must have done的反义疑问句Microsoft Word 文档
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must have done的反义疑问句
2012-04-21 22:37:53| 分类:默认分类|举报|字号订阅
你好^^
情态动词+动词完成时,即情态动词+have+done.表示对过去的行为或动作进行
推测,评论或者判断.
1.must have done.
表示对过去某事的肯定猜测,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can‟t 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'/needn't
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,aren't 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,didn…t 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 have been a policeman ,wasn't 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isn't/aren't there。如:
1)He must be there,isn't he?
2)He must have a big family,doesn't he?
3)He must be waiting outside,isn't he?
4)There must be some students in the room,aren't 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didn't;若没有表示过去的时间状语,问句部分用haven't或hasn't。如:
1)They must have gone there last night,didn't they?
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?
若是被动,应按被动结构来处理。如:
1)The room must have been cleaned yesterday,wasn't it?
2)The room must have been cleaned,hasn't it?
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? (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hadn't)
希望能帮到你。嘿嘿,给我分成不成~~~~。。- -