请用can；may；mus t造句？ ---Must I do the work today? -...

\u8bf7\u7528can\uff1bmay\uff1bmus t\u9020\u53e5\uff1f

1.can\u7684\u80af\u5b9a\u53e5\uff1aWe can study in the classroom . \u6211\u4eec\u53ef\u4ee5\u5728\u6559\u5ba4\u91cc\u5b66\u4e60\u3002
can\u7684\u5426\u5b9a\u53e5\uff1aI think half of us can not pass this exam .\u6211\u8ba4\u4e3a\u4e00\u534a\u7684\u540c\u5b66\u90fd\u4e0d\u80fd\u901a\u8fc7\u8fd9\u6b21\u8003\u8bd5\u3002
can\u7684\u7591\u95ee\u53e5\uff1aCan you jump like a monkey ? \u4f60\u80fd\u50cf\u7334\u5b50\u4e00\u6837\u8e66\u8df3\u5417\uff1f
\u56de\u7b54\uff1aYes,I can./No,I can't
2. May\u7684\u80af\u5b9a\u53e5\uff1aHe may have missed his train.\u4ed6\u53ef\u80fd\u6ca1\u8d76\u4e0a\u706b\u8f66\u3002
May\u7684\u5426\u5b9a\u53e5\uff1a That may not be true.\u8fd9\u53ef\u80fd\u4e0d\u662f\u771f\u7684\u3002
May\u7684\u7591\u95ee\u53e5\uff1a May I come in?\u6211\u53ef\u4ee5\u8fdb\u6765\u5417\uff1f
\u56de\u7b54\uff1aYes,You may./No,you can't
3.must\u7684\u80af\u5b9a\u53e5\uff1ayou must be careful . \u4f60\u5fc5\u987b\u8981\u5c0f\u5fc3\u70b9\u3002
must\u7684\u5426\u5b9a\u53e5\uff1aI must not lose any time . \u6211\u4e00\u4f1a\u513f\u4e5f\u4e0d\u80fd\u803d\u6401\u3002
must\u7684\u7591\u95ee\u53e5\uff1aMust I finish my homework first ?\u6211\u5fc5\u987b\u5148\u5b8c\u6210\u4f5c\u4e1a\u5417\uff1f
\u56de\u7b54\uff1aYes,You must./No , you need't .

D must\u6784\u6210\u7684\u4e00\u822c\u7591\u95ee\u53e5\u5426\u5b9a\u56de\u7b54\u901a\u5e38\u7528needn\u2019t\u6216don\u2019t have to\uff0c\u6545\u672c\u9898\u9009D\u3002

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 come here tomorrow?
No, you needn't.
You should/ought to come 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)

I can do it.
I can’t help you.
Can you help me? Yes,I can.

He may her father.
He may not in.
May I can ask you some questions? OK

It must belong to Mary.
You mustn't play on street.
Must I clean my room?No you needn't.

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