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情态动词的回答1、在回答must开头的一般疑问句时,肯定回答用must,否定回答用neednt或dont have to. 如: 1)Must I finish my homework before eight oclock? Yes, you must. 2)Must I attend the meeting? No, you neednt(No, you dont 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mustnt. 如: 1)May I watch TV after supper? Yes, you may. / No, you mustnt. 2)May I stop here? No, you mustnt. 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neednt. 如: 1)Need we stay behind after school? Yes, you must. 2) Need he go now? No, he neednt.