111++111=222 why?
why don't we =why not 还是why don't you=why not
why?
WHY
why not可以=why don't you
why don't you do=why not doing
why do not you =why not ______
what for = why 造句
what for =why吗?
E=mc 2 why?
在定语从句中Why为什么等于why=for which 不是Why=for what
Why love?Why like?Why wait?Why?
Why not do sth.=Why don't you do sth.=什么?