it is high time that后面加什么

就两种用法.It is (high) time that后面的从句谓语动词要么用过去式或者用should+动词原形,但should不可省略。

例句

t is high time that we put an end to the trend.

该是咱们停止这一趋向的时辰了。

www.qtwish.com

It is high time that we put an end to the (trend).

该是我们停止这一现象趋势……的`时候了。

www.ttfanwen.com

It is high time that you thought about your future.

你该考虑一下你的将来了。

danci.911cha.com

As far as I am concerned, it is high time that we did.

我觉得是时候我们该做些什么了。