天津市高考英語二輪復習 第一部分 單項填空 專題七 情態(tài)動詞和虛擬語氣課件

《天津市高考英語二輪復習 第一部分 單項填空 專題七 情態(tài)動詞和虛擬語氣課件》由會員分享，可在線閱讀，更多相關《天津市高考英語二輪復習 第一部分 單項填空 專題七 情態(tài)動詞和虛擬語氣課件（46頁珍藏版）》請在裝配圖網(wǎng)上搜索。

1、專題七情態(tài)動詞和虛擬語氣專題七情態(tài)動詞和虛擬語氣-2-考情概覽1.考查情態(tài)動詞的基本意義和用法,特別是can,may,must,need,shall,should,will,would等。要求把握情態(tài)動詞的語法特征和語意特征,區(qū)別意義相近、用法類似的情態(tài)動詞。2.考查情態(tài)動詞表示推測、允諾、請求、判斷的用法,尤其是can,could,may,might,must表示推測的用法。要求準確把握說話者的語氣,深刻體會說話者的情感態(tài)度,結合情景做出合理的選擇。3.考查“情態(tài)動詞+have done”結構的用法。要求掌握該結構中不同的情態(tài)動詞所表達的特殊意義。4.考查虛擬語氣在條件句中的用法。要求掌握與

2、現(xiàn)在、過去、將來三個不同時間的事實相反的虛擬語氣,以及省略if的虛擬倒裝句。-3-5.考查虛擬語氣在隱含的虛擬條件和錯綜時間條件句中的用法。要求識別由一些介詞或連詞提供的虛擬條件,明確主句和條件狀語從句謂語所發(fā)生的不同時間。6.考查虛擬語氣在名詞性從句中的用法,注意在這些固定句型中謂語所使用的形式。-4-考點一考點二考點三考點四考點五考點六考點七考點八考點九can/could與be able to1.can/could用來表示“一般能力”;be able to有多種時態(tài),且用來表示在特定條件下的“具體能力”。如:My grandma is over seventy,but she can st

3、ill read without glasses.He was able to flee Europe before the war broke out.2.表示允許可用can或could,與may/might意義接近。could可用于一般現(xiàn)在時,只是語氣更加委婉、客氣,回答時則一般要用can而不用could。Could I have the television on?Yes,you can./No,you cant.-5-考點一考點二考點三考點四考點五考點六考點七考點八考點九【典例分析】 (2017北京卷,21)Samuel,the tallest boy in our class, ea

4、sily reach the books on the top shelf.A.must B.shouldC.canD.need答案為C項。句意:塞繆爾是我們班最高的男生,他很輕松就能夠到書架頂層上的書。表示能力,用can“能夠”。must“必須”;should“應該”;need“必須”。-6-考點一考點二考點三考點四考點五考點六考點七考點八考點九(2016天津卷,5)It was really annoying;I get access to the data bank you had recommended.A.wouldntB.couldntC.shouldntD.neednt答案為B項

5、。句意:這真讓人惱火。我不能進入你推薦的資料庫。wouldnt“不愿意”;couldnt“不能”;shouldnt“不應該”;neednt “沒必要”。由第一句“這真讓人惱火”可知,couldnt為最佳答案,即“我不能進入你推薦的資料庫”是“這真讓人惱火”的原因。-7-考點一考點二考點三考點五考點六考點七考點八考點四考點九may與might1.表示允許,意為“可以,許可”,用法基本上同can與could。如:May I use your bicycle?2.表示可能性,意為“也許,可能”。如:According to the weather forecast,it may rain tomor

6、row.-8-考點一考點二考點三考點五考點六考點七考點八考點四考點九【典例分析】 You feel all the training a waste of time,but Im a hundred percent sure later youll be grateful you did it.A.shouldB.needC.shallD.may答案為D項。should“應該”,表示責任、義務或按照事理常規(guī)做推斷,還可以表示“萬一,竟然”;need“需要”;shall“會,應該”,表示允諾、命令、警告、決心以及法律規(guī)章的規(guī)定;may“也許,可能”。從句子后半部分的“but Im a hundr

7、ed percent sure .”可以看出,句子前半部分是說話人對“you”的心理推測,存在不確定性,故用may,所以D項正確。句意:你可能覺得所有這些訓練是在浪費時間,但我百分之百地確信,你以后會慶幸你做了(這些訓練)。-9-考點一考點二考點三考點五考點六考點七考點八考點四考點九must與have to1.must用來表示說話人的主觀看法;have to表示客觀的需要,強調外界壓力,不得已而為之。如:He said that they must work hard.(主觀上要做這件事) My brother was ill,so I had to call the doctor in th

