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1、 走向高考· 英語(yǔ)外研版· 高考總復(fù)習(xí)吾將上下而求索路漫漫其修遠(yuǎn)兮第二部語(yǔ)法專(zhuān)項(xiàng)突破第二部語(yǔ)法專(zhuān)項(xiàng)突情態(tài)動(dòng)詞與虛擬語(yǔ)氣 1考綱解讀3知識(shí)歸納 42析題分命練專(zhuān)法語(yǔ)考 考點(diǎn)考綱解讀掌握can,could的用法,并能與其他表示推測(cè)的的用法can情態(tài)動(dòng)詞在語(yǔ)氣上進(jìn)行區(qū)分。掌握will,would,shall,should,ought to的意should的用法義和用法,特別是表示判斷、允諾、斥責(zé)等語(yǔ)氣以及在虛擬語(yǔ)氣中的用法。掌握must,need,dare的用法,特別是表示推測(cè)的語(yǔ)氣和用法,特別是“情態(tài)動(dòng)詞havemust的用法p.p.”的用法和意義。掌握may,might的用法

2、,特別是表示推測(cè)的語(yǔ)的用法may氣和用法。掌握if條件從句,as if引導(dǎo)的從句,wish后面的賓語(yǔ)從句中虛擬語(yǔ)氣的用法;掌握insist,虛擬語(yǔ)氣等后的從句中虛擬語(yǔ)氣的用法。order,suggest命 情態(tài)動(dòng)詞一直是高考英語(yǔ)單項(xiàng)填空中非常重要的一個(gè)語(yǔ)法項(xiàng)目。高考對(duì)情態(tài)動(dòng)詞的考查主要有:(1)情態(tài)動(dòng)詞的基本用法;(2)情態(tài)動(dòng)詞表示推測(cè);(3)“情態(tài)動(dòng)詞havedone”結(jié)構(gòu)。高考對(duì)虛擬語(yǔ)氣的考查力度呈現(xiàn)出了上升趨勢(shì),含蓄條件句和特殊結(jié)構(gòu)中的虛擬語(yǔ)氣將是語(yǔ)法填空的一個(gè)考查重點(diǎn)。知 情態(tài)動(dòng)詞一、考點(diǎn)知識(shí)歸納考點(diǎn)一情態(tài)動(dòng)詞表示推測(cè)和可能性1情態(tài)動(dòng)詞can可用于肯定句中表示客觀的(理論的)可能性,也

3、可以表示“一時(shí)或暫時(shí)的”情況,而表示具體事情實(shí)際發(fā)生的可能性時(shí),can一般不用于肯定句中。如:Accidents can happen on such rainy days.這樣的多雨天氣可能會(huì)發(fā)生事故。(客觀的可能性)Peter may come with us tonight,but he isn't sure yet.彼得今晚可能來(lái)我們這兒,但他還沒(méi)確定。(實(shí)際可能can)性,不用 表示具體事情實(shí)際發(fā)生的可能性:2)(見(jiàn)下表(1)表示具體事情實(shí)際發(fā)生的可能性的層次比較詞形肯定式否定式疑問(wèn)式/must/必定,必然will會(huì)嗎?很可能,大概不會(huì),不該語(yǔ)氣比would可能性比will小

4、語(yǔ)氣比will弱弱won'tshould應(yīng)該嗎?按說(shuō)不應(yīng)該按說(shuō)應(yīng)該 詞形肯定式否定式疑問(wèn)式ought to /按說(shuō)應(yīng)該can/有可能嗎?不可能could語(yǔ)氣比can弱不可能微弱的可能或許,也許,也未/may可能不可知,也說(shuō)不定may not比/might還弱may比還弱 (2)表示具體事情實(shí)際發(fā)生的可能性時(shí),may,must常用于肯定句中,一般不用于否定句和疑問(wèn)句中(may not表示“可能不”);can常用于否定句、疑問(wèn)句或感嘆句中,表示疑惑、驚訝或不相信等意思;could既可用于肯定句中,又可用于否定句、疑問(wèn)句中。如:This can't/couldn't be d

