为什么选C请逐个选项分析,Listen!His family must be quarrelling,()?A.mustn't it B.isn't it C.aren't it D.needn't they

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为什么选C请逐个选项分析,Listen!His family must be quarrelling,()?A.mustn't it B.isn't it C.aren't it D.needn't they
为什么选C请逐个选项分析,
Listen!His family must be quarrelling,()?
A.mustn't it B.isn't it C.aren't it D.needn't they

为什么选C请逐个选项分析,Listen!His family must be quarrelling,()?A.mustn't it B.isn't it C.aren't it D.needn't they
『当陈述句部分有情态动词must时,反意疑问部分有四种情况 』
(1)must表示“必须、禁止“时,反意疑问部分要用must (mustn’t) .
例 You mustn’t stop your car here,must you?你不能把车停在这地方,知道吗?
(2)must表示“有必要”时,反意疑问句部分要用needn’t.
例 They must finish the work today,needn’t they?他们今天必须要完成这项工作,是吗?
(3)当must用来表示对现在的情况进行“推测”时,反意疑问部分要根据must后面的动词采用相应的形式.
例 He must be good at maths,isn’t he?他数学一定学得很好,是吗?
(4)当must用来表示对过去的情况进行“推测”(must + have done)时,如强调对过去情况的推测(一般句中有过去的时间状语),反意疑问句部分要用“didn’t + 主语”;如果强调动作的完成(一般没有过去时间状语),反意疑问句部分要用“haven’t / hasn’t + 主语”.
例 She must have read the novel last week,didn’t she?她上星期一定读了这本小说了,是吗?
You must have told her about it,haven’t you?你一定把这事告诉她了,是吗

A表示法律方面的禁止。
B:句子前面是单数
D:前面没有NEED

选c????????
我怎么觉得该是aren't they

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