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1、語法專題(四) 情態(tài)動詞 一、情態(tài)動詞的基本含義 1表示能力用can，could，be able to。 注意：can與be able to?？苫Q，但也有不可互換的情況： can可用于人或物作主語的句子中，但be able to只能由有生命的名詞作主語。 can只有一般現(xiàn)在時和一般過去時(could)，但be able to可以用于一般現(xiàn)在時、一般過去時、將來時、完成時。還可用于非謂語動詞短語。 be able to用于過去時表示經(jīng)過一番努力才能做到，一般用肯定句和疑問句，不能用could代替。如： After doing more practice，he was able to speak

2、 English at the meeting.做了更多的練習(xí)之后，他能在會上說英語了。 這樣考過 (2007東城)We_finish it ahead of time，though it was such a tough task. AcouldBwould Cwere able to Dought to 解析：根據(jù)后文中tough可知所填詞表示“(經(jīng)過努力后)能”，應(yīng)該用be able to，因此C項正確。 答案：C (2008湖南)You dont have to know the name of the author to find a book.You _ find the book

3、 by the title. Amust Bneed Ccan Dwould 解析：句意：你沒有必要一定要通過作者的姓名來找到一本書。你可以根據(jù)這本書的標(biāo)題(書名)來找到這本書。must必須，一定；need有必要；can可以，能夠；would會(表示過去將來)。根據(jù)句意，只有C選項符合題意。 答案：C (2007湖南)The biggest problem for most plants，which_just get up and run away when threatened，is that animals like to eat them. Ashant Bcant Cneednt Dm

4、ustnt 解析：shant 不愿意；cant 不能，不可能；neednt 沒有必要；mustnt 不允許，禁止。句意：大部分植物當(dāng)受到威脅的時候不能站起來逃跑，所以對它們來說最大的問題是動物喜歡吃它們。 答案：B 2表示可能性理論可能性can，could，may，might現(xiàn)在可能性肯定句may，might，could疑問句can否定句may not(可能不)，cant(不可能)將來可能性may，might 注意：can，could，may，might可能性依次減少。can表示理論上的可能性，指某事或情況可能發(fā)生，但并不說明實(shí)際上真會發(fā)生；如要表達(dá)某事發(fā)生的實(shí)際可能性，要用may，could

5、或might等： Anybody can make mistakes.任何人都可能犯錯誤。 這樣考過 (寧波兩地聯(lián)考)He _ the test again；in that case，his mother will be very disappointed. Ashould fail Bmust have failed Cmight fail Dcould have failed 解析：由句意知“他可能會考試又不及格；那樣的話，他媽媽會很傷心。”might表推測，表示不太確定，故選C。 答案：C (2008浙江)You _ be hungry alreadyyou had lunch only

6、 two hours ago! Awouldnt Bcant Cmustnt Dneednt 解析：句意：你不可能已經(jīng)餓了你兩個小時前才吃的午飯。cant“不可能”；mustnt意為“絕對不可，被禁止”。 答案：B (北京朝陽區(qū))Will Helen get disappointed if I tell her she failed? I think she _. Amay Bhas to Cshould Dneed 解析：據(jù)句意：如果你告訴海倫她考試沒過，她會失望嗎？我認(rèn)為她可能會。may“可能”，用來表示推測。 答案：A (濰坊質(zhì)檢)My mother is a great cook an

7、d we _ never get enough of her cookies. Amay Bneed Cshould Dcan 解析：由句意“好廚師，她做的甜餅我們永遠(yuǎn)吃不夠?！敝xD“能夠”，表示推測。may也可表示推測，但語氣較弱。 答案：D (北京豐臺區(qū))Its supposed to rain tomorrow. I know，but the forecast _ be wrong.Weather forecasts are far from 100 percent accurate. Amust Bcould Cshould Dwill 解析：此處需表達(dá)的意思為“可能”，只有B項符合

8、題意。 答案：B 3表示許可用詞必要例句請求許可can，could，may，might，shallCould I use your phone?Of course，you can.給予許可can，may，might as well已給予的許可canIts not fair.Joe can stay up till 10 and I have to go to bed at eight. 注意：在會話中，用could和might征求許可，表示語氣委婉。給予許可時也可以使用其他委婉用語，如sure，certainly，go ahead，please等。 這樣考過 (寧波質(zhì)檢)Mr Smith，_