5、one by him.這不可能是他干的。(表不相信)This may not be done by him.)表不確定(這可能不是他干的。 He could be on his way home now.他現(xiàn)在可能在回家的路上。(could不如may/might常用)Can this be done by him?這可能是他干的嗎?(表示疑惑、驚訝)I didn't hear the phone.I must have been asleep.我沒(méi)聽(tīng)見(jiàn)電話鈴響。當(dāng)時(shí)我一定睡著了。(表肯定)Are you going to Jeff's party?你要去參加杰弗的聚會(huì)嗎?I&#

6、39;m not sure.I might go to the concert instead.)表不確定(我不確定。我可能去聽(tīng)音樂(lè)會(huì)。 (3)would, could, should, might并不一定與過(guò)去時(shí)間有關(guān),而表示可能性弱于它們相應(yīng)的現(xiàn)在時(shí)形式。如:This may/might be done by him.這件事有可能是他干的。(語(yǔ)氣依次遞減)(4)should用來(lái)表示推測(cè)時(shí)意為“應(yīng)該”,即含有“按道理來(lái)說(shuō)應(yīng)當(dāng)如此”的意思。 (5)表示對(duì)現(xiàn)在正在發(fā)生的事情進(jìn)行推測(cè)要用“情態(tài)動(dòng)詞be現(xiàn)在分詞”這種結(jié)構(gòu)。這種結(jié)構(gòu)在高考題中出現(xiàn)的次數(shù)不太多,但也要引起注意。如:My mother m

7、ust be watering the flowers in the garden now.我媽媽現(xiàn)在肯定正在花園里澆花。The students may be climbing the mountain at the moment.此刻學(xué)生們可能正在登山。3情態(tài)動(dòng)詞后跟完成式表示對(duì)過(guò)去事情的推測(cè)參見(jiàn)考點(diǎn)三。 考點(diǎn)二情態(tài)動(dòng)詞表示必要性must常用來(lái)表示必要性,意為“必須”。表示現(xiàn)在或?qū)?lái)必須做某事用“must動(dòng)詞原形”;表示現(xiàn)在或?qū)?lái)不必做某事時(shí),用don't have to do sth.或don't need to do sth.或needn't do sth.;表

8、示過(guò)去沒(méi)必要做某事時(shí),分為以下情況:表示過(guò)去沒(méi)必要做某事,但事實(shí)上卻做了,用needn't have done sth.表示過(guò)去沒(méi)必要做某事,而不涉及是否做,可用didn't have to do sth.或didn't need to do sth.或It was not necessary to do sth.等。如: You needn't have worked that late last night.It was harmful to your health.你昨晚不必工作到那么晚。那對(duì)你的身體沒(méi)好處。Did you work very late l

9、ast night?你昨天晚上工作到很晚嗎?No, I didn't. I didn't need to work very late.不是很晚。我沒(méi)必要工作到很晚。should也可以表示必要性,意為“(義務(wù)上)應(yīng)該”。should表示必要性時(shí),在語(yǔ)氣上比must(必須)弱?!皊hould動(dòng)詞原形”,表示現(xiàn)在或?qū)?lái)應(yīng)該做某事(的必要性);“shouldhave。如:)的必要性(過(guò)去分詞”,表示過(guò)去本該做某事 I should go and visit him this afternoon, but I wonder if I will be free.今天下午我應(yīng)該去看望他,但

10、我不知道我是否有空。(表示將來(lái)的必要性)You should have come to the conference yesterday. What was the reason for your absence?你昨天應(yīng)該參加那個(gè)會(huì)議。你缺席的原因是什么?(表示)過(guò)去的必要性 表示推測(cè)、必要性等用法情態(tài)動(dòng)詞完成式”“考點(diǎn)三一覽情態(tài)動(dòng)詞用法例句完成式表示對(duì)過(guò)去已經(jīng)發(fā)生mustThe lights were out. They must 的行為進(jìn)行推測(cè),意have donehave been asleep.一定/準(zhǔn)是為“想必做了某事”。I saw Mr.Wang just now. He 表示對(duì)

