must be的反义疑问句怎么说？含must的反义疑问句需要注意的几个地方
must be的反义疑问句怎么说？含must的反义疑问句需要注意的几个地方3)They must have been to the Great Wall haven't they?2)They must have arrived by now haven't they?（根据by now来判断） 3)There must be some students in the room aren't there?2）对已发生的过去情况的推测，若陈述句谓语部分有“must have done”，而且有表示过去的时间状语，问句部分用didn't；若没有表示过去的时间状语，问句部分最好用haven't或hasn't 也可以用didn't如： 1)It must have rained last night didn't it?
陈述句的谓语中包括情态动词must时，疑问尾句用何种助动词，与陈述句中的整个谓语所表达的含义有关。因此，要对具体的句子做具体的分析。
1）对现在情况的推测，问句部分用助动词（do be)的一般现在时的适当形式。若是there be结构，问句用isn't/aren't there。如：
1)He must be waiting for the train isn't he?
2)She must be there isn't she?
3)There must be some students in the room aren't there?
2）对已发生的过去情况的推测，若陈述句谓语部分有“must have done”，而且有表示过去的时间状语，问句部分用didn't；若没有表示过去的时间状语，问句部分最好用haven't或hasn't 也可以用didn't如：
1)It must have rained last night didn't it?
2)They must have arrived by now haven't they?（根据by now来判断）
3)They must have been to the Great Wall haven't they?
3）must表示'应该"的意思，疑问尾句用needn't构成，如：
1)You must go home needn't you?
2)We must hand in our homework on time needn't we?
4）must表示“不得”时，疑问尾句用must构成，如：
1)We mustn't be late must we?
2)You mustn"t touch the wire must you?
5）若句中有表示过去完成时的时间状语，问句部分应用hadn't.如:
They must have learnt 5000 English words by the end of last term hadn't they?
