what did you do

来源：百度知道编辑：UC知道时间：2024/06/25 17:54:57

为什么过去做某事用 what did you do
不用 what did you did

第一个did在这里是be动词
do在这里表示“做”的意思
What did you did，没有这种表达方式。
就比如：What do（be动词） you do（做）？
l do（做） my homework.改为特殊疑问句的话（在my homework这里划线）：What do you do？也是加了一个be动词

助动词后应加动词原形

这是基本语法，一般过去时，前一个did助动词

后面真正的动词用原型

前一个did是助动词，用了助动词或者助动词后面，要用动词原形。

助词do/does/did 后用动词原形

did 后动词要用原形

What did you do? 是什么意思？ when did you do和what did you do 区别英语短文 What did you do yestoday ----What did you do last Sunday, Peter? what did you do last night? What do you say? What did you say? What did you said? what do you say,what you say,what did you say —do you know what he did all day? what did you do last weekend?____went on a picnic. what more did you do to have fun什么意思