虚拟语气：Itis（high）timethat

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。例如：

It is time that the children went to bed. 孩子们该睡觉了。

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

（责任编辑：）