9、he have all these letters typed for you right away? He _.They should be ready by 10 oclock this morning. Awill; must Bshall; has to Cneed; will Dwould; ought to 解析：shall用于一、三人稱的疑問句中表示征求對方意見。 答案：B (江西師大附中)_ I book a table for dinner a few days ahead of time? Yes，you _.The restaurant is always full，es

10、pecially during the holidays. AMust; will BMust; can CShall; shall DShall; must 答案：D (2008成都)If you think the price of pork is too high，you _as well buy some beef.It depends on you! Ashould Bwill Cwould Dmay 解析：may/might as well是固定用法，表示“不妨，倒不如”。 答案：D 4表示建議可用can，may，will，would，youd better(not)等。 這樣考過

11、 (北京東城區(qū))I feel bored with nothing interesting to do. You _ watch TV.There will be a very good Hollywood film on this evening. Aneed Bcould Cwould Dshall 解析：上文提出沒事可干很煩。下文提出建議，你可以看電視啊，could在此處表示提建議，would是指習(xí)慣性的動作，shall表示威脅的語氣，need 需要。 答案：B 可能這樣考 You_phone him if you want to，but you _.Hell surely phone

12、you. Amay; mustnt Bhave to; neednt Cmight; wont Dcan; neednt 解析：根據(jù)題意，第一個空須填“可以”，用may或can皆可，從后句可以判斷“你沒有必要給他打電話”，第二個空只能填neednt。 答案：D 5表示義務(wù)、命令、要求等用must，have to，should，ought to等，意為“必須，應(yīng)該” 這樣考過 (四川)I dont care what people think. Well，you _. Acould Bwould Cshould Dmight 解析：句意：我不在乎人們想什么。不對，你應(yīng)該在乎。根據(jù)語境，后半句中省

13、略了一些與前句相同的內(nèi)容。該題目實(shí)際上考查了情態(tài)動詞的用法。should用以表示義務(wù)或責(zé)任，如：You shouldnt drink and drive.你不應(yīng)該喝酒后開車。 答案：C (湖南)Its the office！So you _ know eating is not allowed here. Oh，sorry. Amust Bwill Cmay Dneed 解析：句意：這是辦公室！所以你必須知道這里不許吃東西。噢，對不起。must“必須”，在此處語氣最強(qiáng)烈。 答案：A (2008海淀)Please carry a cellphone to make it easier for m

14、e to get hold of you. OK，Dad.But I am eighteen.You _ worry so much. Acant Bmustnt Cshouldnt Dwouldnt 解析：說話人認(rèn)為自己不再是小孩子了，對方“不應(yīng)該”再如此擔(dān)心。 答案：C 注意：must的否定形式是need not(不必，沒有必要)，不用must not(禁止)。should還表示吃驚，不耐煩，不相信等。 (海淀)The purpose of education _ be to provide students with a value systemnot to prepare them f

15、or a specific job. Awill Bshould Ccould Dmay 答案：B 6表示意愿和決心用shall，will，would，would rather。 (1)shall表示說話人的強(qiáng)烈意志，有“命令，警告，允諾，威脅”等含義，因此用于第二、第三人稱。 這樣考過 (2008北京)John promised his doctor he _ not smoke，and he has never smoked ever since. Amight Bshould Ccould Dwould 解析：句意：約翰答應(yīng)他的醫(yī)生不再吸煙了，且從那時起就再也不吸了。might not可

16、能不；should not不應(yīng)該；could not不可能(推測)，不能(表能力)；would有“決心、決意”等意思。根據(jù)句意，可知D項正確。 答案：D (合肥一六八中聯(lián)考)Hello，Peter.Would you please go shopping with me after school? Sorry.Our school is a boarding school.In school days nobody _ go out of school without the head teachers permission. Awill Bcan Cmay Dshall 解析：據(jù)句意“我們學(xué)

17、校是寄宿制學(xué)校，沒有班主任的允許任何人不得離校。”知這是學(xué)校的規(guī)定。規(guī)定、規(guī)則或法律條文用情態(tài)動詞shall，表示“命令、警告、允諾、威脅”等意義，故選D。其他選項無此用法。 答案：D (北京東城區(qū))After the bell rings，which indicates the ending of the exam，you _ stay where you are until all your papers are collected. Ashall Bwould CWill Dcan 解析：shall表示說話者的命令、意圖等。意為“一定”。 答案：A (洛陽統(tǒng)考)They want to

