why can't sb do sth?有这样的结构?还有类是的吗?why……的

why can't sb do sth?有这样的结构?还有类是的吗?why……的 sb can do sth举个例子 sb can't do sth举个例子 why don,t sb do sth同意句 why not do sth why not do sth 例如:why don't sb do sth 是七种喔快点想出几种就报上几种 why not do sth sb放哪? why dont sb.do sth.同义句 do sth as...as sb can sb doesn't usually do sth why don’t sb do同义句1.____ do sth.2.____ ____ do sth.3.____ we ____ do sth.4.will ____ ____ sth.5.would you ____ ____ do sth.就这样, can't but do sth 短词造句：encourage sb give sb support help sb(to)do sth why not do Sb Will be able to do sth 和 sb can do sth do what sb.can to do sth.如何造句 make sb to do sth与make sb t do sth有什么区别 为什么是let sb not do sth而不是let sb don't do sth? why的问句为什么有时用why can‘I do sth..有时又用Why we should do sth.到底助动词跟主语怎么放啊?为什么不能用why I can’t... Why not do sth.=Why don't you do sth.=什么? why not do sth.=why don't you do sth.还等于什么