题目内容：

You had better go to the hospital.怎么变否定式?
如果是let us to do sth.

优质解答

You had better not go to the hospital.
如果是祈使句的话直接在前面加DON'T
如果是一般的句子在LET 前加助动词 加NOT
对了应该是 let us do sth 吧