当陈述部分有情态动词must,问句有4种情况: (1)mustn't表示“禁止,不可,不必”时,附加问句通常要用must. 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,附加问句通常要用needn't. They must finish the work today,needn't they? 他们今天要完成这项工作,是吗? (3)当must用来表示对现在的情况进行推测时,问句通常要根据must后面的动词采用相应的形式。 He must be good at English,isn't he? 他英语一定学得很好,是吗? (4)当must+have done表示对过去的情况进行推测(一般句中有明确的过去时间状语),问句要根据陈述部分谓语的情况用“didn't+主语”或“wasn't/weren't+主语”;如果强调动作的完成(一般没有明确的过去时间状语),问句要用“haven't/hasn't+主语”。 She must have read the novel last week,didn't she? 她上星期一定读了这本小说,是吗? You must have told her about it,haven't you? 你一定把这事告诉她了,是吗?
Must 开头的怎样变反意疑问句
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