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英语情态动词练习题含答案及解析

英语情态动词练习题含答案及解析
英语情态动词练习题含答案及解析

英语情态动词练习题含答案及解析

一、单项选择情态动词

1.I love the weekend, because I ________ get up early on Saturdays and Sundays. A.mustn’t B.needn’t

C.wouldn’t D.shouldn’t

【答案】B

【解析】

【详解】

考查情态动词。句意:我喜欢周末,因为周六周日不必早起。A. mustn’t不能,禁止;B. needn’t不必;C. wouldn’t不会;D. shouldn’t不应该。此处表示“不必”,故B项正确。

2.We’ll make the final decision on our scheme. ______ you change your mind, please inform us as soon as possible.

A.Should B.Were C.Would D.Had

【答案】A

【解析】

【分析】

【详解】

考查虚拟语气。句意:我们将对我们的计划做最后决定。如果你改变主意,请尽快通知我们。根据语境,此处用虚拟语气,表示与将来相反,从句用should+动词原形,省略if,should提前,陈述句是:If you should change your mind……。故选A。

【点睛】

虚拟语气中的倒装

当虚拟条件句中含有 were,had,should时,可以将if省略,然后将 were,had,should,移至句首:

1)If he should fail, he would kill himself.

→Should he fail, he would kill himself.

万一失败,他就会自杀。

2)If I were you, I would do it at once.

→Were I you, I would do it at once.

假若我是你,我就会马上做。

要是我能做此事,我一定会做。

3)If he had seen you yesterday, he would have asked you about it.

→Had he seen you yesterday, he would have asked you about it.

他昨天要是看到了你,他就会问你这事了。

该小题属于上述的第一种情况。should作为情态动词,有一种特殊的用法:在虚拟条件状语从句中表示与将来事实相反的虚拟语气,可以把should放在句首,即主语前,从而省略从属连词if。原来的表述为:If you should change your mind。故选A。

3.---Artistic people can be very difficult sometimes.

---Well, you______know---you married one.

A.might B.would C.shall D.should

【答案】D

【解析】

【详解】

考查情态动词词义辨析。A. might可能,也许;B. would将会;C. shall必须,会;D. should 应该。句意:---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。

4.Our English teacher is considerate,helpful,and warm-hearted,but sometimes

she________________ be angry at our silly mistakes.

A.should B.must

C.can D.shall

【答案】C

【解析】

【详解】

考查情态动词。句意:我们的英语老师很体贴、乐于助人、热心肠,但有时她可能为我们愚蠢的错误而发火。can表示一种客观的可能性,但不一定会发生,故C项正确。

5.I still find it hard to imagine that such a clever child __________ make such a foolish mistake. A.shall B.must

C.can D.should

【答案】D

【解析】

【详解】

考查情态动词。句意:我仍然难以想象这样聪明的孩子竟然犯这样愚蠢的错误。should 作为情态动词,可以用来表示意外、惊喜或者在说话人看来是不可思议的,常常译为"竟会"、"居然",这么聪明的孩子竟然犯这样愚蠢的错误。表示意外,shall表示允诺,命令等,must表示必须,can表示能力及可能性。所以答案选D。

6.My sister met him in the street yesterday afternoon, so he ______ your lecture. A.shouldn’t have attended B.couldn’t have attended

C.mustn’t have attended D.needn’t have attended

【答案】B

【解析】

试题分析:考查情态动词用法。Shouldn’t have done本不应该做某事,实际上却做了(虚拟语气);couldn’t have done不可能做某事(对过去情况的推测);needn’t have done本不需要做某事,实际上却做了(虚拟语气);句意:我的姐姐昨天下午在街上遇见了他,

所以他不可能去听了你的演讲。故B正确。

考点:考查情态动词用法

点评:考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。can’t have done 过去不可能做了某事;shouldn’t have done 本不应该做而实际做了。 need have done 本有必要做某事;needn’t have done 本没有必要做某事;注意没有mustn’t have done的形式。

7.—Where is my dictionary?I remember I put it here yesterday.

—You___it in the wrong place.

