must反义疑问句(3页).doc

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1、-must反义疑问句-第 2 页Must相关的反义疑问句反义疑问句最大最主要考点1.must have done. 表示对过去某事的肯定猜测，翻译成: 准是一定其否定或疑问形式都用can/could来表示。 例如：since the road is wet,it must have rained last night. 2；当然对现在发生或者将来发生的事情，要用must do表示猜测，否定为cant do he must understand that we mean business. You must be hungry after a long walk. 反意疑问句中含有Must的情况

2、主要有以下几种： 1）作为情态动词表“必须”，这时反意疑问句直接用mustn/neednt 2)当must表示推测时又分以下几种情况： a：对现在事实的推测，反意疑问句与must后面的动词呼应，如: You must be joking,arent you ? b:对过去事实的推测，表示动作的时候用did 当助动词，表示状态时用was，如： Mr Green must have been punished for his being rude at the meeting，didnt he ?(格林先生一定因为昨天在会上鲁莽的行为被处罚了，是吗？） 被处罚表示一个动作 She must hav

3、e been a policeman ,wasnt she ?（她过去一定是个警察，是吗？） 是警察表示一种状态 对现在情况的推测，问句部分用主动词（do, be)一般现在时的适当形式。若是现在进行时，问句部分用现在进行时的适当形式表示。若是there be结构，问句用isnt/arent there。如： 1)He must be there, isnt he? 2)He must have a big family, doesnt he? 3)He must be waiting outside, isnt he? 4)There must be some students in the

4、room, arent there? 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didnt；若没有表示过去的时间状语，问句部分用havent或hasnt。如： 1)They must have gone there last night, didnt they? 2)They must have arrived by now, havent they?（根据by now来判断） 3)They must have been to the Great Wall, havent they? 若是被动，应按被动结构来处理。如： 1

5、)The room must have been cleaned yesterday, wasnt it? 2)The room must have been cleaned, hasnt it? 若句中有表示过去完成时的时间状语，问句部分应用hadnt.如: They must have learnt 5000 English words by the end of last term, hadnt they? (本题中must表推测，如果将它去掉，还原为真实句就是They had learnt 5000 English words by the end of last term.因此，反意问句是hadnt）