11、過(guò)去發(fā)生的行can/couldcouldn't have gone to Beijing.為的懷疑和不肯定,have doneCan he have gone to his 通常用在否定句和疑?uncle's問(wèn)句中。 情態(tài)動(dòng)詞用法例句完成式可用于肯定句中,表示對(duì)過(guò)You could have done could去沒(méi)有實(shí)現(xiàn)的事情的遺憾或better, but you were too have done責(zé)備,意為“本來(lái)可以,本careless.能夠”。It's too late. I think he 表示對(duì)過(guò)去已發(fā)生行為的推may have gone to bed.測(cè)

12、,用于肯定句中,表示may/mightHe may not have “也許已經(jīng)”;在否定(not)have finished the work.句中表示“可能不”,不用doneShe might have caught 則表示于疑問(wèn)句中。用mighta cold.語(yǔ)氣更加不肯定。 情態(tài)動(dòng)詞用法例句完成式Y(jié)ou should have 用于肯定句中,表示come to the meeting should/ought “本該做某事,而實(shí)際earlier.(not)to have 上卻未做”;用于否定He ought not to done句中,則表示“不該做have treated his 的

13、事反而做了”。parents like that.肯定式表示“本來(lái)有必You needn't have need/needn't要做某事”;否定式表taken a taxi, for it have done示“做了本來(lái)不必去做was very near.的事”。 情態(tài)動(dòng)詞用法例句完成式用于事后的建議,含輕微責(zé)備的口吻,意為“當(dāng)時(shí)You'd better not had better最好做了某事”,其否定have scolded her.have done表had better not have done式達(dá)相反的含義。表示“當(dāng)時(shí)寧愿做了某I would rather

14、would rather事”;其否定式表達(dá)相反have taken her have done含義。兩者都表示“后advice.悔”之意。 考點(diǎn)四 情態(tài)動(dòng)詞其他常考點(diǎn)一覽 1表示能力 ?can?表現(xiàn)在的能力?be able to?表將來(lái)的能力will be able to? could?表過(guò)去的能力?was/were able to?過(guò)去分詞:表示過(guò)去有能力做但卻未做could have? 如:I am starving to death. I can eat two bowls of rice now.我快餓死了,現(xiàn)在我能吃?xún)赏朊罪垺?現(xiàn)在的能力)If you have a good sle

15、ep, you will be able to work out this problem.如果你好好睡一覺(jué),你將能夠解出這道題。(將來(lái)的能力)The fire spread through the hotel very quickly but everyone was able to get out.盡管這場(chǎng)大火迅速蔓延到了整個(gè)賓館,但是每個(gè)人都能夠逃出去。(過(guò)去有能力做并且成功地做了某事)I could have worked out the problem,but l didn't.我本來(lái)可以解決這個(gè)問(wèn)題,但沒(méi)有解決。(過(guò)去有能力做)但卻未做 2表示請(qǐng)求、允許、允諾當(dāng)對(duì)方是決策者

16、時(shí),你代表你(們)自己(I,we),或代表第三者(he,she,they)向?qū)Ψ?you)請(qǐng)示或提出建議時(shí)用(shall常用于一、三人稱(chēng),will/would常用于第二人稱(chēng)):Shall/May(Might)/Can(Could)I/we.?Shall he/she/they.?Would/Will you.?如:Shall we begin our class?我們可以開(kāi)始上課嗎?Shall the driver wait outside?司機(jī)在外邊等著可以嗎? When shall my father be able to leave hospital?我父親什么時(shí)候可以出院?Would

17、you do me a favor?請(qǐng)幫我一下,好嗎?could/might/would/should表委婉的語(yǔ)氣。如:Could/Might I use your bike tomorrow morning?明天上午我能用一下你的自行車(chē)嗎?Yes,you can/may.(No,I'm afraid not.)不,恐怕不行。(行,你可以用。 不可說(shuō):Yes,you could/might.回答允許時(shí),用could/might表委婉是不恰當(dāng)?shù)?。如:Could I borrow your dictionary?我能借你的詞典嗎?Yes,of course you can.是的,當(dāng)然可以。

18、當(dāng)你自己()是決策者,給對(duì)方(you)或第三者(he,she,they)以命令、警告、允諾或威脅時(shí),要用shall。此外,當(dāng)頒布。如:shall法律、規(guī)定時(shí),也要用 You shall leave the room at once,and he also shall.(I order you and him to leave the room at once.)你馬上滾出去,他也一樣。(說(shuō)話者的命令)It has been announced that candidates shall remain in their seats until all the papers have been c

