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should的用法情态动词should意为“应当

发布时间：2023-06-27 17:28:00 分类：娱乐浏览：147

　　情态动词should意为“应当;应该”,可用以表达:1. 询问对方的意愿;2. 职责和义务; 3. 命令或建议。如:

　　Should I open the window?

　　He should do some work, but he doesn’t want to.

　　You should be careful next time.

　　should没有人称和数的变化,其后跟动词原形。如:

　　You should see a doctor at once.

　　She should take more exercise.

　　We / They should drink milk every day.

　　should的否定式是在should后面加not,可以缩写为shouldn’t,意为“不应当;不应该”。如:

　　You should not / shouldn’t work on the computer all day.

　　含有should的一般疑问句是将should提至主语前;其简略回答分别为“Yes,

　　主语(人称代词)+should.”和“No,主语(人称代词)+shouldn’t.”。如:

　　—Should I put another spoon of salt into the soup?

　　—Yes, you should. / No, you shouldn’t.

should的用法 情态动词should意为“应当