should的用法总结：should作为情态动词，含义为“应当”、“该”、“应该会”、“可能”、“本应”、“就将”、“假如”、“万一”、“真应当”，常用于纠正别人，或提出或征询建议，或表示预期。
should的基本意思及用法介绍
should主要用作情态动词，意为应该；就；可能；将要；本当；竟然。例句有：
1、He should have been more careful.
他应当更小心点儿才是。
2、Should I call him and apologize?
我是不是应该打电话向他道歉？
3、I should have finished the book by Friday.
到星期五我应该能读完那本书。
4、The bus should have arrived ten minutes ago.
公共汽车十分钟以前就该到了。
5、If I were asked to work on Sundays, I should resign.
要是叫我星期天加班，我就辞职不干了。
6、If you should change your mind, do let me know.
假如你改变主意的话，一定要告诉我。
7、I said (that) I should be glad to help.
我说我乐意帮忙。
8、She recommended that I should take some time off.
她建议我应该休息一段时间。
9、I find it astonishing that he should be so rude to you.
他竟然对你这样无礼，真叫我吃惊。
10、We should be grateful for your help.
对您的帮助我会非常感激。
11、I should imagine it will take about three hours.
我想得用差不多三个小时吧。
12、Why should I help him? He's never done anything for me.
我干吗要帮他呢？他从来没为我做过什么。
13、You should have seen her face when she found out!
你真该看看她发现事情真相时脸上的表情！