18、take possession of my house，but they _ not have it. Ashall Bmust Cwould Dneed 解析：shall表示強(qiáng)烈的意志，也表示說話人的意圖，決心。句意為：他們想占有我的房子，但是他們不會得逞的。 答案：A (2)will可以用于各種人稱，表示意愿。 這樣考過 (江西吉安一中)If you _ let me pay for the bill today，then at least allow me to drive you home. Ashouldnt Bneednt Cwont Dmustnt 答案：C (2006重慶)Mr

19、.Gordon asked me to remind you of the meeting this afternoon.Dont you forget it! OK.I_. Awont Bdont Cwill Ddo 解析：句意：別忘了開會的事呀。好的，我不會的。注意情態(tài)動詞的語氣。 答案：A 特例：will的主語若是無生命的東西，則表示它本身的一種特性或自然屬性；wont則表示失去某種功能，意為“不起作用，就是不”如： Oil will float on water.油會浮到水面上。 Though he tried hard，the door wouldnt open. 盡管他費(fèi)盡了力氣，

20、門就是不開。 (3)would rather意為“寧愿”。 這樣考過 (2008山東壽光現(xiàn)代中學(xué))I didnt go to the museum yesterday. Yes，but I would rather you _ there too. Awent Bhad gone Cshould go Dwould have gone 解析：would rather后跟句子時，要用虛擬語氣，如果是與現(xiàn)在或?qū)硐喾磸木湟眠^去時；如果與過去時相反則用過去完成時。根據(jù)上一句中的時間狀語看應(yīng)該表達(dá)的是與過去相反的虛擬語氣，所以要用過去完成時。 答案：B 還可能這樣考 Would you like t

21、o have a taxi? No，I_walk there.Its such a lovely day. Acan Bought to Chad better Dwould rather 解析：根據(jù)最后一句“Its such a lovely day(天氣這么好)”，判斷前一句應(yīng)是“我寧愿步行去那”，用would rather表示自己的意愿。其他項不能表示此意，故選D。 答案：D 7would或“used to動詞原形”表過去的習(xí)慣。 (1)在表示過去重復(fù)的習(xí)慣時，used to可用would代替。 這樣考過 (2007鄭州)I tried to get through to her，but

22、 she simply_not turn on her cellphone as she was busy. Acould Bmight Cwould Dshould 解析：此處所填詞表“習(xí)慣”。而情態(tài)動詞中只有will，would和used to表“習(xí)慣”，其中will表“經(jīng)常性的習(xí)慣”，would和used to表“過去的習(xí)慣”，而would與used to的區(qū)別是：used to表過去有而現(xiàn)在已經(jīng)沒有了的習(xí)慣，即表過去與現(xiàn)在對比；而would只表過去的習(xí)慣，不涉及現(xiàn)在。根據(jù)句意，此處用would。 答案：C (2)used to強(qiáng)調(diào)過去的行為同現(xiàn)在的對比，含有“過去怎樣，而現(xiàn)在卻不這樣了

23、”的含義；而would則單純表示過去的習(xí)慣性動作，常同often，every day等連用。 She isnt what she used to be.她跟過去不一樣了。(表示對比，不可用would) We would sit in the yard every evening and listened to his story.我們每天晚上坐在院子里，聽他講故事。(表示過去的重復(fù)性行為) 可能這樣考 Mother_us stories when we were young. Aused to tell Bused to telling Cwould tell Dwill tell 解析：本句

24、中有確定的時間段when we were young，因此要用would。 答案：C (3)表示過去的狀態(tài)，只能用used to，不可用would。 There used to be a park here.以前這里有一個公園。 可能這樣考 He_a waiter，but now a taxi driver. Awould be Bused to be Ccould be Dshould be 解析：根據(jù)題意可知他過去是個侍者，而現(xiàn)在不是了，是一個出租車司機(jī)，因此要用used to be。 答案：B 8dare和need的用法 (1)dare的用法：情態(tài)動詞dare主要用于疑問句與否定句中，后

