1、外研社八年级上学期期末复习 查缺补漏冲刺满分(重点知识+难点易错点)专题07 重点语法情态动词考点一can的用法can的基本意思是“能,会”,其过去式是could,其用法为:1.表许可,相当于mayEg:CanIhelpyou?2.表能力,可以和beableto相互转换;(区别:beableto可以有多种时态和人称的变化,而can无人称变化,在时态上can只有一般现在时和过去时的变化。)Eg:HecanspeakFrench.=HeisabletospeakFrench.3.表示怀疑,猜测,主要用于否定句和一般疑问句中;Eg:TheboycantbeTom.Tomhasgonehome.Can
2、itbetrue?4.could为can的过去式,可以表示过去的能力;could用在问句中表示委婉请求,不表示过去;Eg:Hecouldswimattheageoffive.CouldIuseyourdictionary?考点二may的用法1.表请求,许可,意为“可以”,can也有这种用法;Eg:MayIcomein?Youmaykeepthebookfortwodays.2.表示不确定的推测,意为“可能,或许”,常在肯定句中;Eg:ThatgirlmaybeLucy,butImnotsure.3.表示祝愿;Eg:Mayyousuccess.注意:1.might是may的过去式,但它并非完全表
3、示过去,用于现在时的肯定句表示可能性比较小,意为“或许”,语气比may还弱。Eg:Hemightcome,butImnotsureatall.2.can与may都可以表示可能性,但在肯定句中用may而不用can;在疑问句中can不用may;在否定句中cant表示“不可能”,用maynot表示“可能不”。考点三must的用法1.表示“必须,应该”;Eg:Wemustobeythetrafficrules.2.表示推测,意为“一定”,用于否定句中,在疑问句和否定句中一般应用cant。Eg:ThebookmustbeLucys.Look!Hernameisonthecoverofthebook.3.
4、在否定句中,mustnt表示禁止,意为“不允许”。Eg:Youmustntcrosstheroadwhenthetrafficlightsarered.考点四shall/should/will/would的用法1.shall在问句中表示征求对方意见,主要用于第一,第三人称;Eg:Shallwegoswimmingnow?2.should常用于表示义务,责任,意为“应该”;Eg:Weshouldobeytheschoolrules.3.will用于第二人称,表示询问,请求,也可表示现在的“意愿”。Eg:Willyoupassmethedictionary?Wewilldoanythingfory
5、ou.(will意为“愿意”)4.would用来表示过去的意愿,也可以用来表示更加委婉的询问和请求,比will更加客气和委婉。Eg:Wouldyoutellmethewaytothestation?1The little boy spoke in such a low voice that her mother _ hardly (几乎不) understand what he said.AmustBcouldCmightDshould2You _ stop _. You look tired.Awould better; to workBwould better; workingChad b
6、etter; workingDhad better; to work3Must we finish the work in a month?No, you _.AmustntBneedntCcantDdont4Must I park my car behind the building?No, you _. You _ park it there.Amustnt; mayBshouldnt; mustCdont have to; may5Weve got everything ready for the picnic. Do you mean I _ bring anything with m
7、e?AcantBneedntCcouldntDmustnt6Must I finish my homework this afternoon, Mum?No, you _. You can go and have a rest now.AmustntBneedntCshouldntDcant7_ I come back before 11:00? No, you _. But you cant be back later than lunch-time.ACan; cantBMust; needntCNeed; mustntDMay; neednt8As a teacher, you _ be
8、 patient as you need to teach the students well.AwouldBcanCshouldDmay9The epidemic (疫情) is serious again now. Youd better _ around for the moment.AtravelBnot to travelCdont travelDnot travel10I will help you, so you _worry about it.Adont needBneednt toCnot needDneednt11Mike, I cant stop playing comp
9、uter games.For your health, my dear friend, Im afraid you _.Ahave toBmayCmustntDneednt12There arent enough chairs. Would you please _ ones here? OK.Ato bring another threeBbring more threeCto take three moreDbring three more13The magazine _ Lilys. Lets go and ask her.AmaybeBmay beCmust beDshould be1
