反义疑问句,前肯后否,前否后肯,因为前句为must,must的否定形式是needn't而不是mustn't,mustn't意为禁止,needn't意为不必,如: Must I go to school(我一定要去上学吗?) Yes,you must(是的,你必须去) No,you needn't(不,你不必去) 若写作No,you mustn't即为“不,你禁止去”
1、mustn't→must mustn't在陈述句中的意思是不允许,禁止时,它的反义疑问句用must或may 例:You mustn't smoke here, must you?或may you? 2、must→needn't 当must在陈述句中作“必须”解时,它的反义疑问句就变成needn't 例:You must go now ,needn't you?追答