一、"did" 的用法

1. "did" 是 "do" 的过去式，是表示过去的动作或状态的常用动词。例如：

- I did my homework yesterday.（昨天我做了作业。）

- She did a great job at the presentation.（她在演讲中做得非常出色。）

- They did their best to win the match.（他们尽力赢得比赛。）

二、done

1. 表示完成的状态

DONE是DO的过去分词形式，常用于表示完成的状态。例如：

- I have done my homework.（我已经完成了作业。）

- The project is done.（项目已经完成了。）

2. 表示被动语态

DONE也可以用于构造被动语态，这时需要在助动词BE后面加上DONE来表示被动状态。例如：

- The cake was done by my mom.（蛋糕是我妈妈做的。）

- The report will be done by tomorrow.（报告明天之前会完成。）

3. 表示行为或事情的结果

有时候我们需要用DONE来表示某个行为或事情的结果，例如：

- I am so done with this project!（我对这个项目已经厌倦了！）

- She is done for the day and ready to relax.（她今天已经工作完毕，准备放松一下了。）

do既可以做实意动词又可以做助动词。

根据不同的用法，do可以化身为五种不同形态，分别是do，does，did，doing和done。

1. do用于一般现在时

例句:I often do my homework in the evening.

2. does用于第三人称单数的一般现在时

例句:He does his lessons every day.

3. did用于一般过去时

例句:They did homework yesterday.

4. doing常用于现在进行时或者非谓语动词(暂时不提)

例句:He is doing his homework now.

5. done 常用于完成时，被动态或者非谓语动词(暂时不提)

例句:

He has done his homework.

He had done his homework before he went out.

His homework is done.

作为助动词，常用于疑问句和否定句。

1. 一般疑问句

例句:Do you like English?

2. 选择疑问句

例句:Does he go to school by bus or by bike?

3. 特殊疑问句

例句:How do you go to school?

4. 反义疑问句

例句:You like English, don't you?

5. 否定句

例句:I don't like English.

另外，也可以用于表示强调, 此时需要重读。

例句:He does need your help. (does重读，强调确实需要帮助)

还有，也可以代替其他的动词，使句子更简练。

例句:

Who cleaned the windows?

Tom did.