讲义

should表示推测、估计。

He is always punctual. He should be here any minute.

他是很守时的，应该马上就到了。

We should arrive there before dark. 我们在天黑前应该会到那里。

She should know some English since she has been in the U.S. for two years. 她应该会一点英文，因为她在美国待过两年。

Should常用于疑问词why, how等之后，以示惊奇、不可理解等

Why should James tell lies? James干嘛要说谎？

Why should he tell the truth? 他干嘛要说实话？

Why should I cover up for him? 我为什么要帮他掩饰？

How should I know that he is in a bad mood? 我怎么知道他心情不好？