19、ollected.在所有試卷收上來(lái)之前,應(yīng)試者必須留在座位那里。(規(guī))則或規(guī)定 3其他用法(1)“can not but動(dòng)詞原形”表示“不得不,只好”。如:I can not but choose to go.我只好去。(2)may well和may/might as well結(jié)構(gòu)“may well動(dòng)詞原形”是一種常用結(jié)構(gòu),意為“完全能,很可能”,相當(dāng)于be very likely to。如:Her appearance has changed so much that you may well not recognize her.她的模樣變化太大,你很可能認(rèn)不出她了。 “may/might

20、as well動(dòng)詞原形”意為“最好,滿可以,不如”。如:You may as well do it at once.你最好馬上就做這件事。cannot(或never等否定詞)與enough連用表示“再也不為過(guò)”。如:You cannot be careful enough to cross the road.過(guò)馬路時(shí)你怎么小心都不為過(guò)。may可以用于祈使句中,表示祝愿。如:May you return in safety.愿你平安歸來(lái)。 “Why/Howshould”結(jié)構(gòu)表示說(shuō)話人對(duì)某事不能理解、感到意外、驚異等,意為“竟會(huì)”。如:Why should you be so late today

21、?你今天怎么來(lái)得這么晚?How should I know?我怎么會(huì)知道?(意為:我不知道。)must表示“偏要、硬要(做某事)”。如:Must you make so much noise?你非得弄出這么多噪音嗎? 考點(diǎn)五情態(tài)動(dòng)詞常規(guī)用法1can和could(could為can的過(guò)去式)的基本用法(1)表示能力;(2)在疑問(wèn)句和否定句中表示“懷疑,猜測(cè)”或“可能性”;(3)表示“許可”時(shí)can可以和may換用;(4)如果要表示委婉的語(yǔ)氣,可用could代替can,這時(shí)could不再是can的過(guò)去式;(5)can和be able to都可表示能力。但是can只有現(xiàn)在式和過(guò)去式,而be able

22、 to則有更多的形式;can表示有能力做某事,而則表示通過(guò)努力,克服困難做成某事。be able to 2may和might(might為may的過(guò)去式)的基本用法(1)表示允許或征詢(xún)對(duì)方許可,有“可以”之意。如:You may use my dictionary.在回答對(duì)方說(shuō)“可以做某事”或“不可以做某事”時(shí),一般不用may或may not,以避免語(yǔ)氣生硬,而是用比較婉轉(zhuǎn)的說(shuō)法進(jìn)行回答。如:May I use this dictionary?Yes,please.或I'm afraid not.在請(qǐng)求對(duì)方許可時(shí),如果用Might I.就比用May I.語(yǔ)氣更婉轉(zhuǎn)些。如:Might I

23、 have a look at your new computer?但是表示“阻止”或“禁止”對(duì)方做某事時(shí),要用must not代替may not。如:May I swim in this you mustn't. It's too dangerous.,No?lake (2)may和might都可以表示可能性,表示“或許,可能”之意,如果用might表示可能性,則語(yǔ)氣更加不肯定。如:They may(might)be in the library now.3must的基本用法(1)must表示“必須,應(yīng)該”之意,其否定式為must not,縮寫(xiě)形式為mustn't,表

24、示“不準(zhǔn),不許可,禁止”之意。如:We must study hard and make progress every day./You mustn't touch the fire. (2)對(duì)以must開(kāi)頭的疑問(wèn)句作否定回答時(shí),要用needn't或don't (doesn't) have to,而不用mustn't,因?yàn)閙ustn't表示的是“禁止,不許可”之意。如:Must we finish the work tomorrow?No,you needn't(don't have to),but you must finish

25、 it in three days.(3)在肯定句中must可以表示推測(cè),表示“一定,必定”之意。如:Whose new bike can it be?s.His father just bought him a new one.'It must be Liu Dong 4have to的基本用法have to和must的意思相近,只是must側(cè)重表示說(shuō)話人的主觀看法,而have to則表示客觀需要。如:I must study hard./I had to give it up because of illness.5ought to的基本用法(1)表示義務(wù),意為“應(yīng)當(dāng)”,語(yǔ)氣比sh