25、接動詞原形(不帶to)，沒有人稱和數(shù)的變化，但過去式為dared；dare也可以用作行為動詞，后跟to do不定式。 可能這樣考 Miss White has decided to explore in the forest by herself. She_ask her boyfriend to if she_go walking in the forest. Aneednt to; dares to Bdoesnt need; dares Cneed not to; dare to Dneednt; dare 解析：本題考查need和dare作情態(tài)動詞的用法。 答案：D There is

26、a lot of smoke coming out of the teaching building there. Really？It _be a fire，most probably. Aought to Bcan Chave to Dmust 解析：表示推測，依據(jù)most probably，語氣應(yīng)為“應(yīng)該”。 答案：A (2)need的用法：need作情態(tài)動詞時。沒有人稱時態(tài)的變化，后接動詞原形，多用于疑問句或否定句中；need也可用作行為動詞，后接名詞、代詞或帶to的不定式。 這樣考過 (2007長沙)Generally，reporters take positive lines.The

27、y do point out a few problems that we_aware of，but theres nothing worrying. Aneed to Bneed Cneed be Dneed to be 解析：need用作情態(tài)動詞時，主要用于否定句，疑問句和條件從句中，后跟動詞原形；need用作行為動詞時，用于肯定、否定和疑問句，后跟名詞、代詞、動詞不定式或動詞ving形式(用ving主動形式表示被動意義)。此處是肯定句，故need用作行為動詞，后跟動詞不定式；be aware of“知道”，因此選D。 答案：D (2010淄博上學(xué)期期末)In fact, you _ go

28、 outside at all. Theres a supermarket just downstairs. Acouldnt Bmustnt Cneednt Dshouldnt 答案：C (2007江西九所)I didnt go to work today. You_；it is Sunday. Adidnt need to Bmustnt have Ccant have Dneednt have 解析：一般情況下，動詞不定式可省略to后的成分，而動詞不定式本身的標(biāo)志詞to不能省略。 答案：A 二、情態(tài)動詞表示推測 1情態(tài)動詞用于對現(xiàn)在和過去的推測。對現(xiàn)在的推測對過去的推測肯定否定肯定否定m

29、ust docant domust havevedcanthavevedcould docouldnt docould havevedcouldnt havevedmay domay not domay havevedmay not havevedmight domight not domighthavevedmightnot haveved 注意：在表示推測時，can不用于肯定句，may不用于疑問句。should可用于表將來的推測。 這樣考過 (成都檢測)I cant find Mr.Li anywhere in the office building.Where _ he have gon

30、e? Amust Bcould Cshould Dwould 解析：could have done“有可能做了某事”，用于推測時，常用在否定句中和疑問句中；must have done“肯定是做了某事”，用于肯定推測，用在肯定句中；should have done“該做某事而事實(shí)上未做”；would have done“將有可能做”。據(jù)句意知：他有可能去了哪里呢？綜上，選B。 答案：B (重慶)Hi，Tom.Any idea where Jane is? She _ in the classroom.I saw her there just now. Ashall be Bshould hav

31、e been Cmust be Dmight have been 解析：句意：嗨，Tom，知道Jane在哪兒嗎？她肯定在教室里。我剛才在那兒看到她了。從對話中可以看出該空是對現(xiàn)在情況的較肯定的猜測。 答案：C (2008重慶)I cant find my purse anywhere. You _ have lost it while shopping. Amay Bcan Cshould Dwould 解析：句意：我到處都找不到我的錢包。你可能在購物的時候弄丟了。根據(jù)句意首先排除C、D兩項；can表“實(shí)際”的可能性時，只能用于否定句、疑問句，故被排除；A項表“推測”時常用于肯定句。 答案：A

32、 (北京西城區(qū))There _ be any difficulty in passing the oral test since you have practiced a lot in school. Amustnt Bshant Cshouldnt Dneednt 解析：由句中“since you have practiced a lot in school”即“既然你在學(xué)校進(jìn)行了大量的訓(xùn)練”推知“應(yīng)該”是不會有什么困難。should表推測“按常理推測”。故選C。 答案：C (上海)It _ have been Tom that parked the car here，as he is th

33、e only one with a car. Amay Bcan CMust Dshould 解析：句意：一定是湯姆把車停在這里的，因?yàn)橹挥兴熊?。此句為?qiáng)調(diào)句型，謂語動詞為must have been，用must表示語氣肯定的推測。must have done表示“(過去)一定做了某事”。 答案：C (南通調(diào)研)John，how did your English exam go? I thought I _，but in fact I came in the top 10%in the class. Ashould have failed Bcouldnt have failed Cmigh