10、4The woman over there looks like our English teacher.It _ be her. She is having a meeting in Hangzhou now.AcantBmustntCshouldntDneednt15 Mum, why do have to wash hands so many times a day? For your health, you _ be too careful.AcantBshouldntCmustntDneednt16Will David join us? He _ come. You know, he
11、 changes his mind so often.AshouldBneedCmayDmust17Youd better _ football on the road.Anot to playBnot playCnot playingDnot to playing18My little brother _ speak English because he is only six months old.AcantBmustntCshouldntDneednt19 I think it will be sunny tomorrow. It _ be fine. But the weather a
12、lways changes quickly.AmayBmay notCmustDmust not20Do you have any plans for this Sunday?Im not sure. I _ go to the zoo with my best friend.AcanBmayCmustDshould21The light is on. Carol _ in the room.I guess so. _ hes watching TV now.Amaybe;May beBmay be;May beCmay be;MaybeDmaybe;Maybe22_ I finish my
13、homework now?No, you _. Your work is over today.ACant; mustBMust; dont have toCMay; couldntDCouldnt; could23You dont look well. I think you _ stop to take a break.AshouldntBshouldCwouldntDwould24look! It _ be David in the classroom.It _ be him, because I saw him in the library a moment ago.Amay; mus
14、tntBmust; cantCcan; cantDmustnt; can25 I saw Tom in the playground just now. It _ him. He has gone to Beijing on business.Amay not beBcant beCmust beDshouldnt be26We _ keep quiet in the library.Yes, I agree with you. And we _ bring our student cards every time.Amust; mustntBhave to; mustntCmust; don
15、t have toDhave to; mustnt27It seems that it is going to rain. You should _ the windows _ when you leave your house.Aleave; openBnot leave; openedCnot to leave; openDnot leave; open28Must we return the book to the library today?No, you _ .You can _ it for two weeks.Amustnt; keepBmustnt; lendCneednt;
16、keepDneednt; borrow29I dont care what people think.Well, you _. You are not alone in the world.AcanBshouldCmayDwill30 _ you go to the movies with me tomorrow, Bob?Sorry. I _ go to see my grandparents.ACan; canBCan; mustCMay; mustntDMight; can31 They _ be leaving for Yunnan next month. But Im not sur
17、e. We can ask your father about it.AcanBmustCmightDshould32I dont know what _ if I do that.I think you _ tell him the whole thing first.A happens; shouldBhappens; shouldntCwill happen; shouldDhappened; shouldnt33My classmate is jumping so far! I _ believe my eyes.AshouldntBneedntCmustntDcant34Gina h