A.must put B.should have put

C.might put D.might have put

【答案】D

【解析】

【详解】

考查情态动词。句意:——我的词典在哪里?我记得昨天放在这里了。——你或许放错了地方。“might have +动词+ed形式”表示过去可能完成的动作。根据所提供的情景Where is my dictionary? I remember I put it here yesterday.可判断出把词典放在某个地方发生在过去,所以要用“might have +动词+ed形式”。“should have + 动词+ed形式”表示“(过去)本来应该做某事”。must意为“一定”,是肯定的推测,与所提供的情景的矛盾。might put表示现在发生的事。故选D。

8.It has been announced that all the students ________ put on masks before going to school in case they are infected with SARS virus.

A.shall B.will C.need D.may

【答案】A

【解析】

【详解】

【详解】

考查情态动词。句意:所有学生们应在去学校之前带上口罩以防感染非典病毒,这已经被宣布。shall用于第二、第三人称,表示说话人给对方命令、警告、允诺或威胁,故选A 项。

9.I’m sorry, but you _____ go wrong. There’s no such man here.

A.need B.can C.must D.will

【答案】C

【解析】

【详解】

考查情态动词。句意:很抱歉,但是你一定是弄错了。这儿没有这么个人。A. need需要;

B. can能够;

C. must必须;

D. will将会。must指有把握的推测,“一定;必定”,结合下文There’s no such man here.可知一定是弄错了。故选C。

10.No student ________ go out of school to have lunch without permission of the headteacher. A.might B.must

C.shall D.could

【答案】C

【解析】

【详解】

考查情态动词。句意:未经校长允许,任何学生不得离开学校去吃午饭。might可能;must一定,必须;shall会,将;could能够。本句是一条禁令。shall用于肯定句并且主语是第一、三人称时,表示允诺,警告,劝告等语气。故选C。

11.It wasn’t right to me that such near neighbors not know one another.

A.could B.would

C.should D.might

【答案】C

【解析】

【详解】

考查情态动词。句意:对我来说,很不正常,如此近的邻居居然不认识。A. could可能,能够;B. would将;C. should竟然;D. might可能,也许。should 作为情态动词,可以用来表示意外、惊喜或者在说话人看来是不可思议的,常常译为"竟会"、"居然",住的这么近的邻居居然不认识。表示意外,所以答案选C。

【点睛】

should的用法

1、should 作为情态动词,通常用来表示现在或将来的责任或义务,译作“应该”、“应当”,这时它可以和 ought to, be supposed to 互换使用.例如:You should (= ought to ) tell your mother about it at once.

2、should 作为情态动词,可以用在条件状语从句中,表示语气较强的假设,译作“万一”、“竟然”,这时也可将 should 置于从句之首,即将 should 放在主语前面,而省略从属连词 if。例如:If you should fail to come, ask Mrs Chen to work in your place. (= Should you fail to come, ask Mrs Chen to work in your place. )

3、should 作为情态动词,可以表示谦逊、客气、委婉之意,译为“可……”、“倒……”。例如:I should say that it would be better to try it again.

4、should 作为情态动词,可以用来表示意外、惊喜或者在说话人看来是不可思议的.尤其在以 why, who, how 等开头的修辞疑问句或某些感叹句中常常译为“竟会”、“居然”。例如:How should I know it ? 我怎么会知道这件事?

5、should 作为情态动词,可以用来表示有较大可能实现的猜测、推论,通常译为“可能”、“总该……吧”,相当于 be expected to 。例如:They should be home by now, I think. 我想现在他们

总该到家了吧。

6、should 作为情态动词,用在由 so that, for fear that, lest 引导的目的状语从句和 in case (that)引导的条件状语从句中,有“能够”、“可能”、“会”之意。例如:They got up early so that they should (= could/ might) catch the first bus in time.