34、t have failed Dmustnt have failed 解析：由句中“I thought I _，but in fact I came.”知我通過了考試，而在此之前擔(dān)心“有可能考試不及格”，故選C。 答案：C (福州模擬)Where is Michael？I cannot find him anywhere. He _ have been off long.I saw him study in the room just now. Ashouldnt Bcant Cmustnt Dneednt 解析：cant(不可能)；shouldnt(不應(yīng)該)；mustnt(不可以)；needn

35、t(不必)。由句中“我剛才還看見他在屋里學(xué)習(xí)呢。”可推知“他還沒走多長時間。”can表推測，主要用于否定句和疑問句中。綜上，選B。 答案：B 2情態(tài)動詞have done的其他含義 (1)“should/ought to havev.ed“意為“本應(yīng)該”，表示過去應(yīng)該做而沒有做的事，也可表示驚訝、贊嘆等情緒。 這樣考過 (2007陜西)I told your friend how to get to the hotel，but perhaps I_have driven her there. Acould Bmust Cmight Dshould 解析：后半句的意思是：但也許我本應(yīng)該開車送她去

36、那兒。用should，構(gòu)成shouldhave done結(jié)構(gòu)，意思是：本應(yīng)該做。 答案：D (2)“shouldnt/ought not tohavev.ed”意為“本不應(yīng)該”，表示過去不應(yīng)該做某事但卻做了。 這樣考過 (天津河西區(qū))He _ back to work without the doctors permission.Now，he has to stay in bed for a couple of days. Awouldnt have gone Bcouldnt have gone Cneednt have gone Dshouldnt have gone 解析：由句中后半句“

37、he has to stay in bed for a couple of days.”知“他未遵醫(yī)囑”，含有“不該做某事而做了”之意，故選D。wouldnt have gone“本不會做而做了”；couldnt have gone“本不可能做而做了”；neednt have done“本不需做而做了”。 答案：D (廈門質(zhì)檢)You _ late for yesterdays class meeting，as it was so important. Acouldnt be Bshouldnt be Cmustnt have been Doughtnt to have been 解析：oug

38、htnt to have done同于shouldnt have done表示“不該做某事而做了”。由句意知D合題意。 答案：D (3)“couldhavev.ed”意為“本能夠，本可以”，表示過去本可以做某事，但卻沒做。 這樣考過 (江蘇)He did not regret saying what he did but felt that he _ it differently. Acould express Bwould express Ccould have expressed Dmust have expressed 解析：句意：他不后悔說了他做了什么，而認(rèn)為他本能夠用不同的方式表達(dá)。

39、could express 能夠表達(dá)；would express 要表達(dá)；could have expressed 本來能夠表達(dá)；must have expressed(表推測)肯定已經(jīng)表達(dá)。 答案：C (4)“neednthavev.ed”意為“本沒有必要”，表示過去本沒有必要做某事，但卻做了。 注意：“need nothavev.ed”表示過去本不必做但卻做了的事；“did not need to動詞原形”表示過去不必做某事而實(shí)際上也沒有做。如： She need not have come yesterday.她昨天本不必要來的。(但卻來了) She didnt need to come

40、 yesterday.她昨天不必來。(實(shí)際上也沒來) 三、固定用法 cant too.無論怎樣也不過分，越越好；cant help doing情不自禁做某事；may/might as well還是做的好；would rather.than寧愿做也不愿做。 這樣考過 (龍巖質(zhì)檢)Traffic safety is so important that everyone _ take safety measures too seriously. Ashouldnt Bmustnt Ccannot Dwont 解析：cant.too.表示“怎么都不過分，千萬，非常?！?答案：C (北京朝陽區(qū))She

41、couldnt help，even though she tried not to，_ at the strange clothes her friend was wearing. Ato laugh Blaugh Claughing Dlaughed 解析：couldnt help doing 禁不住做某事；even though she tried not to是狀語從句，插到主句中了。 答案：C .單項填空 1Isnt that Anns husband over there? No，it_be him.Im sure he doesnt wear glasses. AcantBmust

