why don't you可以等于why not.那why doesn't he可以等于吗?为什么!
问题描述：
why don't you可以等于why not.那why doesn't he可以等于吗?为什么!
答
不行.Why not do sth?= Why don't you / we do sth?是针对you或we的建议,不针对他人.那why doesn't he 有没有什么可以互换的Why doesn't he...不表示建议，是个特殊疑问句。