why don't you后面跟什么

Why don't you+动词原形。例句：Why don't you have a cup of hot water？为什么不喝一杯热水？

例句

1、Why don't you get yourself a car?

你为什么不买辆汽车呢？

2、Why don't you look in on me next time you're in town?

你下次进城顺便来看看我好吗？

3、Why don't you come over to England in the summer?

你为何不在夏天来英格兰呢？

4、You look hot ─ why don't you peel off?

你看来很热——为何不脱掉衣服？

5、It's very late now ─ why don't you sleep over?

现在已经很晚了——为什么不就睡这儿呢？