骑士dk技能:must后跟实意动词时,反问部分用什么提问?
来源:百度文库 编辑:高考问答 时间:2024/05/13 07:43:13
在这里要用didn't,因为must在这个句子里表猜测,意思是她昨天一定来了,所以用didn't,又如:
He must be a worker , isn't he ?
mustn't
A.must表“必须”——附加疑问部分用must的相应形式mustn’t
①We must work hard , mustn't we ?
②You must start at once , mustn't you ?
B.must表“有必要”——附加疑问部分用needn’t
①The teacher must show concern for each student , needn’t he ?
②You must copy all of these books ,needn’t you ?
C.must表“推测”时——附加疑问部分要与主要动词相呼应
①He must be a teacher , isn’t he ?
②You must have seen the film , haven’t you ?
D.must + have + done ——用have的相应形式
——无明确的时间状语;用过去时
——有明确的过去的时间状语
①You must have lived here for a long time , haven’t you ?
②You must have have seen him yesterday ,didn’t you ?
E.当陈述部分是mustn’t 表“禁止”时——附加疑问部分用must或 may
①I mustn’t tell him about it ,must I ?(多数情况)/ may I ?
②You mustn’t smoke ,must you ?/ may you ?
didn't
mustn't