7、should 作为情态动词,可以用于下列虚拟语气句中:

(1)用在表示与将来事实相反的条件状语从句中,构成“ If …… should (do sth)……, …… would/ could/ might (do sth.)…… ”句式。

(2) 用在 suggest (propose), arrange, plan, decide, advise, order, demand, request, desire, insist 等表示“建议”、“要求”、“命令”、“决定”、“安排”、“计划”、“主张”的动词后面接的宾语从句中。这里的 should 也可以省略。

本句中should 作为情态动词,可以用来表示意外、惊喜或者在说话人看来是不可思议的,常常译为"竟会"、"居然",住的这么近的邻居居然不认识。表示意外,所以答案选C。

12.One of our rules is that every student _______ wear school uniform while at school. A.might B.could

C.shall D.will

【答案】C

【解析】

【详解】

考查情态动词辨析。句意:我们其中一条规则要求每个学生在校期间都要穿校服。shall可以表示“命令,警告,强制要求;允诺;法律,规定要做……”,结合句意可知C正确。

13.He is a bad-tempered fellow, but he ________ be quite charming when he wishes. A.shall B.should

C.can D.must

【答案】C

【解析】

【详解】

考查情态动词辨析。句意:他是个脾气不好的家伙,但当他希望自己有魅力的时候,他可以变得相当可爱。此处表示“能、可以”,故C项正确。

14.It has been announced that all the candidates ___________ remain in their seats until all the papers have been collected.

A.shall B.could

C.would D.ought

【答案】A

【解析】

【详解】

考查情态动词用法。句意:据宣布,所有的候选人都要坐在位置上,直到所有的试卷都被

收齐。根据句意可知本句是考试规则,情态动词shall可以表示“按照规则/规定/法律要做

的事情”,符合本句语境。故A项正确。

15.Using AI, many companies are now conducting experiments that__________ possible just a few years ago.

A.would have been B.might have been

C.shouldn't have been D.couldn't have been

【答案】D

【解析】

【详解】

考查情态动词表推测。句意:很多公司现在使用人工智能进行试验,这在几年前是不可能的。根据“a few years ago”可知,此处表示“过去不可能”,应该用couldn’t have done,故D 项正确。

16.The weather turned out to be fine. I _____________ the trouble to carry the umbrella with me.

A.should have taken B.must have taken

C.couldn't have taken D.needn't have taken

【答案】D

【解析】

【详解】

考查情态动词 + have done。句意:天气转晴了。我本不必费心把伞带在身边。A. should have taken本应该做某事,而实际上没做; B. must have taken对过去发生的事情的肯定猜测;C. couldn't have taken不可能;D. needn't have taken本来不需要,故选D。

17.—I heard they went skiing in the mountains last winter.

—It true because there was little snow there.

A.may be not B.won’t be C.couldn’t be D.mustn’t be

【答案】C

【解析】

【详解】

考查情态动词辨析。句意:我听说他们去年冬天去山里滑雪。--不可能是真的,因为那里几乎没有雪。A. may be not可能不;B. won’t be 不会;C. couldn’t be不可能是;D. mustn’t be禁止。根据because there was little snow there.可知这里是否定推测,couldn’t be“不可能是”符合句意,故选C项。

18.Tom, you _____ leave all your clothes on the floor like this!

A.wouldn’t B.mustn’t C.needn’t D.may not

【答案】B

【解析】

【详解】

考查情态动词辨析。句意:汤姆,你不要把所有的衣服都这样扔在地板上! A. wouldn’t 不会; B. mustn’t 禁止;C. needn’t不需要;D. may not不可以。本句为祈使句,所以mustn’t “禁止”符合句意。故选B项。

19.—What do you think we can do for our aged parents?

—You ______ do anything except to be with them.

A.don’t have to B.oughtn’t to C.mustn’t D.can’t

【答案】A

【解析】

【详解】

考查情态动词辨析。句意:——你认为我们能为年迈的父母做些什么?——除了和他们在一起,你不必做任何事情。A. don’t have to不必;B. oughtn’t to不应该;C. mustn’t不可以;D. can’t不能。根据语境可知,此处表示客观性的必须,don’t have to…except to“除了……不必做……”。故选A。

【点睛】

have to表示客观需求时,使用have to的情况要比must多。have to受客观条件或环境迫使而“不得不”做某事,突出客观性。

must一般则表示命令或说话人主观认为必须要做某事,含强调语气,侧重主观性。有时候也使用be+不定式表示需要做某事,但语气较弱一些。如:I am to do it, whether I like it or not.

must表示客观性的需要时,一般翻译为“总是要(会)”。如:All men must die. 人故有一死。

ought to表示必须时,偏责任,推想等。如:You ought to work hard.

20.—May you live longer, grandpa!

—Thank you! It's the favorite wish I _____.

