why not 和why don't 有什么区别啊!

why not 和why don't 有什么区别啊! why don't和why not why don‘t you和why not的不同用法 Why not和 why don't后面怎么接动词 Why not do 和 Why don't do 什么区别 Why not,Why don't.有什么区别? Why don't do sth和 why not do sth有什么区别? Why don't you+...why not +. why don't we =why not 还是why don't you=why not why 和 why not 的区别 why not 可以单独使用,如：--I don't like it at all.-- why not?why可以吗 Why not 和Why don`t的区分“Why not give your teacher some flowers? 此句中为什么不用Why don`t? not 和 why don't 在语法上的区别 why don't you与why not的区别 why don't是不是等于why you not? why not是否等于why don't weRT why don't you do=why not doing why not与why don't怎么用?怎么区别 why don't you和why not后面都跟动词原形么?