18、as the flu and she _ go to the doctor.AshouldBcanCmayDmustnt35You _ be more careful, or you will do it again. OK, I see. Thank you.AmightBcanCmayDshould36Mum, must I stay there the whole day?No, you _. You _ come back after lunch, if you like.Amustnt; canBneednt; mustCneednt; mayDmustnt; might37Woul
19、d you come to my birthday party tomorrow evening?Im afraid I _. I have to look after my grandparents.AwouldntBcantCwontDmustnt38Now most young people like shopping online so they _ spend a lot of time going from shop to shop.AneedntBcantCmustntDshouldnt39Its said that nuclear power will be used to p
20、roduce electricity in Xianning.However, nuclear power _ be very dangerous.AcanBneedCmustDshould40It is cold today. You _ put on your clothes.AshouldBwouldCshouldntDmustnt41Sorry, I _ go shopping with you yesterday afternoon. Because I was too busy.AcouldBcouldntCam able toDcouldnt able to42What will
21、 the weather be like tomorrow?It_ be rainy, cloudy or sunny. Who knows?AmustBmightCshouldDcant43Anna, you always get better grades than your sister. I think you _ help your sister more. OK, Mom.AmayBcantCshouldDmay not44Must I clean my bedroom now?No, you _. You _ clean it after finishing your homew
22、ork.Acant; canBmustnt; mayCneednt; mustDneednt; can45The lake is said to be dry. Is that true?It _. Look, some kids are swimming in it.Amust be trueBcant be trueCneednt be trueDmustnt be true46Look, its cloudy. Take an umbrella with you, it _ rain.AmightBneedCcanDshould47Im leaving now.Its rainy. Be
23、tter stay here. Call a taxi if you _.AwillBmayChave toDcould48 I cant find my new watch! What should I do? Dont worry. You _ leave it at home.AcanBneedCmayDshould49If we dont protect nature, some wildlife _ die out in the future.AneedBmayCmustDcould50You look quite tired. Youd better _ a rest.Astop
24、to haveBto stop to haveCstop havingDto stop having51Ill play baseball, because it can _.Ato build me upBto build up meCbuild up meDbuild me up52Must I finish my homework before I go home? No, you _. But you _ finish it before tomorrow.Amustnt; mustBneednt; mustCmust; mustntDneednt; mustnt53 Must I c
25、ome back before 12 oclock? No, you _. You _ stay there for a day.Aneednt; mustBneednt; canCmustnt; mustDmustnt; may54 Will humans live on other planets? It _ be true. Its hard to predict the future.AmayBneedCmustDshould55History _ repeat itself.Aneeds notBneed notCdoesnt needDneed not to56Youd bette
26、r _ at home all day. Going out and keeping _ can help you live more healthily.Anot stay; to exerciseBnot to stay; to exerciseCnot stay; exercisingDnot to stay; exercising57 How many points can you get in the coming English exam, dear? Sorry, Im not sure. I _ be able to get over 90.AmustBhad betterCm