A.should have waited for B.must have waited for

C.may have waited for D.could have waited for

【答案】D

【解析】

【详解】

考查情态动词+‘have done’形式。句意:—爷爷祝您长寿!—谢谢,这是我能够等待到的最喜欢的愿望。A. should have waited for 本应该等待; B. must have waited for 一定在等待;

C. may have waited for可能已经等待;

D. could have waited for可以已经等待的。

表示可以等到的愿望用could have waited for。故选D。

【点睛】

情态动词have done不仅是高中英语教学的重点和难点,也是高考的重点。情态动词have

done有两大功能:一是表示推测;二是表示虚拟。

must have done过去一定做了某事,根据must的本意即可推敲出意思,比较好理解。

The lights were out. They must have been asleep. 灯灭了,他们应该睡觉了。

should have done本该做某事却没做,should是应该,重点记忆最后的结果是没做某事。

You should have told her that you loved her.你本应该告诉她你爱她。

could have done字面意思是可能已经做了某事,也可用作本能做却没做某事,重点记忆最后的结果是没做。

You could have reviewed, but you played games all night.你本可以复习的,但你一晚上都在玩游戏。

may have done也许已经做了某事。

21.—What’s wrong with the door?

—The key has got stuck in it and ______ come out.

A.shouldn’t B.mustn’t C.needn’t D.won’t

【答案】D

【解析】

【详解】

考查情态动词。句意:---门怎么了?---钥匙卡在里面出不来了。A. shouldn’t不应该;B. mustn’t禁止;C. needn’t 不需要;D. won’t不会。won’t表示拒绝时,其主语有时可以是“物”。故选D项。

22.—Are you going on a holiday after the exam?

—Well, I haven’t decided yet. I ________ find some other choices.

A.would B.might C.must D.should

【答案】B

【解析】

【详解】

考查情态动词辨析。句意:——考试后你要去度假吗?——嗯,我还没有决定。我可能会发现一些其他的选择。A. would将会;B. might可能;C. must必须;D. should应该。根据上文“ I haven't decided yet”可推断,我可能还有别的选择,表示可能性,might符合语境,故选B。

23.—You rang me up at about 10:00 last night, didn't you?

—No, I didn't phone you. It someone else.

A.must have been B.could be C.must be D.could have been 【答案】A

【解析】

【详解】

考查情态动词+have done。句意:“昨晚10点左右你给我打了电话,是吗?”“不,我没给你打电话。一定是别人干的。” must have done 是对过去发生的动作最有把握的猜测,意思是“一定”,结合语境可知,我没有打电话给你,因此猜测一定有别人给你打了电话。故选A 项。

24.I ______my examination easily but I made too many stupid mistakes.

A.should pass B.could have passed

C.had passed D.must have passed

【答案】B

【解析】

【详解】

考查情态动词+have done的用法。句意为:我本来能够轻松地通过这次考试的,但是我犯了太多愚蠢的错误。结合语境可知,此处考查虚拟语气,且与过去的事实相反,应用

could/would/might have done的结构,could have passed本能通过(事实上未通过),故选B项。

【点睛】

本题考查情态动词的过去式+have done的虚拟语气的用法,常见结构有should/shouldn’t have done; could/couldn’t have done/ would/wouldn’t have done/ need/ needn’t have done/ might have done

例如:

Without your help, I couldn’t have passed the test.如果没有你的帮助,我本不能通过测试。It cle ared up, I needn’t have brought the umbrella.天放晴了,我本没有必要带伞的。

25.You ________ be Carol. You haven’t changed a bit after all these years.

A.must B.can C.will D.shall

【答案】A

【解析】

【详解】

考查情态动词。句意: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。

【点睛】

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 didn’t hear the phone. I must have be asleep. 我刚才没有听到电话,我想必是睡着了。

26.You _____ be right but I’m going back to check anyway.

