can能力,may请求,must命令,should建议,can't猜测,mustn't禁止.请各造一

发布时间:2021-02-24 14:49:09

can能力,may请求,must命令,should建议,can't猜测,mustn't禁止.请各造一个句子need 和shouldn't表示什么?也请各造一个句子

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首先, 必须澄清一下的是, 这些情态动词的用法是互相交叉的
因此, 你的分类并不全面
[常用的分类, 不包括全部情态动词]
1.能力can/could (有时需使用be able to, manage to)
The baby can't(couldn't) dress himself.
2.许可can/(could)/may/(might)
Can/May I watch TV tonight?
Yes, you can/may.
3.命令与禁令
must (not), will(军令式的粗暴命令), [shouldn't]
You mustn't play now!
You will finish the job tomorrow!
[据 Practical English Usage, 表示一种强制的,粗暴的命令, 就像预言未来必定发生的事件一般]
4.必要性must, need, should, ought to, need (not)
Must/Need I e here tomorrow?
No, you needn't.
You should/ought to e here on time.
5.推测can (not), could (not), must, might (not), may (not)
It can't be!
It must be Tom.
He may be in the office.
6.建议[should 更常见于 虚拟语气中] had better
I suggest that you should bring some pork tomorrow.
He had better do something for his family, hadn't he?
(注意Tag Question疑问尾句的变化)
另外,情态动词必须带 [不加to的动词不定式] 也就是原形,因此 need to do/need doing的用法不属于情态动词(显然,need这时候有人称变化)
要知道详细的用法, 请查阅一本好的语法书
(A Practical English Grammar, 薄冰, .)
======以下答案可供参考======
供参考答案1:
对need需要
should't不应该
You need to rest
You shouldn't rest
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