27、ayDshould58He _ be in the classroom now. I saw him reading magazines in the library just now.AmustBneedCcantDmay59Have you heard about the temperature of the earth will rise to 45 in 2020?Dont worry! The news _ be true.Amust notBneedntCmay notDwill not60You _ pay to get into the concert. Its free.Ac
28、antBmustCmightDdont have to 试卷第7页,共8页学科网(北京)股份有限公司学科网(北京)股份有限公司参考答案1B【详解】句意:小男孩说话的声音很小,她的母亲几乎听不懂他说什么。考查情态动词。must必须;could能够;might可能;should应该。固定短语could hardly do sth.“几乎不能做某事”,故选B。2C【详解】句意:你最好停止工作。你看起来很累。考查had better和stop的用法。固定短语had better do sth.“最好做某事”,stop doing sth.“停下来正在做的事情”,stop to do sth“停下来去做
29、另一件事”,根据“You look tired.”可知应是你最好停下来现在做的事情,故选C。3B【分析】【详解】句意:我们必须在一个月内完成这项工作吗? 不,你们不必。考查情态动词。mustnt禁止;neednt不需要;cant不能;dont不。根据“Must we finish the work in a month?”可知,此处是Must开头的一般疑问句,否定回答用neednt或dont have to。故选B。4C【详解】句意:我必须把车停在大楼后面吗?不,你不必。你可以把车停在那儿。考查情态动词。mustnt禁止;may可以;shouldnt不该;must必须;dont have to
30、不必。以“Must”开头的一般疑问句,否定回答中用dont have to,第二空表示可以停在那儿,用may。故选C。5B【详解】句意:我们已经为野餐做好了一切准备。你的意思是我不需要带任何东西吗?考查情态动词。cant不能;neednt不需要;couldnt不能;mustnt不允许。根据上句说已经准备好了一切,可推测说话者的意思是不需要带任何东西了。故选B。6B【详解】句意:妈妈,我必须下午就完成作业吗?没必要。你可以现在去休息一下。考查情态动词。mustnt禁止;neednt没必要;shouldnt不应该;cant不可以。用must提问,否定回答应该用neednt/dont have to
31、表示“没必要”,故选B。7B【详解】句意:我必须在11点之前回来吗?不,没必要。但你不能晚于午餐时间回来。考查情态动词。can可以,表请求,cant意为“不行”;must必须,其否定回答用neednt,意为“没必要”;need需要,其否定回答用neednt;mustnt意为“禁止”;may可以,表请求,其否定回答用cant或mustnt。根据后文“But you cant be back later than lunch-time”可知,是没必要在11点前回来,故选B。8C【详解】句意:作为一名教师,你应该有耐心,因为你需要教好学生。考查情态动词辨析。would将要;can可能;should应
32、该;may可能,作为一名教师因为要教好学生,所以应该有耐心,故选C。9D【详解】句意:现在疫情又严重了。你这段时间最好不要四处游玩。考查固定搭配。根据空前“Youd better”可知这里用的是短语had better (not) do sth.。故选D。10D【详解】句意:我会帮助你的,因此你不需要担心它。考查情态动词。need可以作实意动词,常用于need to do sth.“需要做某事”,否定形式应用助动词do的形式构成;need也可以作情态动词,后跟动词原形,否定形式直接在need后加not。A选项缺少to;B选项多了to;C选项形式错误。故选D。11A【详解】句意:迈克,我不能停止
33、玩电脑游戏。为了你的健康,我亲爱的朋友,恐怕你不得不(停止打游戏)。考查情态动词。have to不得不;may可能;mustnt禁止;neednt不需要,根据前面的“I cant stop playing computer games”和“For your health, my dear friend”可知,应该是恐怕你不得不(停止打游戏),故选A。12D【详解】句意:这里的椅子不够。请你再去拿三把椅子到这里来好吗?好的。考查情态动词和数词。题干Would you please中的would为情态动词,后接动词原形,即Would you please do sth.表示委婉的请求“你可以做某事
34、吗”,排除选项A和C;表示“再/又几个”的结构是“基数词+more”或“another+基数词”,因此本题中应使用three more。故选D。13B【详解】句意:这本杂志可能是Lily的。让我们去问她吧。考查情态动词。maybe可能,或许;may be可能是;must be一定是;should be应该是。根据“ Lets go and ask her.”可知,不确定这本杂志是不是Lily的。故选B。14A【详解】句意:那边那个妇女看起来像我们的英语老师。不可能是她。她现在正在杭州开会。考查情态动词。cant不可能;mustnt禁止;shouldnt不应该;neednt不必。根据“She i
35、s having a meeting in Hangzhou now”可知,她现在正在杭州开会,因此有把握推测那边的那个妇女不可能是她,故选A。15A【分析】【详解】句意: 妈妈,我为什么一天要洗这么多次的手呢? 为了你的健康,你再小心也不为过。考查情态动词。cant不可以;shouldnt不应该;mustnt禁止;neednt不需要。根据固定搭配“再也不为过:cant be too adj.”可知,此空cant符合句意。故选A。16C【详解】句意:大卫会加入我们吗?他可能会来。你知道的,他经常改变主意。考查情态动词。should应该;need需要;may可能;must必须。根据“he cha
