剑桥MSE基础语法丨情态动词的作用(下)
今天我们将继续分享:Requests, offers and invitations请求,提议,邀请、
Suggestions and obligations建议和义务
情态动词虽然数量不多,但用途广泛,今天王老师就带大家一起来从情态动词的作用着手,一起拿下情态动词吧!
情态动词的作用:
Probability可能性
Ability能力
Permission准许
Requests, offers and invitations请求,提议,邀请
Suggestions and obligations建议和义务
4:Requests,offers and invitations请求,提议,邀请
Requests
我们使用could you .../would you ...来礼貌地告知、请求别人做某事:
Could you take a message, please?
Would you carry this for me, please?
同样可使用can/will请求别人做某事,但礼貌程度略有降低:
Can you take a message, please?
Will you take a message, please?
offers and invitations
我们使用can I... /shall I...来进行提议:
Can I help you?
Shall I help you with that?
有时也用I can/I could/I will来提议:
I can do that for you if you like.
I could give you a lift to the station.
I'll do that for you if you like.
I'll give you a lift to the station.
我们使用Would you like (to)...表示邀请:
Would you like to come round tomorrow?
Would you like another drink?
5:Suggestions and obligations建议和义务
Suggestions
我们使用should/could/shouldn't来给建议
You should send an email.
We could meet at the weekend.
You shouldn't go by train.
注意!could一般用在给出积极建议的时候。
obligations
我们使用must/mustn't/have to表达义务、必须做/不做某事:(have to严格来讲不算情态动词哦,但用法接近情态动词,所以可以一起学习)
You must stop at a red light.
I'm sorry, but you mustn't make a noise in here.
You have to go to the meeting.
注意!当在给出命令或强烈建议时通常使用must;在说到规则规定的时候通常使用have to。
如果涉及过去的话,则使用had to/couldn't表示义务:
Everyone had to bring some food to the meeting.
You couldn't make a noise in the library.
That's it! 这就是情态动词的基本用法啦!一些情态动词如can/could, must, may在这此出镜率超高,小朋友们需要重点学习记忆~
最后的最后还要强调一点:
情态动词后接动词原形!
情态动词后接动词原形!
情态动词后接动词原形!
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