8、e middle of the night.(客觀上需要做這件事)2.表示“不必”,須用dont have to或neednt。mustnt表示“禁止,絕對不可”。如:You dont have to tell him about it.You mustnt tell him about it.Must we do it now?No,you neednt.-10-考點一考點二考點三考點五考點六考點七考點八考點四考點九【典例分析】 (2017天津卷,2)My room is a mess,but I _ clean it before I go out tonight.I can do it

9、in the morning.A.darentB.shouldntC.needntD.mustnt答案為C項。句意:我的房間亂得一團糟,但是今晚出門前我不必打掃。我可以早上打掃。根據(jù)后一句“我可以早上打掃”可知,此處應用neednt表示“不必做某事”。故選C項。(2016北京卷,31)I love the weekend,because I get up early on Saturdays and Sundays.A.needntB.mustntC.wouldntD.shouldnt答案為A項。句意:我之所以喜歡周末是因為我在周六、周日不必早起。neednt “不必”;mustnt “禁止”

10、;wouldnt “不會”; shouldnt “不應該”。由句意可知,A項正確。-11-考點一考點二考點三考點五考點六考點七考點八考點四考點九shall,should與ought to1.shall常用以表示下面三個方面的意思:(1)用于第一、第三人稱的疑問句中,用來征求對方的意見或請求指示。如:What shall he do next?(2)用于第二、第三人稱的陳述句中,表示說話人的意愿,有“命令、警告、允諾、威脅、強制”等意思。如:He shall stay in bed.You shall have it back next week.He says he wont go,but I

11、 say he shall.(3)用于表示法律法規(guī)及規(guī)章制度所做出的規(guī)定。如:In our mall all payments shall be made in cash.-12-考點一考點二考點三考點五考點六考點七考點八考點四考點九2.should表示“建議”或“勸告”,有“應該”之意。如:You should learn from each other.3.ought to表示根據(jù)某種義務或必要“應當”做某事。如:Everyone ought to obey the traffic regulations.4.should和ought to也可用來表示推測,意為“想必會”。如:When c

12、an I come for the photos?I need them tomorrow afternoon.They should be ready by 12:00.-13-考點一考點二考點三考點五考點六考點七考點八考點四考點九【典例分析】 One of our rules is that every student wear school uniform while at school.A.mightB.couldC.shallD.will答案為C項?？疾榍閼B(tài)動詞。句意:我們有一項規(guī)定,每位學生在校期間都要穿校服。此處shall表示按照法律、條文、規(guī)定必須要做的事情。其他選擇項均無此用

13、法。-14-考點一考點二考點三考點五考點六考點七考點八考點四考點九will與would1.will 用于各種人稱,表示意志、意愿或決心等。如:If you will keep your watch half an hour slow,it is hardly surprising that you are late for your appointments.2.will表示習慣性的動作,意為“總是,慣于”。如:An Englishman will usually show you the way in the street.3.would可表示過去反復發(fā)生的動作。如:On Sundays h

14、e would get up early and go fishing.-15-考點一考點二考點三考點五考點六考點七考點八考點四考點九【典例分析】 I still remember my happy childhood when my mother take me to Disneyland at weekends.A.mightB.mustC.wouldD.should答案為C項?？疾榍閼B(tài)動詞。句意:我仍然記得我的快樂童年,那時媽媽經常在周末帶我去迪士尼樂園。might“可能,也許”;must“必須”;would“過去常?！?should“應該”。The door open,no matte

15、r how hard she pushed.A.shouldnt B.couldntC.wouldnt D.mightnt答案為C項?？疾榍閼B(tài)動詞。句意:無論她怎么用力推,這扇門就是打不開。表示特定情況下事物的傾向性用will/would。wouldnt open “打不開”。shouldnt “不應該”;couldnt “不能夠”;mightnt “可能不,或許不”。-16-考點一考點二考點三考點五考點六考點七考點八考點四考點九情態(tài)動詞表示推測1.肯定句中用must(一定,很可能),may(可能),might/could(也許,或許)表示推測。表示對當前行為、情況或狀態(tài)的推測,用must/m

