“It is time + 从句”表示的是说话人的个人愿望,意思是“本来到了做某事的时间,但是却与事实相反”,因此从句要用虚拟语气。对现在虚拟用从句的谓语动词过去时,对过去的虚拟用过去完成时,对将来虚拟用“should+原形【should 可以省略】”。如:
It is time (that) you got up. 你早该起床了。(事实上还没起来)
It was time (that) he had done his homework yesterday. 他本该昨天就要完成作业。(事实上没有写完)
同样类型的虚拟从句还有——
had better + that 从句 — 倒是希望某人做某事
如:I’d better we went home earlier. 我倒是希望我们在一点回家
would rather + that 从句 — 宁愿某人做某事
如:I would rather he (should) come tomorrow. 我宁愿你明天来。
wish + that 从句 — 但愿某人做某事就好了
如:I wish I were a bird. 但愿我能变成一只鸟