36、nges his mind so often”可知,说话人不确定大卫会不会来,因此用may表示“可能”符合语境。故选C。17B【详解】句意:你最好不要在路上踢足球。考查情态动词。had better最好,是情态动词,后接动词原形。youd better not do sth表示 “你最好不要做某事”。故选B。18A【分析】【详解】句意:我的小弟弟不会说英语因为他仅仅六个月大。考查情态动词。cant不会, 不可能;mustnt禁止;shouldnt不应该;neednt不必。根据“ he is only six months old”可知,弟弟只有六个月大,所以应该是不会说英语。故选A。19A【详
37、解】句意:我觉得明天会是晴天。天气可能不错。但是天气总是变化很快。考查情态动词辨析。may表示可能、也许;may not可能不会;must表示必须;must not禁止。根据题干中“But the weather always changes quickly.”可知,明天天气“可能”不错,但是天气总是变化很快。故选A。20B【详解】句意:这个星期天你有什么计划吗?我不确定。我可能和最好的朋友去动物园。考查情态动词。can能够,表能力或许可;may可能,表推测;must必须,强调主观意愿;should应该,表建议。根据回答“Im not sure”可知不确定,设空处用may表猜测,故选B。21C
38、【详解】句意:灯亮着。Carol或许在房间里。我猜也是。或许他现在正在看电视。考查词义辨析。maybe或许,副词;may be或许,情态动词+动词原形。第一空缺少谓语动词,应填情态动词may+动词原形be。第二空位于句首作状语,应填副词maybe,故选C。22B【详解】句意:我必须现在完成作业吗?不,你不必。你今天的工作结束了。考查情态动词辨析。cant不能,表能力或许可;must必须,强调主观意愿;dont have to不必;may可以,表许可;couldnt不应该;could应该。结合语境可知,must开头的一般疑问句,其否定回答用neednt或dont have to,故选B。23B【
39、详解】句意:你看起来不太好。我想你应该停下来休息一下。考查情态动词。shouldnt不应该;should应该;wouldnt不会;would将。根据“You dont look well.”可知,此处是建议应该停下来休息一下。故选B。24B【详解】句意:看!肯定是大卫在教室。不可能是他,因为我刚才还看见他在图书馆。考查情态动词。may可能;mustnt禁止;must肯定;cant不可能;can可能,能够。根据语境,可知第一空表示肯定推测,用must;根据后文“because I saw him in the library a moment ago”,可知第二空表示否定推测,用cant。故选B
40、。25B【详解】句意:我刚才看见汤姆在操场上。不可能是他。他去北京出差了。考查情态动词。may not be可能不是;cant be不可能是;must be一定是;shouldnt be不应该是。根据后文“He has gone to Beijing on business”(他去北京出差了)可知,操场上的人不可能是汤姆。故选B。26C【详解】句意: 我们必须在图书馆保持安静。是的。我同意你的看法。我们不需要每次带学生卡。考查情态动词。must必须;mustnt不准,禁止;dont have to不必要;have to不得不,强调客观;根据“We.keep quiet in the libra
41、ry.”及常识可知,在图书馆必须保持安静,且是强调主观意愿上的必须,应用must;结合“bring our student cards every time”可知,没有必要每次都带学生卡,应用dont have to,故选C。27D【详解】句意:看来要下雨了。你离开家时应该不要让窗户开着。考查词义辨析。leave是动词,意为“留下,使某种状态”,open是动词,意为“打开”,也可作形容词,意为“开着的”。should是情态动词,后接动词原形,根据“It seems that it is going to rain.”可知看来要下雨了,可推测出此处是“你离开家时应该不要让窗户开着”,所以用“no
42、t leave”。第二空用形容词作宾语补足语。故选D。28C【详解】句意:今天我们必须把这本书还给图书馆吗?不,你们不必,你们可以保存它两周。考查情态动词和动词。mustnt禁止;neednt不必;keep保存;lend借出;borrow借入。根据“Must we return the book to the library today?”和“No”可知,对must的疑问句进行否定回答要用neednt;再根据“for two weeks”是一段时间,要用延续性动词keep。lend与borrow是非延续性动词,故选C。29B【详解】句意:我不在乎别人怎么想。嗯,你应该。你不是独自在这个世界上。
43、考查情态动词辨析。can能够;should应该;may可能;will将。根据“Well, you. You are not alone in the world”可知,这是一个劝告对方的话,填“should”符合语境,故选B。30B【详解】句意:鲍勃,你明天能和我一起去看电影吗?对不起。我必须去看我的祖父母。考查情态动词。can能够,可以;must必须;may可能;mustnt禁止;might可能。根据“Sorry.”可知此处是邀请对方一起看电影,第一空用Can;拒绝之后要说出必须做的事情,第二空用must。故选B。31C【详解】句意:他们可能在下个月去云南。但我又不确定。我们可以去问问你的爸