42、 not Cwont Dmay not 答案與解析：Acan用于否定的猜測表示“不可能”。故選A。 2Kunming is called“Spring City”，but it_snow in winter. Ashall Bcan Cmust Dmight 答案與解析：B情態(tài)動詞can表示客觀的可能性，“有時可能”。 3You _fail to pass the entrance examination if you dont study harder. Ashall Bcould Cmust Dshould 答案與解析：Ashall用于二、三人稱的陳述句中，表示說話者的意愿，有命令、警告、

43、威脅、允諾、決心之意。此題用shall，表示警告。 4He didnt agree with me at first，but I_persuade him to sign the agreement later. Acould Bmight Cshould Dwas able to 答案與解析：D情態(tài)動詞can和be able to都可表示能力。當(dāng)表示“過去成功地做了某事”時，用was/were able to。 5When I was studying at Beijing University，I_take a walk along the lake every evening. Awil

44、l Bwould Ccould Dshall 答案與解析：B情態(tài)動詞would表示過去經(jīng)常性或習(xí)慣性的動作。 6 Will you stay for lunch? Sorry，_.My brother is coming to see me. AI mustnt BI cant CI neednt DI wont 答案與解析：B根據(jù)題義可知，因?yàn)椤拔业艿芤獊砜次摇?，所以“不能留下”，用cant，表示對別人的邀請或要求給予禮貌的拒絕。A項表示“禁止”；C項表示“不必要”；而D項表示“不會”，均不符合題義，故本題選B。 7All the speech competitors _ remain in

45、 their own seats until the contest is over，according to the competition rule. Amust Bmay Cshall Dneed 答案與解析：Cshall用于表示規(guī)定要求。 8 Mum，I climbed to get the Teddy Bear from the top of the shelf. My goodness！You_yourself.You mustnt do that next time. Amust have hurt Bshould have hurt Cmay have hurt Dcan ha

46、ve hurt 答案與解析：C你可能會傷了你自己。may/might have done表示對過去發(fā)生情況的可能性推測。 9I cant get through to the general managers office anyhow. The line is busy.Someone_the telephone. Amust use Buses Cmust have been using Dmust be using 答案與解析：Dmust be doing表示對現(xiàn)在正發(fā)生情況的肯定推測。must have been using是對過去的猜測，表示過去一直在做某事，不符合句義。 10Tom

47、，did you see the film Avatar last night? Yes，but I really_，because I had lots of work to do. Acouldnt have Bmustnt have Cneednt have Doughtnt to have 答案與解析：D題意為：“湯姆，昨天晚上你看電影阿凡達(dá)了嗎？”“是的，但是我確實(shí)不應(yīng)該看，因?yàn)槲矣性S多工作要做?！眔ught to have done意為“應(yīng)該做卻沒做”，oughtnt to have done意為“不該做卻做了”。 11Her brother _ be at home now，be

48、cause he was seen playing basketball in the stadium just now. Amustnt Bneednt Ccant Dshouldnt 答案與解析：C由playing basketball可知表語氣較為肯定的否定推測，故選C。cant be at home意為“不可能在家”。 12The little child_go out alone at night，so he _walk in the dark that night. Adarent; didnt dare to Bdoesnt dare; dare not Cisnt dare t

49、o; dared not to Ddoesnt dare to; dare not to 答案與解析：A題意為：這個小男孩晚上不敢單獨(dú)出去，所以那天晚上他不敢走夜路。dare作為情態(tài)動詞，后面直接跟動詞原形，否定形式在dare后面直接加not；dare作為一般動詞使用時，用dare to do結(jié)構(gòu)，否定形式在dare前面加助動詞和not。故選A。 13I dont know what I_without the suitcase you lent me. Glad to have been of some help to you. Awould have done Bwould do Csho

50、uld have done Dshould do 答案與解析：A題意為：“我不知道沒有你借給我的手提箱我將怎么辦?！薄昂芨吲d對你有幫助?！眞ould have done表示對過去事情的推測，意為“過去可能做”；should have done表示對某事的責(zé)備和批評，意為“本該做卻沒做”。 14Well，lost again! Its not very important.We_forget about it，OK? Acant Bmay so soon Cmight as well Dwont soon 答案與解析：C題意為，“哦，又輸了！”“那不重要。我們不妨把這件事忘了，好嗎？“might

