why don't you和why not后面都跟动词原形么?

why don't you why don‘t you和why not的不同用法 Why don't you+...why not +. why don't you cry why don't you cry Why don't you 造句 Why don't you 歌词 Why don't you leave why don't you.造句 Why Don't You Play why don't和why not why aren't you 和Why don't you 的区别和用法 why don't we =why not 还是why don't you=why not Why didn't you'和Why don't you什么区别? why won't you和why don't you有什么区别吗 why not 同义词是 why don't you 还是 why don't you do no no I h() fast food why don't you like fast food why not可以=why don't you可不可以=why don't we/they. why don't you和why not后面都跟动词原形么?