it's high time that we did sth.这里为什么要用虚拟语气?

问题描述:

it's high time that we did sth.这里为什么要用虚拟语气?

类似的还有吗?举些例子来看看回答:it is about time that;it is high time that;it is time that 后跟定语从句,从句中谓语动词,用过去式补充:It is (about/high) time that + Subject of Attributive Clause(定语...