第 7 课 · 第 1 阶段: 基础
do / does / did 疑问句
初级Questions with do / does / did
构成与用法
do/does/did + 主语 + 动词 — 一般时态的提问
1.什么时候需要 do / does / did
含有普通动词（work、like、go、want…）的句子，不能把这个动词提到前面来构成疑问句，而要借用助动词 do / does / did。
| 时态 | 主语 | 助动词 | 例句 |
|---|---|---|---|
| 一般现在时 | I / you / we / they | do | Do you like spicy food? |
| 一般现在时 | he / she / it | does | Does your brother drive? |
| 一般过去时 | 所有主语 | did | Did they call you? |
含有 be、can、will、have got、should… 的句子不用 do——直接把这个动词提到前面：Are you ready? Can she swim? Have you got a pen?
2.语序
（疑问词）+ do / does / did + 主语 + 动词原形 + 其他部分？
| 疑问词 | 助动词 | 主语 | 动词 | … |
|---|---|---|---|---|
| Do | you | live | near here? | |
| Where | does | your sister | work? | |
| What time | did | you | get | home? |
| How often | do | they | visit | you? |
| Why | didn't | he | come? |
助动词承担时态和人称（does = 一般现在时、he/she/it；did = 一般过去时），所以主要动词永远用原形：Does she speak…? Did you see…?
3.以介词结尾的疑问句
日常疑问句中，属于动词的介词通常放在句末。
Who do you live with?
你和谁一起住？
Where does she come from?
她是哪里人？
What did you talk about?
你们聊了什么？
4.否定疑问句
用 don't / doesn't / didn't 表示惊讶，或者期待对方同意你。
Don't you like it?
你不喜欢吗？
Why didn't you tell me?
你为什么不告诉我？
5.当 who / what 是主语时
如果 who / what 是做这个动作的人或物（即主语），疑问句里没有 do/does/did，动词和普通陈述句一样。另见“主语疑问句与宾语疑问句”一课。
Who called you?
谁给你打电话了？（who = 打电话的人；不说：Who did call you?）
Who did you call?
你给谁打电话了？（who = 被打电话的人）
What happened?
发生了什么事？
6.常见错误
You like pho?Do you like pho?
书面英语需要助动词（省略它只是随意的口语说法）。
Where she works?Where does she work?
缺少 does，而且语序错了。
Did you went out?Did you go out?
did 后面用原形。
Do you can help me?Can you help me?
有 can 的句子不用 do。
Does she is a doctor?Is she a doctor?
有 be 的句子不用 do。
例句
- Does your sister work in a bank now?
- How often do you eat out?
- Do you have a pen I can borrow?
- Do you like spicy food?
