You shouldn’t be sitting in the sun.
3. should表推测,暗含很大的可能。如:
It’s 4:30. They should be in New York by now.
Three weeks should suffice.
4. should可在某些从句中,表虚拟语气。如:
I suggest that you should stay here as if nothing had happened.
She was terrified lest they should go on talking about her.
If he should drop in, give him my message.
5. should表感情色彩,常用在以why, how开头的疑问句中。如:
Why shouldn’t you invite him?
I don’t see why we shouldn’t make friends.
How should I know? 我怎么知道?
在that引导的从句中,should也可表惋惜、忧虑、欢乐、惊讶等感情色彩。如:
I’m sorry that you should think so badly of me.
It is absurd that such things should happen to a family like theirs.
should还用于一些特殊结构,表感情色彩。如:
That it should come to this!
To think that it should have happened to me! 谁想到这种事竟发生在我身上!