一般疑问句:有实义动词用do/does/did、没有用be,yes/no回答+动词还原规则
引言
一般疑问句是英语问句的地基:Do you like apples?还是 Are you happy?什么时候用 do,什么时候用 be,一条规则就能分清。
核心概念:yes/no 回答 + 助动词选择
```text
一般疑问句 = 用 yes 或 no 回答的疑问句
选助动词只看一句话:句子里有没有实义动词
有实义动词 → do/does/did
没有实义动词(形容词/名词/介词短语)→ be 动词
```
```text
Do you like apples? 你喜欢吃苹果吗?(有动词 like → do)
Yes, I do. / No, I don't.
Are you happy? 你幸福吗?(形容词 happy → be)
Are you students? 你们是学生吗?(名词 students → be)
Are you at home? 你在家吗?(介词短语 at home → be)
```
三个变形规则
```text
① 第三人称单数:do → does,动词还原
Does she like music?她喜欢音乐吗?(like 不加 s)
② 一般过去时:do → did,动词还原
Did you go to school?你上学了吗?(go 不用 went)
③ be 动词直接提前,句号变问号
You are a teacher. → Are you a teacher?
```
实战练习
```text
- ______ she like bananas? → Does(三单用 does,like 还原)
- ______ they at school yesterday? → Were(过去时 be 提前)
- ______ you watch TV last night? → Did(过去时,watch 还原)
- ______ he a good student? → Is(名词作表语用 be)
```
总结
```text
一般疑问句,yes/no 来回答
有实义动词用 do/does/did,动词必须还原
有 be 动词直接提前,句号变问号
```
```text
今日小抄:
Do you like apples? Yes, I do.
Are you happy? No, I'm not.
Does she like music? Yes, she does.
```