why not后面到底是to do还是do?

问题描述:

why not后面到底是to do还是do?
这里刚刚有些人说why not后面是do原型
你说呢?
可是我在看到的都是Why not to sign up with a major label 或者Why Not To Use MSN Spaces这样的话,不是why not

why not do
why don't you du