It'stime+thatclause时,that可省略,time可由high,about修饰,从句中的谓语动词有两种形式,或者用动词的过去式(be用were);或者用shoud+动词原形(should不能省略).此句型为虚拟语气句型,表示“现在某人该做某事了”.含有该事早该去做而未做,现在去做似乎都为时已晚的意思.例:
It'stime(that)wewenttobed.
我们该去睡觉了.
It'shightimethatthearticlewerepublished.
发表这篇文章是适时的.
It'stimeyoushoulddocleaning.
你该去打扫卫生了.