为什么是What happened?而不是 What did happen?
为什么是What happened?而不是 What did happen?
为什么:他发生了什么?是what happened to him 而不是what did he happen?那为什么又
what happened 为什么不可以用 what did happen
what happening?如果错了,解释以下what happened?为什么不能改为what did happen
what happened 和what did happen的区别
what happened/what was happened/what is happened/what happen
What happened?中的happen不是动词吗?怎么不是写成What did happen?
what happened to him yesterday.为什么要用happened?happen可以吗
What happened to you与how did it happen?的用法
What to him last week?A.did happen B.is happing C.happened D
what happened to your car 为什么不用did
A: What happened? B: What didn't happen 这是神马意思啊!