将从现——当主句是一般将来时，if / when / as soon as / until 引导的从句要用一般现在时代替将来时：I will call you as soon as I arrive.（不能写 will arrive）
听说训练
变化访谈（两人一组，先说过去、再说现在）：A: What did you use to be afraid of? — B: I used to be afraid of speaking in public, but now I am used to it. A: Why did you change? — B: Because my teacher helped me. When I made a speech last term, I found it fun.
语音提示：used to 在口语中读作连读的一个整体，注意 d 与 t 合并；although 的重音在第二个音节。
辨析对比
① used to do / be used to doing / be used to do：看 be 动词有没有出现——没有 be 就是"过去常常"（I used to swim.）；有 be 且后接 doing 就是"习惯于"（I am used to swimming.）；有 be 且后接 to do 就是被动的"被用来"（The knife is used to cut bread.）。
② when vs while：when 的从句既可用瞬间动词也可用延续动词（When I got home, it was raining.）；while 强调"同时进行"，从句一般接延续性动作且多用进行时（While I was reading, he came in.）。
③ although vs but：二者都表转折，但不能同时出现。Although he was tired, but he kept working. ❌ → Although he was tired, he kept working. ✅ 或 He was tired, but he kept working. ✅
文化角
英语母语者谈成长变化时特别爱用 used to。名人访谈里常听到 I used to be a shy kid, but now I speak to thousands of people.（我曾是个害羞的孩子，如今能面对上千人讲话。）这种"过去—现在"的对照，是英语演讲里最常见的开场方式之一。写中考作文时也可以借用这个套路：先用 I used to… 讲过去，再用 But now… 讲现在，中间用 because、when、although 等连词补上原因和转折。这样的结构不但地道，还能自然地展示你的从句功底。
易错点
- be used to 后接原形：I am used to get up early. ❌ → I am used to getting up early. ✅
- used to 后接 doing：He used to playing games. ❌ → He used to play games. ✅
- 违反主将从现：I will tell him when he will come back. ❌ → … when he comes back. ✅
- although 与 but 连用：Although it rained, but we went out. ❌ → 去掉 but ✅
- unless 后再加否定：Unless you don't hurry, you'll be late. ❌ → Unless you hurry, you'll be late. ✅
中考真题
— You look different now!
— Yes. I ______ be quite shy, but I'm used to ______ in front of the class now.
A. used to; speak B. used to; speaking C. am used to; speaking D. use to; speak
✏️ 点击查看解答
答案：B
解析：第一空的意思是"过去很害羞"，用 used to do，且 be 是原形，说明前面没有 be 动词，排除 C、D（use to 缺过去式）。第二空的 be used to 意为"习惯于"，是固定搭配 be used to doing，to 是介词，后面必须接动名词 speaking，排除 A。
完整句子：I used to be quite shy, but I'm used to speaking in front of the class now.
考点
- used to 三兄弟辨析几乎每年出现在单选或语法填空中；状语从句则贯穿单选、完成句子和书面表达；
- 三大命题点：① used to do 与 be used to doing 的区分 ② 主将从现 ③ although 不与 but 连用、unless 本身含否定；
- 写作提分：作文中写一句 Although it was difficult, I never gave up because I used to dream of it. 就同时用上了让步、原因和 used to。
诵读 Read Aloud
Part 1 · 短文：How I Have Changed
I used to be afraid of the dark. When I was a small child, I never went to bed unless my mother stayed beside me. Although my room was safe, I always thought something was hiding under the bed.
Things began to change after I entered middle school. Because my parents were often busy at night, I had to learn to deal with my fear. While my classmates were talking about their hobbies, I decided to try something new. I read stories in bed so that I could think about happy things before sleeping. As soon as I closed the book, I fell asleep. Now I am used to sleeping alone, and I am no longer afraid of the dark. I will remember this lesson when I meet new difficulties.
Part 2 · 句型接力（大声跟读，注意连词与时态）
I used to walk to school. Now I am used to riding a bike. Wood is used to make paper. I will call you as soon as I arrive. Although he is young, he knows a lot. You will be late unless you hurry.
诵读小贴士：读 Part 1 时画出所有连词（when、unless、although、because、while、so that、as soon as），并说出每个从句表示时间、条件、原因还是让步；读 Part 2 时特别留意 as soon as I arrive 这句——主句用将来时、从句用现在时，这就是"主将从现"的标准示范。