16、ay/might/could+do/be句型;表示對此時此刻正在進行的動作的推測,用must/may/might/could+be doing句型;表示對過去發(fā)生的事情的推測,用must/may/might/could+have done/been句型。如:I always meet him in the street.He must/may/might/could live quite near here.There is still light in his room.He must/may/might/could be studying at this time.I didnt hear

17、 the phone.I must have been asleep.-17-考點一考點二考點三考點五考點六考點七考點八考點四考點九2.否定句中用can/could或may/might表示推測。如:Though he is busy,he cant/may not refuse your invitation because you are good friends.The room cant have been cleaned by Li Ping,because she left here half a year ago.3.疑問句中常用can/could表示推測。如:Can he be

18、English?No.He cant be English.He must be American.The dictionary has disappeared.Who could have taken it?-18-考點一考點二考點三考點五考點六考點七考點八考點四考點九【典例分析】 You be Carol.You havent changed a bit after all these years.A.mustB.canC.willD.shall答案為A項。句意:你一定是卡羅爾。這些年你一點兒沒變。must表示肯定推測;can表示推測時,常用于一般疑問句和否定句中;will表示意愿或傾向性

19、;shall與第二、三人稱連用,表示“允諾、警告、命令、威脅”。-19-考點一考點二考點三考點五考點六考點七考點八考點四考點九“情態(tài)動詞+have done”結構1.must have done sth.用來表示對過去事情的肯定推測。如:Since the road is wet,it must have rained last night.2.should/ought to have done sth.表示“(過去)本應該做某事(而實際上未做)”,一般含有責備的意味。如:You should have come here a little earlier.3.could have done

20、sth.表示“(過去)本能夠、本可以做某事(而實際上未做)”,有時也含有責備意味。如:Given more time,he could have done it better.4.need not have done sth.表示“(過去)本不必、無須做某事(而實際上已做)”。如:You neednt have come last night.-20-考點一考點二考點三考點五考點六考點七考點八考點四考點九【典例分析】 (2017天津卷,15)Do you have Bettys phone number?Yes.Otherwise,I able to reach her yesterday.A

21、.hadnt been B.wouldnt have beenC.werentD.wouldnt be答案為B項。句意:你有貝蒂的電話號碼嗎?是的。如果沒有的話,昨天我就找不到她了。這是與過去事實相反的虛擬語氣形式,otherwise相當于一個條件狀語從句,空格所在的句子相當于主句,故用“情態(tài)動詞+have done”的形式,選B項。-21-考點一考點二考點三考點五考點六考點七考點八考點四考點九(2015天津卷,7)I have worried before I came to the new school,for my classmates here are very friendly to

22、 me.A.mightntB.mustntC.needntD.couldnt答案為C項。句意:來這所新學校之前我原本不必擔憂,因為這里的同學們對我都非常友好。neednt have done表示過去原本不必要做某事但是已經做了;mightnt have done表示過去也許沒有做某事;沒有mustnt have done這種用法;couldnt have done表示過去不可能做某事。-22-考點一考點二考點三考點五考點六考點七考點八考點四考點九虛擬語氣在虛擬條件句中的用法 -23-考點一考點二考點三考點五考點六考點七考點八考點四考點九1.在具體運用中,條件從句中有時可省略if而采用倒裝結構。

23、如:Had it not been for your help,we wouldnt have achieved so much.2.介詞(短語)without/but for,連詞but,副詞otherwise常用來表示某種假設條件。如:I wouldnt have made such rapid progress without your help.3.有時候從句動作和主句動作發(fā)生的時間不一致,這時謂語動詞的形式要根據(jù)各自的時間來調整。如:If the weather had been more favourable,the crops would be growing still bet

24、ter.-24-考點一考點二考點三考點五考點六考點七考點八考點四考點九【典例分析】 (2017江蘇卷,22) not for the support of the teachers,the student could not overcome her difficulty.A.It wereB.Were itC.It wasD.Was it答案為B項。句意:要是沒有老師們的支持,這名學生是不可能克服困難的。在if引導的虛擬條件狀語從句中,若謂語動詞含有were,可以省略if,將條件從句的主語置于were之后,構成倒裝句。故選B項。-25-考點一考點二考點三考點五考點六考點七考點八考點四考點九(