44、爸关于这事。考查情态动词。can能; must必须;might可能;should应该,根据后面的“But Im not sure”可知表示的是“可能”,故选C。32C【详解】句意:假如我那样做我不知道会发生什么。我认为你应该先把整个事情都告诉他。考查动词时态辨析。前一句是if引导的条件状语从句,主句用一般将来时,从句用一般现在时;后一句是宾语从句,结合语境可知第二空表建议,需用should,故选C。33D【分析】【详解】句意:我的同班同学跳得这么远!我无法相信我的眼睛。考查情态动词辨析。shouldnt不应该;neednt不需要;mustnt禁止;cant不能。根据“My classmate
45、is jumping so far!”可知,本句是根据客观事实作出的判断,因此cant符合句意,表示“我无法相信我的眼睛”。故选D。34A【详解】句意:Gina得了流感,她应该去看医生。考查情态动词。should应该;can能;may可能;mustnt表禁止,根据前面的“Gina has the flu”和后面的“go to the doctor”可知,应该是她应该去看医生,故选A。35D【详解】句意:你应该要更加细心,否则你要再做一次。好的,我明白了,谢谢。考查情态动词。might可能(may的过去式);can能,会;may可能、也许;should应该;根据语境可知此处指“应该更仔细”;故选
46、D。36C【详解】句意:妈妈,我必须一整天都待在那儿吗?不,你没必要。如果你愿意,午饭后你可以回来。考查情态动词的用法。mustnt禁止;neednt没必要;may可以;can能够;might可以,语气比may委婉。以must开头的一般疑问句,作否定回答时用neednt,故排除A、D项;根据“You come back after lunch, if you like.”可知,第二空表示“可以”,要用may。故选C。37B【详解】句意:明天晚上你能来参加我的生日聚会吗? 恐怕不行。我必须照顾我的祖父母。考查情态动词辨析。wouldnt将不会;cant不能;wont将不会;mustnt禁止。根据
47、“I have to look after my grandparents.”可知我必须照顾我的祖父母,所以不能去。故选B。38A【详解】句意:现在多数年轻人喜欢网购,这样他们就不必把时间花费在来回逛商店上。考查情态动词。neednt不需要;cant不可能;mustnt禁止;shouldnt不应该。根据“Now most young people like shopping online”可知,年轻人喜欢网购,因此他们在网上购物,不必花费时间花费在来回逛商店上,故选A。39A【详解】句意:据说咸宁将利用核能发电。然而,核能源可能非常危险。考查情态动词。can可能;need需要;must必须;s
48、hould应该。根据however表示转折关系,however前表示在咸宁将使用核能源来发电,因此however后表示核能源可能非常危险,此处使用情态动词can表示推测。故选A。40A【详解】句意:今天很冷,你应该穿上你的衣服。考查情态动词。should应该;would将;shouldnt不应该;mustnt不准。根据“It is cold”可知表达建议“应该穿上你的衣服”,是肯定句,用“should do”。故选A。41B【详解】句意:抱歉,我昨天没能和你一起去购物,因为我太忙了。考查动词辨析。could=be able to能够,后跟动词原形;couldnt=be not able to不
49、能够,后跟动词原形。根据“Sorry”和“Because I was too busy.”可知,此处说的是因为我太忙了,因此“不能”和你一起去购物,此处是否定。故选B。42B【详解】句意:明天天气怎么样?有可能下雨,可能多云或者晴天。谁知道呢?考查情态动词的辨析。must必须,一定;might可能; should应该;cant不能。由答语中“Who knows?”可知天气是不确定的。故选B。43C【详解】句意:安娜,你总是比你妹妹取得更好的成绩,我想你应当多帮助你妹妹。好的,妈妈。考查情态动词。may可能;cant不可能;should应该;may not可能不,根据前面的“you always
50、 get better grades than your sister. I think you”和后面的“help your sister more”可知,应该是我想你应当多帮助你妹妹,故选C。44D【详解】句意:我必须现在打扫我的卧室吗?不,你不必。你可以在完成作业后打扫。考查情态动词辨析。cant不能;mustnt禁止;needt不必;can能够;may可能;must必须。must引导的一般疑问句,否定回答用needt或dont have to,排除A和B选项。根据“You clean it after finishing your homework”可知,可以在完成作业后打扫,故选D。
51、45B【详解】句意:据说这湖是干的。这是真的吗?那不可能是真的。看,一些孩子在里面游泳。考查情态动词辨析。must be true一定是真实的;cant be true不可能是真的;neednt be true不必是真的;mustnt be true不允许是真的。根据“The lake is said to be dry”及“some kids are swimming in it”可知,“湖是干的”这个说法不可能是真的,故选B。46A【详解】句意:看,有云。你带把伞,有可能下雨。考查情态动词。might可能;need需要;can能,可能,用于否定的推测;should应该。根据“its clo
52、udy”可知表示猜测“可能下雨”,用情态动词“might”。故选A。47C【详解】句意:现在我要走了。下雨了。你最好待在这。如果你不得不离开那就叫个出租车吧。考查情态动词辨析。will将要;may可能;have to不得不;could能,会。由答语“Its rainy. Better stay here.”可知,第二个人不希望第一个人现在走,叫出租车是在不得不离开的情况下发生的。故选C。48C【详解】句意:我找不到我的新手表了!我该怎么办?别担心。你可能把它留在家里了。考查情态动词。can能;need需要;may可能;should应该;根据“I cant find my new watch!”
