used to say what is right or expected
You should always tell the truth.
你应该永远说实话。
used to give advice
You should try to get more sleep.
你应该试着多睡一会儿。
used to say what you expect to happen
The package should arrive tomorrow.
包裹应该明天到达。
used to say something expected did not happen
It should be sunny now, but it's raining.
现在应该是晴天,但却在下雨。
past form of shall in reported speech
She asked what time she should come.
她问她应该什么时候来。
used after that in suggestions
He suggested that I should visit the museum.
他建议我应该参观博物馆。
used to give uncertain opinions
I should think the meeting will be short.
我想会议应该会很短。
used to show strong agreement
You should agree that this is important.
你应该同意这很重要。
used to show surprise or annoyance
Who should I see but my old teacher!
我竟然看到了我的老老师!
used to tell about something surprising
You should have seen how happy she was.
你真该看看她当时有多开心。
used after feeling words
It's strange that he should say that.
他竟然说那种话,真奇怪。
used in polite requests
I should like to ask a question.
我想请教一个问题。
used instead of would in some cases
If I lost my job, I should look for a new one.
如果我失业了,我会找一份新工作。
used to talk about possible events
If you should need help, just call me.
如果你需要帮助,就给我打电话。