25、2016天津卷,15)I was wearing a seatbelt.If I hadnt been wearing one,I .A.were injuredB.would be injuredC.had been injuredD.would have been injured答案為D項。句意:我系著安全帶。如果我沒系著安全帶,我可能就受傷了。由第一句可知本題是談論過去的事情。對過去的事情進行虛擬時,if條件句用過去完成時(had+過去分詞),主句用“would have +過去分詞”。故選D項。-26-考點一考點二考點三考點五考點六考點七考點八考點四考點九Without his war

26、time experiences,Hemingway his famous novel A Farewell to Arms.A.didnt writeB.hadnt writtenC.wouldnt writeD.wouldnt have written答案為D項。句意:如果沒有戰(zhàn)時的經歷,海明威就不會寫出他的著名小說永別了,武器。without,but for為含蓄虛擬語氣的提示詞。由句意可知,海明威寫小說發(fā)生在過去,此處表示與過去事實相反的假設,故謂語動詞用would have done的形式。-27-考點一考點二考點三考點五考點六考點七考點四考點八考點九虛擬語氣的其他用法1.在wish

27、后面的賓語從句中以及would rather和if only后面的句子中用虛擬語氣。如:I failed in the exam.I really wish I had known the answers.I would rather you met her at the airport tomorrow morning.If only I had not come here alone.在It is wished that引導的主語從句以及名詞wish后面的表語從句、同位語從句中也要用虛擬語氣,從句謂語的形式同wish后面賓語從句的形式。如:It is wished that man cou

28、ld fly freely in the sky.注意:wish的時態(tài)和后面從句的時態(tài)無關。-28-考點一考點二考點三考點五考點六考點七考點四考點八考點九2.在insist(堅決要求)/suggest(建議)/recommend/propose/order/demand/require/request等后的賓語從句中要用虛擬語氣,從句謂語用(should) do的形式。如:He suggested that we (should) start at once.在It is suggested/proposed that引導的主語從句以及名詞insistence/suggestion/propo

29、sal/order/demand等后面的表語從句、同位語從句中也要用虛擬語氣,謂語的形式同這些名詞相應的動詞后面的賓語從句的形式一致。如:Their proposal is that their output (should) be increased by 20%.3.在It is necessary/important/possible/strange/no wonder/a pity/a shame等后面的主語從句中要用虛擬語氣,謂語用(should) do 的形式。如:It is necessary that he (should) be sent there at once.-29-

30、考點一考點二考點三考點五考點六考點七考點四考點八考點九4.在It is (high) time that后面的從句中要用虛擬語氣,謂語用過去式或should do的形式,should不可省略。如:It is time that we went/should go to bed.5.在as if/as though后面的從句中也常用虛擬語氣。如:She always talks to me as if she were my sister.-30-考點一考點二考點三考點五考點六考點七考點四考點八考點九【典例分析】 (2015天津卷,13)I wish I at my sisters weddin

31、g last Tuesday,but I was on a business trip in New York then.A.will beB.would beC.have been D.had been答案為D項。句意:我多么希望自己上個星期二能參加姐姐的婚禮呀,可是我當時正在紐約出差。wish后面接賓語從句時,賓語從句的謂語動詞使用虛擬語氣,根據(jù)last Tuesday可知,此處表示對過去的情況的虛擬,所以用過去完成時。-31-考點一考點二考點三考點五考點六考點七考點四考點八考點九It was John who broke the window.Why are you talking to

32、 me as if I it?A.had doneB.have doneC.did D.am doing答案為A項。考查虛擬語氣。句意:打破窗戶的是約翰,為什么你跟我說話的樣子就好像是我做了這件事?as if后面的從句通常用虛擬語氣,從句表示對過去的虛擬,所以用過去完成時。-32-考點一考點二考點三考點五考點六考點七考點四考點八考點九6.虛擬語氣的題目有時并不出現(xiàn)if條件句,而是通過without/but for/or/otherwise等暗示虛擬條件的語境?！镜淅治觥?It is lucky we booked a room,or we nowhere to stay now.A.hadB

33、.had hadC.would haveD.would have had答案為C項。句意:幸虧我們訂了房間,否則現(xiàn)在將沒有地方住。分析語境以及時間狀語now可知,此處表示與現(xiàn)在事實相反的假設。因此主句謂語動詞用“would+do”的形式,故選C項。-33-1.(2017北京卷,34)If the new safety system to use,the accident would never have happened.A.had been putB.were putC.should be putD.would be put解析 句意:如果新的安全系統(tǒng)被投入使用,那么這個事故就不會發(fā)生了。根

