[助动词和主要动词,do的过去式]用于表示过去的时间:What did you do yesterday?
We did some sightseeing.

语法结构
1 (wh-词) | + did | + 名词短语 | +动词 | + ?
   Did you like the film?
   Why didn't you phone?
   When you were in Ibiza,did you go out a lot?
   用于一般过去时，就过去的状态、事件和习惯提出问题

2否定分句|+did|+代词|+?
 肯定分句|+didn't | + 代词+?
  Gary didn't phone,did he?
  They seemed very happy together,didn't they?
  用于在不确定的情况下核实过去的事实和想法等(这种情况用升调),或就
  已经知道的事情进一步确认(这种情况用降调).
 
3名词短语 | + did | + not | + 动词
   The Aztecs didn't have horses.
   The concert didn't finish until after midnight.
   表示某事过去并非那个样子。
4名词短评| + did | (+ not)
   Did you get some butter?~No,I didn't,but I think Jo did.
   Kristina always played a lot of sport but Angela didn't.
   回指前面的分句,避免重复。

5名词短语 | + did | + 动词
   We did enjoy the dinner.Thanks ever so much.
   I really did think it was Friday.
   Bernard has a beard...or,he did have on.
   表示强调，或作对比或更正

搭配
经常跟did连用的时间表达法有: yesterday,last night/week/month/summer/year,last Monday/Tuesday etc.,
at the weekwend,this morning.
   Did you get paid last month?
   Where did you go last summer?
   Did you see that programme on TV yesterday?

固定短语
   so did I/he/she/Diane etc. 我/他/她 /黛安娜等也是
   I like the movie.~So did I.
   Hania used to live in Egypt and so did Barbara.
   表示对过去的状态、事件或习惯的肯定陈述对别人也适用。
   neither/nor did I/he/she etc. 我/他/她等也不
   I didn't enjoy the concert very much.~Neither did I.
   Gary didn't attend the meeting and nor did Julie.
   表示对过去的状态、事件或习惯否定陈述对别人也适用
   'did she/he/you?etc' 她/他/你等真是这样吗?
   Howard phoned.~Did he?What did he want?
   对有关过去的肯定陈述表示兴趣、惊讶等。
   'didn't she/he/you ? etc' 她/他/你等真的没有这样吗？
   He didn't say.~Didn't he?How strange.
   对有关过去的否定陈述表示兴趣、惊讶等。
   'what did you do(then)?/what did you/he/she etc.say?'你当时怎么做的？/你/他/她等当时怎么说的?
   ...so then the car stopped completely.~Oh no! What did you do then?
   ...and she walked in and we all shouted 'Surprise!'~Oh,wow!What did she say?
   当有人告诉你发生在他们身上的事时，你可以用此短语来获取更多的信息。
   'I/We didn't know/realise/think etc' 我/我们不知道/没有意识到/没有想到等
   I'm sorry,I didn't realise you were waiting.
   I didn't know it was your birthday.I'm really sorry.
   道歉时给出理由
   'I'm sorry I didn't...' 对不起,我没有...
   I'm sorry I didn't phone but I was really busy.
   I'm sorry I didn't get back to you,but...
   道歉。