26、ould強(qiáng)。如:Everyone ought to obey the traffic regulations.(2)表示推測(cè),注意與must表示推測(cè)時(shí)的區(qū)別:He must be home by now.(斷定他已到家)/He ought to be home by now.(不十分肯定)/This is where the oil must be.(比較直率)/This is where )比較含蓄the oil ought to be.( (3)在美國(guó)英語(yǔ)中ought to用于否定句和疑問(wèn)句時(shí)to可以省略。如:Ought you smoke so much?/You oughtn'

27、t smoke so much.的基本用法dare6(1)dare作情態(tài)動(dòng)詞時(shí),主要用于否定句、疑問(wèn)句和條件句中。如:Dare he break the traffic regulations again?(2)在現(xiàn)代英語(yǔ)中dare常作實(shí)義動(dòng)詞,其用法與其他實(shí)義動(dòng)She dares to stay at home alone at night.詞相同。如: 7need的基本用法(1)need作情態(tài)動(dòng)詞時(shí),主要用于否定句和疑問(wèn)句和條件句中。如:He needn't worry about us now.(2)need也可作實(shí)義動(dòng)詞,用于肯定句、否定句和疑問(wèn)句中,其后可接名詞、代詞、動(dòng)名詞

28、或帶to的動(dòng)詞不定式作賓You need to practise reading aloud every day.語(yǔ)。如: 8shall的基本用法(1)shall用于第二、第三人稱(chēng)時(shí),表示說(shuō)話人的意愿,可表示命令、警告、強(qiáng)制、威脅或允諾等。如:He shall go first,whether he wants to or not.(2)在疑問(wèn)句中,shall用于第一、第三人稱(chēng),表示說(shuō)話人征詢(xún)對(duì)方意見(jiàn)或請(qǐng)求指示。如:Shall I open the door?(3)在比較正式的書(shū)面語(yǔ)中,如法律條文中所規(guī)定的權(quán)利或來(lái)表示。shall義務(wù)往往用 典例示例What does the sign ove

29、r there read?No person _ smoke or carry a lighted cigarette,cigar or pipe in this area.。shall答語(yǔ)所表達(dá)的是警告,故選shall剖析: 9should的基本用法(1)should可以表示建議或勸告,表示“應(yīng)該”之意。如:You should learn from each other.(2)should可以用在條件狀語(yǔ)從句中,表示語(yǔ)氣較強(qiáng)的假設(shè),譯作“萬(wàn)一,竟然”,這時(shí)也可將should置于從句之首,即將should放在主語(yǔ)前面,而省略if。如:If anyone should 萬(wàn)一有人來(lái)say I a

30、m not at home.,Should anyone come)come(訪,就說(shuō)我不在家。還可以表示謙遜、客氣、委婉之意,譯為(3)shouldI should say that it would be better to “可,倒”。如:我倒是認(rèn)為最好再試一試。try it again. 10will的基本用法(1)用于各種人稱(chēng),可以表示意志或決心。如:I have told him again and again to stop smoking,but he will not listen.(2)在疑問(wèn)句中,用于第二人稱(chēng),表示說(shuō)話人向?qū)Ψ教岢稣?qǐng)求或詢(xún)問(wèn)對(duì)方的意愿。如:Will you

31、 please tell me how to get to the Capital Gymnasium?(3)will可以表示一種習(xí)慣性的動(dòng)作,有“總是”或“總要”之意。如:Every morning he will have a walk along this river. 11would的基本用法(1)would作為will的過(guò)去式時(shí),可用于各種人稱(chēng),表示過(guò)去的意志或決心。如:He promised he would never smoke again.(2)在疑問(wèn)句中,用于第二人稱(chēng),表示說(shuō)話人向?qū)Ψ教岢稣?qǐng)求或詢(xún)問(wèn)對(duì)方的意愿,語(yǔ)氣比will委婉。如:Would you like some