A.should B.must C.need D.might

【答案】D

【解析】

【详解】

考查情态动词。句意:你或许是对的,但我还是要回去核对一下。A. should应该;B. must 一定,必须;C. need需要;D. might或许。本题主要考查情态动词表示推测的用法,由I’m going back to check anyway可知,我对此不确定。由此可知,D项符合题意。故选D项。【点睛】

can / could用于表推测的用法

(1) 从使用句型上看,can 通常只用于否定句或疑问句,一般不用于肯定句,而could 可用于肯定句、否定句和疑问句。两者没有时间上的差别,只是could 比 can 更委婉,更不确定。

(2) 从时间关系看,对现在或将来情况作推测,后接动词原形;对正在进行的情况作推测,后接 be doing 结构;对过去情况作推测,后接动词完成式。

二、 may / might用于表推测的用法

表示推测,两者都可用,只是 might 比 may 语气更不确定,表示的可能性更小。如本题,根据I’m going back to check anyway可知,我对此不确定。由此可知,D项符合题意。(1) 在句型使用方面:两者均可用于肯定句和否定句,但用于疑问句时,may通常不用于句首,但可用于疑问句的句中(如特殊疑问句等),而might尽管可以用于疑问句的句首,但不算普通,通常会改用其他句式(如用could等)。

三、must表示推测的用法

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;表示对过去情况的推测,接动词完成式。

27.The principal in our school has recently passed a rule that students _______ wear school uniforms in our campus.

A.may B.should C.will D.shall

【答案】D

【解析】

【详解】

考查情态动词。句意: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 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。故选D。

【点睛】

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?如: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。如: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.”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。故选D。

28.You ________ give me a lift. I want to walk home for exercise.

A.needn’t B.couldn’t C.can’t D.mustn’t

【答案】A

【解析】

【详解】

考查情态动词。句意:你不必让我搭车。我想步行回家锻炼身体。A. needn’t不必;B. couldn’t不能;C. can’t不会;D. mustn’t禁止,不允许。根据I want to walk home for exercise.可知,你不必让我搭车。故选A。

考点:考查情态动词

29.--- Difficulties always go with me!

--- Cheer up! If God closes door in front of you, there be a window opened for you.

A.must B.would

C.could D.can

【答案】A

【解析】

【详解】

考查情态动词辨析。句意:——困难总是伴随着我!——高兴点! 如果上帝在你面前关上了门,一定有一扇窗户为你打开。A. must必须;B. would将要;C. could能,会;D. can能,会。must表示对现在的状态推测时,意为“一定”,表示可能性很大的推测。符合语境。故选A。

【点睛】

1) must用在肯定句中表示较有把握的推测,意为"一定"。

2) must表对现在的状态或现在正发生的事情的推测时, must 后面通常接系动词be 的原形或行为动词的进行式。

3) must 表示对已发生的事情的推测时,must 要接完成式。

4) must表示对过去某时正发生的事情的推测,must 后面要接完成进行式。

5) 否定推测用can't。

本句中的。must表示对现在的状态推测时,意为一定,表示可能性很大的推测。符合第2点用法。

30.--- Oh, my God! I just missed the last bus back home.

--- That’s really bad. I’m sure you ______ it, but you just didn’t hurry up.

A.had caught B.could have caught C.could catch D.can catch

【答案】B

【解析】

【详解】

考查情态动词+have done结构。句意:——哦,我的上帝!我刚好错过了回家的末班车。——这是非常糟糕的。我肯定你能赶上,但你就是不抓紧。could have done“本来能做而没有做”。故选B。

31.-- Did Jim come?

-- I don’t know. He _______ while I was out.

A.might have come B.might come

C.must have come D.should have come

【答案】A

【解析】

【详解】

考查情态动词推测用法。句意:Jim来了吗?--我不知道,在我不在的时候,可能来过。根据前文I don’t know.可知,说话者不知道Jim来没来,因此后文推测来过,但是语气很不确定,故可知选A。对过去情况的推测为情态动词+have done,must have done 一定做了某事,should have done 应该来过,不符合,故选A。

【点睛】

情态动词+have+过去分词的用法,表示推测或判断过去的情况。

can/could+have+过去分词用法:①多用于否定句和疑问句中。表示对过去某事发生的可能性的否定或质疑,意为:不可能(已经)......了-(否定句)/可能(已经)......了嘛?-(疑问句)②用于肯定句中。表示对过去没有做某事的遗憾,含有轻微的责备,意为:本来可以......的(但实际上没有......)。You could have done better, but you were too careless.(肯定句。他能做得更好的)

should/ought to+have+过去分词用法:用于肯定句中。表示对过去没有做某事的遗憾,含有责备的意思,意为:本来应该......的(但实际上没有......)。用于否定句中-表示对过去已经做了某事的责备,意为:本来不应该......的(但实际上已经......了)。He should have been asleep.(肯定句,他本应去睡觉的)He shouldn't have been asleep.(否定句,他本来不应该去睡觉的)。

may/might+have+过去分词用法:用于肯定句和否定句中,表示对过去发生某事的可能性的推测,意为:或许(已经)....../或许还没有......。It is too late. He may have gone to bed. must+have+过去分词用法:表示对过去发生的事情十分肯定的推测。must表示推测时,不

