英语造句急!why not do sthwhy don't you do sth

英语造句急!why not do sthwhy don't you do sth don't you do sth=why not do sth造句,词组造20句子, why not do sth.=why don't you do sth.还等于什么 Why not do sth.=Why don't you do sth.=什么? 22题,不是有why not to do sth why don't you do sth Why don't do sth和 why not do sth有什么区别? why don't you do=why not doing why not 同义词是 why don't you 还是 why don't you do 用"why not do sth"造句 why don't you do 简单英语造句1、shall we do (sth.2、let's do (sth.).3、why not do (sth why not do sth