34、據(jù)句意可知,此處表示對過去的事情進行假設,所以條件句應使用過去完成時態(tài)。A-34-2.(2017天津高考壓軸卷,23)Lisa,what do you think of the job of being a nurse?In my opinion,it be difficult sometimes though it seems easy.A.should B.canC.mustD.need解析 句意:麗莎,你認為當一名護士這個工作怎么樣?在我看來,這個工作盡管看似容易,但有時可能是很難的。此處考查情態(tài)動詞,應選B項can“可能”,表示推測。B -35-3.(2017天津高考壓軸卷,30)We

35、 would rather our daughter at home with us,but it is her choice,and she is not a child any longer.A.would stayB.has stayedC.stayedD.stay解析 句意:我們寧愿女兒和我們一起待在家里,但這是她的選擇,她已不再是孩子了。此處考查虛擬語氣,指女兒沒像我們希望的那樣待在家里,與現(xiàn)在事實相反,故選C項。C-36-4.(2016北京卷,34)Why didnt you tell me about your trouble last week?If you me,I coul

36、d have helped.A.toldB.had toldC.were to tellD.would tell5.(2016江蘇卷,27)If it for his invitation the other day,I should not be here now.A.had not been B.should not beC.were not to beD.should not have beenB 解析句意:為什么上星期你不把你的困難告訴我呢?如果你告訴我,說不定我會幫得上你呢。由問句中的last week及 could have helped推知,從句是對過去事實的虛擬,故用過去完成時

37、。A解析從句是與過去事實相反的虛擬語氣,所以選had+過去分詞。句意:如果沒有他那天的邀請,我現(xiàn)在不會在這里。-37-6.(2016浙江卷,15)Had the governments and scientists not worked together,AIDS-related deaths since their highest in 2005.A.had not fallenB.would not fallC.did not fallD.would not have fallen7.Im sorry Im busy now.If I time,I would certainly go t

38、o the movies with you.A.haveB.hadC.have hadD.had hadD 解析逗號前的內容是If條件句的倒裝形式,其正常形式為:If the governments and scientists hadnt worked together?？梢钥闯鲞@是與過去事實相反的虛擬,故主句應該用would(not)have done的形式。故選D項。D 解析句意:不好意思,我現(xiàn)在很忙,如果我有時間的話,我一定會與你一起去看電影的。主句的謂語是would go,表示與現(xiàn)在事實相反的虛擬語氣。非真實條件句用一般過去時had表示與現(xiàn)在事實相反的主觀假設。-38-8.I am

39、sure I saw Brian in the park this morning.You be imagining things.He left for America last night.A.needB.canC.mustD.shallC 解析句意:我確信今天早晨在公園里看到布萊恩了。你一定是在想象吧。他昨天晚上去美國了。此處是對現(xiàn)在情景的推斷,故用must表示“一定”。can表示推測時,用于疑問句和否定句中。9.He ,but he chose to stay and fight.A.escapedB.did escape C.might escapeD.could have esca

40、pedD 解析句意:他本可以逃跑但是他選擇留下來戰(zhàn)斗。could have done “本來可以做某事實際沒做”。表示與過去事實相反的虛擬語氣。 -39-10.There will be a new film tonight.Yes.But for tomorrows test,I to see it with you.A.will goB.will have goneC.would goD.would have gone11.Will you read me a story,Mummy? OK.You have one if you go to bed as soon as possible

41、.A.shallB.mustC.couldD.mightC 解析第二句話的意思是“要不是明天的考試的話,我就會跟你一起去了”。主句表示將來不可能實現(xiàn)的主觀愿望,故用would+動詞原形。A解析句意:媽媽,你給我讀一個故事,好嗎?好吧。如果你盡快上床睡覺的話,你會有故事聽的。在肯定句中,第二人稱后面跟shall可表示“許諾”。-40-12.I told your friend how to get to the hotel,but perhaps I have driven her there.A.couldB.mustC.mightD.should 13.I dont agree with M

42、r.Johnsons views about social welfare.He some better words to express his ideas,but I think what he said makes a lot of sense.A.might use B.should have used C.could useD.would have usedD 解析句意:我告訴過你的朋友怎么到旅館的,但是可能我應該開車把她送到那兒去的。此處表示過去“應該做某事而實際上沒有做”,故用should have done形式,故選D項。B解析句意:我不同意約翰遜先生關于社會福利的那些觀點。他

