Question

It is high time that........怎么用

Answer 1

有两种形式：A:it's high time that＋should＋动词原形 B:it's high time后用一般过去式

Answer 2

后面的从句要虚拟，虚拟的方式是：谓语动词用过去时

Answer 3

这是虚拟语气、后面可以用动词的过去式或Should加do

Answer 4

后面跟一般过去式或者should do 的形式，是虚拟语气的一种，值得注意的是这里的should不能省略。

Answer 5

引用jbp7e11574075的回答：
It is (high) time that后面的从句谓语动词要用过去式或用should加动词原形，但should不可省略。

It is time that the children went to bed.

It is high time that the children should go to bed.

跟明显，should可以省略