53、以及“You.leave it at home.”可知,此处是不太肯定的推测,应用may表示,故选C。49B【详解】句意:如果我们不保护自然,一些野生动物将来可能会灭绝。考查情态动词。need需要;may可能,表推测;must一定;could可能,表推测时,可能性较小。如果我们不保护自然,一些野生动物可能会灭绝,并不是一定会灭绝,排除C选项;且灭绝的可能性较大,应用may。故选B。50A【详解】句意:你看起来很累。你最好停下来休息一下。考查情态动词后接动词原形以及非谓语动词。had better do sth“最好做某事”。stop doing sth停下正在做的事情;stop to do s
54、th停下来去做某事。根据“Youd better a rest”可知,是停下来去休息一下,用动词不定式作宾语,故选A。51D【详解】句意:我要打棒球,因为它能增强我的体质。考查动词短语和代词用法。build up增强体质,是一个固定的短语,跟代词作宾语时,代词只能放在中间,可排除BC两项;结合can是情态动词,后面应跟动词原形,故选D。52B【详解】句意:我必须在回家之前完成我的家庭作业吗?不,你不必。但你必须在明天之前完成它。考查情态动词辨析。mustnt不能,表禁止;must必须;neednt无需,指没有必要。对must开头的一般问句进行否定回答,常用neednt而不用mustnt,前空可
55、排除AC两项。but表转折,根据题干“But youfinish it before tomorrow”,可知是说明天之前必须完成作业,故选B。53B【详解】句意:我必须在十二点前回来吗?不,你不必。你可以在那待一天。考查情态动词。neednt不必;must必须;can能,可以,会;mustnt禁止,不准;may可能,也许。根据题干“ Must I .?”是must的一般疑问句,否定回答是“No, sb. neednt.”所以第一空填neednt;根据句意你不必12点回来,可见后句是说你可以待一天,故填can。故选B。54A【详解】句意:人类会生活在其他星球上吗?这可能是真的。未来很难预测。考
56、查情态动词辨析。may可能;need必须;must一定;should应该。根据“Its hard to predict the future”可知,猜测可能是真的,故选A。55B【详解】句意:历史不需要重演。考查need的用法。根据“need”一词可知,既可以是行为动词,也可以是情态动词;当作为行为动词使用时,其否定形式是dont need to do sth.;而作为情态动词使用时,其否定形式是need not/needt do sth.。结合选项,B符合句意。故选B。56C【详解】句意:你最好不要整天呆在家里。走出去,坚持锻炼可以帮助你生活得更健康。考查固定搭配。根据“had better
57、 do sth.”和下句句意可知,最好不要整天呆在家里,因此第一空not stay符合句意;再者根据固定搭配“keep doing sth.”可知,此空需要动名词形式,因此第二空exercising符合句意。故选C。57C【详解】句意:亲爱的,在即将到来的英语考试中你能得多少分?对不起,我不确定。我可能会超过90分。考查情态动词。must肯定;had better最好;may可能;should应该。根据“Im not sure”可知,不确定自己会得多少分,故用情态动词may“可能”,表推测。故选C。58C【详解】句意:他现在不可能在教室里。我刚才看见他在图书馆看杂志。考查情态动词辨析。must
58、必须;need需要;cant不可能;may可能。根据“I saw him reading magazines in the library just now”可知,推测不可能是他,否定推测用cant,故选C。59C【详解】句意:你听说过2020年地球温度将上升到45摄氏度吗? 别担心!这消息可能不是真的。 考查情态动词。must not一定不要,表禁止;neednt不需要;may not可能不;will not将不会。根据“Dont worry!”判断,此消息可能不是真的。故选C。60D【详解】句意:你不必付钱就可以进入音乐会。它是免费的。考查情态动词。cant不能;must必须;might可能;dont have to不必;根据Its free可知,音乐会是免费的,所以没有必要花钱,故选D。答案第13页,共13页