32、more coffee?(3)在日常生活中,用“I would like to.”表示“我想要”或“我愿意”之意,以使語(yǔ)氣委婉。如:I would like to do Exercise 2 first. (4)would可以表示過(guò)去的習(xí)慣性動(dòng)作,比used to正式,但沒(méi)有“現(xiàn)已無(wú)此習(xí)慣”的含義。如:Last year our English teacher would sometimes tell us stories in English after class.(5)表猜測(cè)。如:It would be about ten when he left home./What would sh

33、e be doing there?/I thought he would have told you about it. 12used to,had better,would rather的基本用法(1)used to表示過(guò)去的習(xí)慣性動(dòng)作或狀態(tài),現(xiàn)在已不存在。在間接引語(yǔ)中,其形式可以不變。如:He told us he used to play football when he was young.在疑問(wèn)句、否定句、否定疑問(wèn)句中,可有兩種形式。疑問(wèn)句:Did you use to/Used you to go to the same school as your brother?否定句:I u

34、sedn'tto/didn't use to go there.(usedn't也可寫(xiě)作usen't)否定疑問(wèn)句:Usen't you to/Didn'tyou use to be interested in the theatre?在其反義疑問(wèn)句或簡(jiǎn)略回答中,也有兩種形式。如:She used to be very fat,didn't/use(d)n't she?/Used you to get up used to.I did/,Yes?early in the morning (2)hadbetter意為“最好”,后接不帶

35、to的不定式。如:Wehadbettergonow.Yes,wehad(we'dbetter/wehadbetter)/Hadn'twebetterstopnow?(Hadwebetternotstopnow?)/IthinkI'dbetterbegoing.(用于進(jìn)行時(shí)態(tài),表示“最好立即”)/Youhadbetterhavedonethat.(用于完成時(shí)態(tài),表示未完對(duì)同輩或晚輩使用,對(duì)長(zhǎng)輩不可用。betterhad)成的動(dòng)作 (3)wouldrather意為“寧愿”,表選擇,后接不帶to的不定式。如:I'drathernotsayanything./Would

36、youratherworkonafarm?/Wouldn'tyouratherstayhere?No,Iwouldnot.I'drathergothere.wouldrather表選擇,其后可接than。如:Iwouldratherworkonafarmthaninafactory./IwouldratherwatchTVthangotoseeafilm./I'dratheryoudidn'ttalkaboutthistoanyone. 二、方法技巧總結(jié)方法一:語(yǔ)境分析法情態(tài)動(dòng)詞體現(xiàn)的是說(shuō)話人的一種語(yǔ)氣,所以在解答此類(lèi)問(wèn)題時(shí),一定不能單憑翻譯,一定要注意說(shuō)話者的

37、語(yǔ)氣,結(jié)合具體的情境來(lái)進(jìn)行分析。并且要運(yùn)用已有的知識(shí),作出正確合理的判斷。如,表示請(qǐng)求許可時(shí),常分為三種情況:can/could/may/might多與I連用。would/will多與you連用。多與第一、三人稱(chēng)連用。shall 典題示例_ he come to see you?剖析:Shall從形式上看,這是一個(gè)問(wèn)句,是對(duì)請(qǐng)求許可的考查,從人稱(chēng)上看是第三人稱(chēng),所以用shall表提議。(2010·四川改編)_ I take the book out?I'm afraid not.剖析:May句意:“我可以將這本書(shū)帶出去嗎?”“恐怕不行”。從句意可以看出,這是對(duì)“請(qǐng)求許可”的考

38、符合句意。may查,用 提示:若表示推測(cè)又可分為幾種情況:can't表示“不可能”;can用于疑問(wèn)句時(shí)表示“可能嗎?”;may/might用于肯定句,表示“可能”(語(yǔ)氣不強(qiáng)烈,而且有語(yǔ)境提示);may/mightnot表示“可能不”,也有語(yǔ)境提示;must用于肯定句,表示“一定”,語(yǔ)氣強(qiáng)烈;should用于肯定句,表示“排除特殊情況下按說(shuō)/理應(yīng)該”;can用于肯定句時(shí),表示“客觀上理論上的可能性”,即理論上看是可能的,但實(shí)際未必發(fā)生,也可表示“一時(shí)或暫時(shí)的情況”;mustn't不是表推測(cè)的用法,而是“禁止干某事”。 It's usually warm in my hom

