是what happen...还是what happens...?

问题描述:

是what happen...还是what happens...?

通常用: What happened?

疑问词what做主语,谓语动词用单数,即what happens.或过去时态what happened.

what happens
因为问发生了什么,还不知道,what 作为第三人称,所以要加S
本人觉得,应该是what happened,因为肯定是发生过了是过去时.

what happens
what是单数用法