1、can have done较少使用此结构,表示对过去行为的怀疑;用于疑问句时意为“难道真的做了吗”,表示怀疑;need have done需要做某事,实际上却未做(表示虚拟语气);must have done一定做了某事(表示对过去发生的事情的肯定推测);might have done表示对发生过的事情的推测,意思是“可能已经”或“也许已经”,用于肯定句中。故D正确。【点睛】本题是高考必考考点,一定要牢记句型意思。must have done过去肯定做了某事。should have done本应该做而实际未做。cant have done过去不可能做了某事;shouldnt have done
2、 本不应该做而实际做了。need have done本有必要做某事而没做;neednt have done本没有必要做某事;注意没有mustnt have done的形式。2He _ writing the paper now. He hadnt written a single word when I left him ten minutes ago.Ashouldnt be Bcant have finishedCcant be Dmustnt have finished【答案】B考查推测句。他现在不可能写完了卷子。我十分钟之前留下他时,他还没有写一个字。根据句意可知,此处考查对过去情况的
3、否定推测,其表达为cant have done不可能做某事,故选B项。本题考查推测句对过去情况的肯定推测是must have done对过去情况的否定推测是cant/couldnt have done例如:The ground is wet, so it must have rained last night.He cant have finished his work, because he played basketball all day yesterday.3According to a newly released regulation on online video service
4、s, no one _ generate, release or spread fake news or information by using such technologies.Acan Bshall Cwill Dmay考查情态动词。根据最新发行的关于网络视频服务的规章,任何人都不可以使用此类技术生成、发行或者传播虚假消息。A. can 能够,有时会;B. shall 一三人称表示征求对方意见; 二三人称陈述句,表示允诺、威胁、恐吓或法律条文的规定。C. will 意愿;D. may 也许,可能。根据前面的regulation(规定)可知,本题选shall更加合理。故选B。4If we
5、 had paid enough attention to the issue of the heavily-overloaded vehicles, the tragedy of the collapse of an overpass in Wuxi _ avoided.Ashould Bcould be Cshould have been Dcould have been考查情态动词用法。如果我们对超载车辆问题给予足够的重视,就可以避免无锡立交桥垮塌的悲剧。本句为“情态动词+have done”结构,结合句意表示“本来可以;本来能够”应用could have done结构,且主语与谓语动词
6、avoid构成被动关系,故应用be done形式。故选D。情态动词+have done的结构和用法有以下几种:一、must have done sth.“一定做了某事”。表示对过去事情的较有把握的推测,这时只能用在肯定句中,“肯定/必须已经干过”,在否定句和疑问句中用cant或couldnt或can/ could,例如:1.From what you said, she must have told you all about it. 从你的话看,她一定告诉了你所有的事情。二、can/could have done sth.本来能够做某事,而实际上未做;1.But we could have
7、done it all so much better. 但是,我们本可以把这一切做得更好。三、cant/couldnt have done sth.不可能做过某事;1. We couldt have done it without you.没有你我们办不成这事。四、ought to/should have done sth.过去本应该做某事而实际上并没有做。You should have done it when you first saw them blooming this spring. 你应该在今年春天第一次看到它们盛开的时候就挖一些的。2.Even if its something
8、you should have done earlier in the week or missed a detail on.甚至你在一个星期前的就提早完成了一件事或者忽略了一个小细节。5Most of the top leaders expressed a common desire at the UN conference, _ that different cultures _ coexist with tolerance.Athe one ; must Bthe one ; should Cone ; must Done ; should考查替代和情态动词。大多数高层领导人在联合国大会
9、上表达了一个共同的愿望,即不同的文化应该与宽容共存。替代表泛指的单数名词,通常用one替代。此处用one替代前面的a desire,是同位语;结合句意第二空用情态动词should“应该”。that ,it ,one 代指前面的名词时的用法1.one 指代前面出现的可数名词,是泛指。可以和冠词连用,也可以有自己的定语。一般不能用做特指,但和定冠词连用时可以是特指。如: Please show me the cup, the red one on the shelf. 2.It 指代前面提到的单数名词,相当于the one。当one是泛指的时候,指的是同名异物,it是指同一物体.如: -Do yo
10、u want the cup ? -Yes ,I want it. 3.that通常用来代替前面出现的可数名词不可数名词,主要是用来避免重复。 The weather of Guangzhou is hotter than that of Beijing.6Students _ remain in their seats until all the papers have been collected according to the regulation.Awould Bshall Cwill Dcould学生们必须呆在自己的座位上,直到所有的试卷都被收回。根据句意,“学生们呆在自己的座位上
11、”是一项规定。shall 可表示某种规定或义务,用于第二、三人称的句子中。而其他情态动词无此用法。故正确答案为B。7You _ be Carol. You havent changed a bit after all these years.Amust Bcan Cwill Dshall【答案】A你肯定是卡罗,这些年你一点也没有变化。must表示对现在的肯定推测;can表示推测,表示可能性;will表示意愿;shall表示表示决心、命令或指示。根据下文“这些年你一点用没有改变”可知,前文表示肯定性推测。故选A。must表推测的用法must表示很有把握的推测,其意为“一定会”“肯定会”,只用于肯
12、定句,一般不用于否定句或疑问句。表示对现在或未来的情况作推测,后接动词原形。You have worked hard all day. You must be tired. 你辛苦一整天,一定累了(对现在情况的推测判断)I didnt hear the phone. I must have be asleep. 我刚才没有听到电话,我想必是睡着了。8-Artistic people can be very difficult sometimes.-Well, you_know-you married one.Amight Bwould Cshall Dshould考查情态动词词义辨析。A. m
13、ight可能,也许;B. would将会;C. shall必须,会;D. should应该。-有艺术修养的人有时很难相处。-你应当知道这一点,因为你结婚那位就是搞艺术的。这里是按照常理推断,用should。9The principal in our school has recently passed a rule that students _ wear school uniforms in our campus.Amay Bshould Cwill Dshall我们学校的校长最近通过了一项规定,要求学生在校园里穿校服。分析句子可知,“that students _ wear school
14、uniforms in our campus.”是同位语从句对名词“rule”内容解释说明。当表示强制,用于法令、条约、规章中,意为“必须,应该”等时句子用情态动词shall。情态动词shall的用法:1、在主语是第一、三人称的疑问句中征求对方意见:要不要?好吗?Shall we go?该走了吧?2、用于二、三人称,在陈述句中表示说话者给对方的承诺、决心、警告、威胁等。You shall borrow the book。你可以借这本书。3、表示强制,用于法令、条约、规章中,意为“必须,应该”。例如本小题,分析句子可知,“that students _ wear school uniforms in our campus.
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