把两个句子合成一句的“魔法连接法”，写作立马升级
一、定语从句是什么？
定语从句就是：用一个句子来修饰名词，起到“定语”作用的从句。
它的核心功能是：补充说明一个人或物，放在这个词的后面，并由一个“关系词”连接。
二、从 who 开始：修饰人时的定语从句
我们今天讲的“主格”结构，意思是：who 在从句中作主语。
结构公式：
人 + who + 从句（who 在从句中作主语）
举例：
基础句：
- This is the girl. She sings very well.
→ 合并成定语从句：
✅ This is the girl who sings very well.
再看几个例子：
- He is the teacher who helps me every day.
- I saw a man who was running in the park.
- She knows a boy who speaks French.
三、结构拆解理解法
拿这句分析：
I met a student who loves English.
- 主句：I met a student
- 从句：who loves English
- 合成逻辑：student = who，who 在从句中做主语。
四、典型错例解析
| 错误句 | 正确句 | 错误原因 |
|---|---|---|
| This is the girl which sings well. | ✅ who sings well | 修饰人用 who，不用 which |
| I know a boy he plays piano. | ✅ who plays piano | 重复主语，who 已经代表“he” |
五、实用句型推荐
- I know someone who…
- This is the person who…
- She has a friend who…
- The boy who… is my classmate.
📌 示例范文句段：
I have a friend who always helps me with my homework.
He is the kind of person who never gives up easily.
六、写作训练任务
请合并以下句子，写出包含 who 从句的表达：
- I saw a boy. He was drawing a robot.
- This is the teacher. She taught me math.
- We met a man. He speaks five languages.
定语从句听起来复杂，但其实掌握一个关系词，就能打开句子合并的魔法大门。今天学会了 who 之后，你的英语表达马上就能更细致、更高级。想要系统掌握定语从句的各种形式？我们强烈推荐使用「李校来啦英语智能训练系统」，平台内含“定语从句专项任务”，支持拆句重构、关系词替换、句型填空等功能，让你真正掌握从“what”到“how”的每一步。
