What's happen?是词组吗

What's happen?是词组吗 What's happen? what's happen what's going to happen what would happen if .可不可以是what will happen if . what's happen的's代表什么到底是has还是is？还有我在书是上看的就是what's happen swwety,what 's happen to you? What's Going To Happen 歌词 是what happen...还是what happens...? happen用法what's happened to you What's happened toyou what happen to you what's happened to you what's the w____ things that could happen?是新概念里的 What happen what happen What happen...What's the matter ...What's wrong .的用法～后面+什么?He has learnt a lot______his teacher?a,about b,form c,by d,with求show off ,show up ,show around,show in 四个词组的意思? 请问：happen的用法.eg:what happened,what's happen的区别 what's happen的S怎样理解这样表示对吗 please tell me what's happen这个语句法有错吗? what if 的完全形式是 what would happen 还是what will happen