43、本應該用一些更好的詞來表達他的想法的,但我認為他說得很有意義。should have done“本應該做而沒有做”,是對過去發(fā)生的情況的虛擬表達。-41-14.To our surprise,he strongly demanded that she immediately for what she just said at the meeting.A.apologizeB.would apologizeC.apologizedD.had apologized15.My deskmate is no doubt the brightest student in our class and al

44、ways work out those difficult maths problems.A.canB.mightC.mustD.shouldA 解析句意:讓我們吃驚的是,他強烈地要求她立刻為她剛剛在會議上說的話道歉。demand“強烈要求”,后接賓語從句時,從句要用虛擬語氣,其謂語形式是“should+動詞原形”,should可以省略。A 解析句意:我的同桌無疑是我們班上最聰明的學生,他總是能夠解答出那些數(shù)學難題。根據(jù)and前的分句可知,這里用情態(tài)動詞can表示能力,意為“能,會”。-42-16.One visitor suggested that the museum set up a m

45、odel train area to attract more children.A.shouldB.couldC.might D.would17.My friend stares at me as though I a complete stranger.A.amB.wereC.would beD.have beenA 解析句意:一個游客建議博物館應該設立一個模型火車區(qū)域來吸引更多的孩子。在suggest意為“建議”后的賓語從句中應用虛擬語氣,從句謂語用“should+動詞原形”,should可以省略。故選A項。B解析句意:我的朋友盯著我看,好像我完全是個陌生人。as though表示“好像

46、”,在此引導的狀語從句要用虛擬語氣,根據(jù)主句時態(tài)可知這里是對現(xiàn)在情況的虛擬,應用一般過去時(be動詞用were)。故選B項。-43-18. you come across Tom,tell him I could visit him recently.A.ShouldB.WouldC.CouldD.Might19.But for your error,it easier for you to pass the driving test.After all,you had high-quality training.A.must have beenB.should beC.might have

47、beenD.could beA 解析句意:你如果碰見湯姆的話,告訴他我最近會去拜訪他。此處是省略if的虛擬條件句,Should you come across Tom=If you should come across Tom。C解析句意:要不是你的失誤,你也許能更輕松地通過駕照考試。畢竟,你有高質量的訓練。根據(jù)語境,這里表示對過去情況的虛擬,句子謂語動詞應用might/could/should/would have done。故選C項。-44-20.If all the audience what was deeply hidden in Joes speech,Im sure he wou

48、ld have won first place.A.had understood B.would understand C.understood D.understands21.After having been homeless for five years,it is about time you down.Im thinking about it.A.had settledB.settledC.should have settledD.settleA 解析句意:如果所有的聽眾都能理解藏在喬的演講背后的深意,那么我確信他能拿第一名。由主句中的“would have won first pl

49、ace”可知,這里表示“與過去事實相反的虛擬語氣”,因此應用過去完成時(had done)。B解析句意:流浪了五年后,現(xiàn)在你該安定下來了。我正在考慮。在“It is about time (that).”句型中,從句謂語動詞常用過去式或“should+動詞原形”,should不可省略。-45-22.It sounds like a wonderful match.How I wish I it like you.A.watchB.have watchedC.would watch D.had watchedD 解析句意:那聽起來是一場精彩的比賽。我多么希望像你一樣已經觀看了這場比賽。根據(jù)語境可

50、知,比賽已經結束了,wish后面的賓語從句表示的是對過去的事情的虛擬,故用過去完成時。23.If it the climate,I would stay here much longer.A.is not forB.had not been forC.were not forD.would not be forC 解析這是帶if虛擬條件句的虛擬語氣,主句的謂語是“would+動詞原形(stay)”,表示與現(xiàn)在的事實相反的主觀愿望。這個虛擬條件句也是與現(xiàn)在的情況相反的主觀假設,故用were not for。-46-24.It was playing video games that took t

51、he boy too much time that he have spent learning.A.couldB.mustC.mightD.ought toD解析句意:正是玩電腦游戲花去了這個孩子太多的時間,而這些時間是他應該用來學習的。此處表示與過去情況相反的虛擬語氣,用ought to have done表示“本來應該做某事而實際上沒有做”。could have done“本來能夠做某事而實際上沒有做”,不符合題意。must和might用來表示猜測,不是虛擬。25.Youd better pull your car over to the side of the road if you answer a phone call.A.must B.willC.canD.mayA 解析句意:如果你非要接電話的話,你最好把車開到路邊。根據(jù)句意可知此處要用must,表示“偏要”。