能用在否定句和疑问句中。I must have forgotten to tell you.(must 的引入,表达了说话者对过去忘记告诉你的这件事肯定推测)

needn't+have+过去分词

用法:表示对过去已经做了某事的后悔,意为:本来可以不必......的(可实际上却已经......)You needn't have taken a taxi here, for it was very near to my home.

32.— Excuse me, could you please tell me how to get to the nearest Wenfeng Supermarket?—OK, It’s two blocks straight ahead. You ________ miss it.

A.can’t B.mustn’t

C.needn’t D.wouldn’t

【答案】A

【解析】

【详解】

考查情态动词。句意:——劳驾,你能告诉我最近的Wenfeng Supermarket怎么走吗?——好的,一直往前走两个街区就到了。你不会错过的。A. can’t不可能;B. mustn’t禁止,不允许;C. needn’t不必;D. wouldn’t不会。故选A。

33.They were abroad during the months when we were carrying out the investigation, or they __________to our help.

A.would have come B.could come

C.have come D.had come

【答案】A

【解析】

试题分析:本句考查的是一个含蓄的虚拟条件句,句中的or相当于if they had not gone abroad.因为前面句中使用的是were,说明这个虚拟语气是与过去事实相反,所以主句中使用的是“情态动词+have done”的形式。句意:当我们在做调查的那几个月里,他们一直在国外,否则的话他们早就来帮助我们了。故A正确。

34.—Tony _______ what I did annoying though he didn’t say anything.

—So you think you will have to make an apology?

A.could find B.should have found

C.might find D.must have found

【答案】D

【解析】

【详解】

考查情态动词+have done。句意:—Tony一定觉得我做的事很烦人,尽管他什么也没说。—所以你认为你得道歉吗?。由“what I did”可知,此处是对过去事情有把握的推测,must have done“一定是做某事了”。故选D项。

【点睛】

情态动词+ have done结构:

1.“must + have + 过去分词”表示对过去发生的事情或状态进行推测,语气比较坚定,通常只用于肯定句.如:It must have rained last night,for the ground is wet.

2.“can / could + have + 过去分词”表示对过去某种情况的怀疑或不确定.can和could一般用于否定句和疑问句,could的语气较can弱.如:He can't have finished the work so soon.

3.“may / might + have + 过去分词”表示对已发生的动作或存在的状态进行不肯定的推

测,might的语气比may弱一点.这种结构主要用于肯定句和否定句,疑问句改用can或could.如:They may not have known it beforehand.

4.“need + have + 过去分词”表示过去做了不必做或不需要做的事情,或过去做某事纯属多余.如:I needn't have bought so much wine—only five people came.

5.“should / ought to + have + 过去分词”表示过去本该做某事但没做,其否定式表示过去不该做某事但做了,这种句式含有不满或责备之意,ought to的语气比should强一些.如:

You ought to / should have studied harder.你本应该更努力学习的.(但没有)

He oughtn't to / shouldn't have done that.他本来就不该做那件事.(可是做了)

6.“would + have +过去分词”表示对过去的某种情况进行猜测,或本来要做某事却因某种原因未做成,通常用来说明某一情况,但不像用should或ought to那样含有责备之意.如:

I guess the poet would have been about twenty when she wrote her first poem.

Another worker wouldn't have acted like that.

分析句子可知,由“what I did”可知,此处是对过去事情有把握的推测,must have done“一定是做某事了”。故选D项。

35.I ______ worry about my weekend—I always have my plans ready before it comes. A.can’t B.mustn’t C.daren’t D.needn’t

【答案】D

【解析】

【详解】

考查情态动词。句意:我没有必要担心我的周末,我总是在周末到来之前做好计划。A. can’t 不可能;B. mustn’t禁止;C. daren’t不敢; D .needn’t没有必要。由“I always have my plans ready before it comes ”可知,needn’t “没有必要” 符合句意。故选D。

36.The door ________ open, no matter how hard she pushed.

