学霸男神撩上暖萌妻:may,must的肯否回答是什么?
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may:yes,sb.may/can
no,sb.may not/can't
must:yes,sb.must
no,sb. needn't/mustn't(一般情况下用NEEDN'T,除非是一定不能做的)
肯:
yes sb/sth can
sb must
否:
sb can't
sb needn't
can't
needn't
can't
needn't/mustn't