51、 as well意為“無妨；只好”是固定用法。 15It rained a lot during their journey，so they_have had a good time. Acant Bmust Cshouldnt Dmight 答案與解析：AA項表示對過去事情否定的推測，cant have done意為“不可能做”，shouldnt have done表示對某事的責(zé)備和批評，意為“本不該做卻做了”。B、D都表示肯定的推測，由.rained a lot知意義不對。 16The public transportation is very convenient in that big

52、 city，so there_be any difficulty in traveling around. Amustnt Bwouldnt Cshouldnt Dneednt 答案與解析：C題意為：那個大城市公共交通非常方便，在周圍旅行不應(yīng)該有任何困難。根據(jù)題意選shouldnt“不應(yīng)該”。 17That woman has been taking care of the two white tigers for 8 years. Oh，dear！She_a lot of difficulties! Acould go through Bmight go through Cought to

53、have gone through Dmust have gone through 答案與解析：D題意為：“那個女人已經(jīng)照顧那兩只白虎8年了?！薄芭?，天??！她一定吃了很多苦。”must have done表示對過去事情的肯定推測，意為“一定做過”。 18You_me up so early.I dont have to go to school today and I can sleep for more hours. Aneednt wake Bdont need to wake Cneednt have woken Ddidnt need to wake 答案與解析：C題意為：你沒必要那么

54、早叫我起床，今天我不上學(xué)，可以多睡幾個小時。neednt have done表示對某事的責(zé)備和批評，意為“沒必要做而做了”。 19All my family are looking forward to meeting you.You _come over and have dinner with us this weekend. AWill Bmust Cmay Dshall 答案與解析：B題意為：我家所有人都盼望和你見面，這個周末你一定要過來和我們共進(jìn)晚餐。根據(jù)題意可知選must“必須”。 20This_Johns car.Its number is AC506. I dont think

55、 so.He said a small white car but this is a small yellow one. Acant be Bmust be Cmay not be Dshould be 答案與解析：B題意為：“那一定是約翰的汽車，車牌是AC506?！薄拔艺J(rèn)為不是。他說他的是一輛白色的小轎車，但這是一輛黃色的?！备鶕?jù)題意可知是表示對現(xiàn)在肯定的推測，故選B。 21Being examined twice a year，whether it is a car or a bus or a truck，is the rule that every driver_obey in thi

56、s city. Ashall Bcan Cought to Dneed 答案與解析：A題意為：無論是小汽車、公共汽車還是卡車，在這個城市里年檢兩次是每位司機(jī)應(yīng)該遵守的規(guī)定。當(dāng)表示按要求“必須，應(yīng)該”做的事并且主語是二、三人稱時只能用shall。 22Last night I tried to call on you but your dog simply_not let me come through the gate. Amight Bcould Cshould Dwould 答案與解析：D題意為：昨天晚上我試圖拜訪你但是你的狗就是不讓我進(jìn)門。might表示“也許”；could表示“可能”；

57、should表示“應(yīng)該”；would表示“意愿”。根據(jù)題意選D。 23Why dont you buy the necklace since you like it so much? I_，but I dont have the money. Awould Bwill Cshould Dmay 答案與解析：A題意為：“既然你非常喜歡那串項鏈，為什么不買呢？”“我是想買，但是我沒有錢?！备鶕?jù)題意空處表示“想買”的意愿，所以排除C、D；因?yàn)椤跋胭I”是過去的意愿，所以選would。 24Look！The clouds are gathering. Yes.Im afraid it_be pourin

58、g down soon. Acan Bmust Cshould Dmight 答案與解析：D題意為：“看！云團(tuán)在聚集?！薄笆堑模赡荞R上就會大雨傾盆了?！庇删渥犹崾究闯龃颂幈硗茰y，由Im afraid看出把握不是非常大，故用might。can用于疑問句表示推測。 25_he come to see you as he promised? Of course，please.And Id rather he_me the truth. AWill; tells BShall; told CShould; will tell DCan; is telling 答案與解析：B題意為：“你要他像他答應(yīng)的那樣過來看你嗎？”“當(dāng)然，而且我寧愿他告訴我真相?！北硎菊髑髮Ψ揭庖娀蛘埱螅谌朔Q作主語用shall；Id rather后面的從句要用虛擬語氣，故選B。