571 Why not和Why don't能否换用
Why not 和 Why don't 都表示“为什么不,为何不”,表示建议或责备,但结构不同:
Why not+动词原形
Why don't +主语+谓语动词 (为特殊疑问句 )
Why not take a good rest in the shade? 是否应在树荫下好好休息一下呢?
Why not have a drink? 为什么不喝一杯呢?
Why don't you look it up in the dictionary? 你为什么不查一下字典呢?
Why not try again? 为什么不再试一下呢 ?
Why don't you try again?
Why not do like that? 为什么不那样做呢 ?
Why don't you do like that?
Why not ask him? 为什么不问他呢 ?
Why don't you ask him?
提示
表示建议也可用what about +名词或动名词,how about +名词或动名词,参见有关部分。