39、etown in March,but it _ be rather cold sometimes.剖析:can句意:三月份,我的家鄉(xiāng)通常比較溫暖,但用在肯定句中表示“一時(shí)的或can有時(shí)也非常寒冷。本題考查暫時(shí)的情況”。 方法二:正確把握某些情態(tài)動(dòng)詞的特殊用法。在有些情況下,可能用好幾個(gè)情態(tài)動(dòng)詞都合理,但有些情況下,必須是唯一的。如:can not(never)動(dòng)詞tooadvadj./adv.)動(dòng)詞(enough(.adj/再.,can not(never)也不為過(guò));can't help doing(禁不住干);can't help but do./can not but d

40、o(不得不做);may/might well(很可能);may/might as well(還是為好);How could it be.(怎么可能);Why/How should(人稱(chēng)代詞he,she.)陳述句(表示說(shuō)話人對(duì)某事感到意外);should表示“竟然”,must表示“硬要,一定要”。 典題示例My mother is a great cook and we _ never get enough of her cookies.剖析:can句意:我媽媽是個(gè)很棒的廚師,我們永遠(yuǎn)吃連用,表示“再enough與not/nevercan 不夠她做的餅干。也不為過(guò)”。 Mr.Bush is on

41、 time for everything.How_ it be that he was late for the opening ceremony?剖析:could句意:布什先生干任何事情都很守時(shí),開(kāi)幕could it be.?“怎么可式他遲到了,這怎么可能?How 能?”為常用搭配。若第二句改為How _ he be late 表示“竟然”。should?就應(yīng)該選用for the opening ceremony 虛擬語(yǔ)氣一、考點(diǎn)知識(shí)歸納虛擬語(yǔ)氣在非真實(shí)條件句中的應(yīng)用考點(diǎn)一虛擬條件句主句If主語(yǔ)動(dòng)詞的過(guò)主語(yǔ)should/would/ 與現(xiàn)在事實(shí)could/might動(dòng)詞原形were)動(dòng)詞用(

42、be去式相反的假設(shè)主語(yǔ)should/would/ 過(guò)If主語(yǔ)had與過(guò)去事實(shí)could/mighthave過(guò)去分詞相反的假設(shè)去分詞 虛擬條件句主句If主語(yǔ)動(dòng)詞過(guò)去式(be與將動(dòng)詞用were)主語(yǔ)來(lái)事should/ 動(dòng)詞If主語(yǔ)were towould/could/might實(shí)相原形動(dòng)詞原形反的If主語(yǔ)should動(dòng)詞假設(shè)原形 If I had time, I would attend the meeting.如果有時(shí)間,我就會(huì)參加會(huì)議。If I were you, I should seize the opportunity to go abroad.如果我是你,我就該抓住這次出國(guó)的機(jī)會(huì)。If

43、 I had taken your advice,I would not have failed in the exams.如果我聽(tīng)了你的勸告,我就不會(huì)考試不及格了。 If you came tomorrow,we would have the meeting.如果你明天來(lái),我們就開(kāi)會(huì)。If it were to rain tomorrow,the sports meeting would be put off.如果明天下雨,運(yùn)動(dòng)會(huì)將會(huì)推遲。If he should not come tomorrow,we should put off the meeting till next Monday

44、.如果他明天不來(lái),我們就將會(huì)議推遲到下周一。 使用虛擬條件句時(shí)要注意以下幾點(diǎn):1在條件句中的省略如果虛擬條件句中含有were,should,had三個(gè)詞,可將if省略,把這三個(gè)詞前置到主語(yǔ)之前,形成部分倒裝。如:If I were in your position,I would do the same.Were I in your position,I would do the same.如果我處于你的位置,我也會(huì)這樣做。 If you had come earlier,you would have met her.Had you come earlier,you would have me

45、t her.如果你早點(diǎn)來(lái),你就會(huì)見(jiàn)到她了。If he should come tomorrow,I would give him the dictionary.Should he come tomorrow,I would give him the dictionary.如果他明天來(lái),我就把這本詞典給他。 2錯(cuò)綜時(shí)間虛擬句當(dāng)條件狀語(yǔ)從句表示的行為和主句表示的行為所發(fā)生的時(shí)間不一致時(shí),這種虛擬條件句稱(chēng)為錯(cuò)綜時(shí)間虛擬句。動(dòng)詞的形式要根據(jù)它所表示的時(shí)間作出相應(yīng)的調(diào)整。如:If you had taken the doctor's advice,you would be better now.

