题目内容

20.-Must I go out with him?
-No,you _____.(  )
A.needn'tB.mustn'tC.can'tD.couldn't

分析 ---我必须和他一起去吗?
---不,你没必要.

解答 答案:A.must引导的一般疑问句,否定回答用needn't或者don't have to,mustn't表示禁止,故选A.

点评 在回答must开头的一般疑问句时,肯定回答用must,否定回答用needn't或don't have to.如:1)-Must I finish my homework before eight o'clock?
-Yes,you must.
2)-Must I attend the meeting?
-No,you needn't(No,you don't have to).You can ask Tom to go instead.
2、在回答may开头的一般疑问句时,肯定回答用may,否定回答用mustn't.如:
1)-May I watch TV after supper?
-Yes,you may./No,you mustn't.
2)-May I stop here?
-No,you mustn't.
3、在回答need开头的一般疑问句时,肯定回答用must,否定回答用needn't.如:
1)-Need we stay behind after school?
-Yes,you must.
2)-Need he go now?
-No,he needn't.

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