A.shouldn’t B.couldn’t

C.wouldn’t D.mightn’t

【答案】C

【解析】

【详解】

考查情态动词。句意:无论她怎么使劲推,门就是打不开。A. shouldn’t不应该;B. couldn’t 不能够;C. wouldn’t不愿意;D. mightn’t可能不。will及其过去式would均可表示一种倾向

性、习惯。故选C。

37.My computer ________ start this morning. There must have been something wrong with it. A.wouldn’t B.shouldn’t C.couldn’t D.mustn’t

【答案】A

【解析】

【详解】

考查情态动词。A. wouldn’t 不会;B. shouldn’t不应该; C. couldn’t 不能; D. mustn’t禁止,不允许。句意:我的电脑今早启动不了。一定是出了什么问题。此处would表示过去的习惯或反复性的动作。故选A。

38.—Life ____ be very hard for people living in the north of Canada as it is very cold there in winter.

—Yes, the weather there _____ be as low as 60℃ below zero.

A.must; can B.shall; must C.will; should D.has to; can

【答案】A

【解析】

【详解】

考查情态动词。根据句意:——对于生活在加拿大北方的人来说生活肯定很艰难,因为冬天那儿很冷。——是的,那儿的天气可能会达到零下60度。must表肯定推测,意为“肯定,一定”,can表客观上的可能性,意为“可能”。根据语境及选项可知,A选项正确。故选A。

39.—I phoned you yesterday morning. A girl answered, but I didn’t recognize the voice.—Oh, it ________ my younger sister. She was in my room at that moment.

A.must have been B.should have been

C.could have been D.may have been

【答案】A

【解析】

【详解】

考查情态动词。句意:—昨天上午我给你打电话。一个女孩回答的,但我没听出谁的声音。—哦,那一定是我妹妹。她那一刻正在我的房间里。情态动词加动词的现在完成式形式,表示对过去的推测。A. must have been表示一定做了某事。用于肯定推测;B. should have been 本应该,表示应该做而没有做某事。C. could have been用于肯定句时,表示可能做了某事。更常用于否定推测;D. may have been可能做过某事。表示可能性很小。结合语境判断,表示非常肯定的推测,故选A。

40.No driving after drinking is a rule that every driver ____________ obey in our country. A.will B.shall

C.may D.can

【答案】B

【解析】

试题分析:考察情态动词。A. 将要 B.将要 C.可能D.可以。Will 表示请求、建议、意志、愿望和决心。Shall用于第二、第三人称,表示说话人给对话的命令、警告、允诺或威胁。May表示请求和允许;用于祈使句表示决心;表示推测、可能性。Can表示能力;请求和允许。句意:酒后驾车是每一位驾车者在我们国家应当遵守的规则。故选B。

考点:考察情态动词

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常见情态动词: 情态动词有can (could), may (might), must, have to, shall (should, will (would), dare (dared), need (needed), ought to等。 情态动词的基本用法: 一、can, could 1) 表示能力(体力、知识、技能)时,等于be able to 。 a)Can you lift this heavy box?(体力) b)Are you able to lift this heavy box? c)Mary can speak three languages.(知识) d)Is Mary able to speak three languages? e)Can you skate?(技能) 此时可用be able to代替。 2) can表示请求和允许。 -----Can I go now? ----- Yes, you can. / No, you can’t. 此时可与may互换。在疑问句中还可用could, might代替,不是过去式,只是语气更委婉,不能用于肯定句和答语中。(特别注明:这是在表示请求和允许的时候。) ---- Could I come to see you tomorrow? ---- Yes, you can. (No, I’m afraid not. ) can't在否定句中可以表示命令,不允许,但是语气比mustn't弱,具有劝慰的意思. 3)can表示“有时会”: A kind person can lose temper sometimes. 4)表示与五种感官和知觉的动词连用。 I can hear/ see you clearly from here. You can imagine how annoyed she was ! 2 / 17

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初中英语情态动词的基本用法讲解

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