46、如果你聽(tīng)從了醫(yī)生的建議,你現(xiàn)在就會(huì)好多了。If you had studied hard before,you would be a college student now.如果你以前努力學(xué)習(xí),你現(xiàn)在就是一名大學(xué)生了。 3含蓄條件句有時(shí)假設(shè)的情況并不以條件句表示出來(lái),而是暗含在上下文中,比如通過(guò)with,without,but for,otherwise,or等詞或短語(yǔ)來(lái)表示。如:What would you do with a million dollars?(if you had a million dollars)你會(huì)用一百萬(wàn)美元來(lái)干什么?We couldn't have fin

47、ished the work in time without your help.(if we hadn't got your help)沒(méi)有你的幫助我們不會(huì)及時(shí)完成這項(xiàng)工作。 I was so busy then.Otherwise,I would have told him the answer.(If I had not been so busy then)那時(shí)我是如此的忙。否則我會(huì)告訴他答案的。He telephoned to inform me of your birthday,or I would have known nothing about it.(If he had

48、 not telephoned to inform.)他打電話告知我你的生日,否則我會(huì)對(duì)此一無(wú)所知。 考點(diǎn)二虛擬語(yǔ)氣在其他從句中的應(yīng)用1虛擬語(yǔ)氣在主語(yǔ)從句中的用法在“It is important (strange, natural, necessary,.)that.”句型中,that所引導(dǎo)的主語(yǔ)從句中的謂語(yǔ)動(dòng)詞常用“should動(dòng)詞原形”結(jié)構(gòu),should可以省略,表示某事是“重要的”;“奇怪的”;“自然的”;“必要的”等。如:It is important that every member (should) inform himself of these rules.重要的是每個(gè)成員都

49、應(yīng)該知道這些規(guī)則。 2虛擬語(yǔ)氣在賓語(yǔ)從句中的用法(1)虛擬語(yǔ)氣用在動(dòng)詞wish后的賓語(yǔ)從句中,表示與現(xiàn)在或過(guò)去的事實(shí)相反,或?qū)?lái)的一種主觀愿望,從句通常省略連詞that。表示對(duì)現(xiàn)在情況的虛擬:從句謂語(yǔ)動(dòng)詞用過(guò)去式(be動(dòng)詞一般用were)。如:I wish I knew the answer to the question.我希望知道這個(gè)問(wèn)題的答案。(可惜不知道);表示對(duì)過(guò)去情況的虛擬:從句謂語(yǔ)動(dòng)詞常用“had過(guò)去分詞”。如:I wish(wished) I hadn't spent so much money.我后悔不該花那么多錢(qián)。 (實(shí)際上已經(jīng)花掉了);表示對(duì)將來(lái)的一種主觀愿望:

50、從句謂語(yǔ)動(dòng)詞常用“would動(dòng)詞原形”。此時(shí)要注意,主句的主語(yǔ)與從句的主語(yǔ)不能相同,因?yàn)橹骶涞闹髡Z(yǔ)所期望的是從句動(dòng)作能否實(shí)現(xiàn),而這取決于從句主語(yǔ)的態(tài)度或意愿(非動(dòng)物名詞除外)。如;I wish it would stop raining.但愿雨能停止。I wish you would come soon.但愿你能立刻來(lái)。 (2)在suggest,demand,order,propose,insist,command,request,desire等動(dòng)詞后的賓語(yǔ)從句中,謂語(yǔ)動(dòng)詞用“(should)動(dòng)詞原形”,表示建議、要求、命令等。如:I demand that 我要求他立刻答復(fù)我。he(should)answer me immediately. 3虛擬語(yǔ)氣在表語(yǔ)從句和同位語(yǔ)從句中的用法在suggestion,demand,order,proposal,request,advice等名詞后的表語(yǔ)從句和同位語(yǔ)從句中要用虛擬語(yǔ)氣,謂語(yǔ)動(dòng)詞用“(should)動(dòng)詞原形”。如:We all agree to his suggestion that we(should)g

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