情態(tài)動(dòng)詞和虛擬語氣_高考英語_語法

1、情態(tài)動(dòng)詞和虛擬語氣情態(tài)動(dòng)詞和虛擬語氣一一.shall 和和should1Shall(1) 用在一、三人稱的疑問句中用在一、三人稱的疑問句中, 表示征求對方表示征求對方 的意見或指示。的意見或指示。 E g. Shall we go out for a walk ? Has Mr. Wang arrived? Yes，already. Shall he wait outside or just come in?考點(diǎn)一：情態(tài)動(dòng)詞的基本用法考點(diǎn)一：情態(tài)動(dòng)詞的基本用法 (2) 用于二、三人稱陳述句中，表示命令、許諾、用于二、三人稱陳述句中，表示命令、許諾、 威脅、決心、法律條文上的許可或要求等。威脅、

2、決心、法律條文上的許可或要求等。 E g. You shall go to the front at once.Dont worry. You shall get the answer this very afternoon.The school rules state that no child shall be allowed out of the school unless accompanied by an adult.You shall not get my support if you do such a thing. 2. should(1) ( 表義務(wù)，責(zé)任表義務(wù)，責(zé)任) 應(yīng)該

3、應(yīng)該You should apologize to him.(2) (表示預(yù)測可能性表示預(yù)測可能性) 可能，可能，(按道理說按道理說)應(yīng)該應(yīng)該Its nearly 7 oclock. Jack should be here at the moment.(3) 竟然，居然竟然，居然I am surprised that you should speak in such a way.I can never imagine an honest boy like him should cheat in the exam. (4) 一一 旦旦, 萬一萬一Should you change your mi

4、nd, let me know.If it should rain tomorrow , we would stay at home.二二can 和和could （1）(表示能力表示能力)能能/會會（區(qū)別（區(qū)別can, could和和be able to）A computer cant think itself.I could swim all the way across the lake, but I cant now.（2）(表示許可表示許可)You can go out when you finish your homework.(3) (表示推測，常用在否定句和疑問句中）表示推測，常

5、用在否定句和疑問句中）Who can it be at this time of day?Theres no light on-they cant be at home .(4) (表示請求表示請求) 能不能能不能Can you give me a lift to the station? (5)(表示平時(shí)或大部分時(shí)間不是這樣表示平時(shí)或大部分時(shí)間不是這樣)有時(shí)會有時(shí)會(6)固定搭配固定搭配1). cannot.too/enough 表示表示“無論無論也不也不 過分過分”“”“越越越好越好”You cant be too careful while driving.You cant be car

6、eful enough while driving.2). cant help doing sth.3). cant ( help /choose ) but do sth. The experienced teacher can make mistakes sometimes.三三.will與與would(1)表示意愿或決心（表示意愿或決心（would 用于過去的情況）用于過去的情況）I will never do that again.I have told him again and again to stop smoking，but he wont listen.(2008北京卷北京卷

7、)John promised his doctor he would not smoke，and he never smoked ever since. (2)表示請求表示請求 Will you help me with the work? Would you mind if I opened the window?(3)表示一種經(jīng)常性、習(xí)慣性的動(dòng)作表示一種經(jīng)常性、習(xí)慣性的動(dòng)作would可表示過去反復(fù)發(fā)生的動(dòng)作或某種傾向，后面接表示動(dòng)可表示過去反復(fù)發(fā)生的動(dòng)作或某種傾向，后面接表示動(dòng) 作的動(dòng)詞作的動(dòng)詞,不能接表示狀態(tài)的詞不能接表示狀態(tài)的詞; used to表示過去的習(xí)慣動(dòng)作或狀表示過去的習(xí)慣動(dòng)作

8、或狀態(tài)，強(qiáng)調(diào)現(xiàn)在已不存在。態(tài)，強(qiáng)調(diào)現(xiàn)在已不存在。Every morning he will have a walk along this river.Whenever he was in trouble, he would ask me for help.Our company used to do business with theirs.語法專項(xiàng)提升四四.may 與與might(1)（表示請求（表示請求/準(zhǔn)許）可以準(zhǔn)許）可以You may not take photos in the museum .May I use your car? No, Im afraid you cant.注：

9、注：could/might用來表示請求、許可時(shí)，語氣比用來表示請求、許可時(shí)，語氣比can/may委婉，但在答語中不能用委婉，但在答語中不能用could/might.Could I use your bike? Yes, you can.Might I speak to you for a moment? Yes, you may.e g.語法專項(xiàng)提升 “may/might as well do sth” 意為意為“最好最好，倒不如，倒不如”(2)表示祝愿表示祝愿May you succeed!May God be with you!(3)句型句型: You may as well do it

10、at once. We may as well stay where we are.五五Must(1)（表示義務(wù)（表示義務(wù)/必要性）必須必要性）必須 You must do as you are told. must 作作“必須必須”講時(shí)，其否定式是講時(shí)，其否定式是“neednt”，表示，表示“不不必必”。 eg. Must I work out the problem tonight? No，you neednt. 注注: mustnt 表示表示“禁止，不準(zhǔn)禁止，不準(zhǔn)” You mustnt play with the knife; you may hurt yourself.(2) (表示

11、推測表示推測) 一定，準(zhǔn)是一定，準(zhǔn)是 There must be something wrong.(3)（表示固執(zhí)（表示固執(zhí),不滿）偏要不滿）偏要 If you must smoke, please go out. Why must you be talking so loudly while others are studying?1.(2010江蘇卷江蘇卷)I havent got the reference book yet，but Ill have a test on the subject next month.Dont worry. You _have it by Friday.A

12、couldBshallCmust DmayB2(2011濰坊質(zhì)量監(jiān)測濰坊質(zhì)量監(jiān)測)When we worked in the same firm several years ago，we _often go to the cinema together.Awould BwillCshall DcouldA3 ( 2 0 1 0 福 建 畢 業(yè) 班 檢 查福 建 畢 業(yè) 班 檢 查 ) F o r environmental reasons，we _as well take these waste products and have them recycled.Ashould BwouldCmi

13、ght DcouldC4(2010南通二模南通二模)Will it take me long to get to the Sunshine Hotel?No，it _take you long. Its not the rush hour now.Ashouldnt BshantCmustnt DneedntA二、幾組情態(tài)動(dòng)詞的區(qū)別二、幾組情態(tài)動(dòng)詞的區(qū)別1can 和和 be able tocan 與與 be able to 都可以表示能力都可以表示能力，但兩者在用法上有但兩者在用法上有點(diǎn)差異：點(diǎn)差異：can (could) 表示主觀能力表示主觀能力，不表示意愿或做不表示意愿或做事成功與否事成功

14、與否；be able to 表示主觀意愿表示主觀意愿，強(qiáng)調(diào)要克服困強(qiáng)調(diào)要克服困難去做某事并成功難去做某事并成功。它的將來時(shí)用它的將來時(shí)用will be able to。例例如：如：My grandma is over seventy，but she can still read without glasses.He is able to give up his bad habits.2must 和和 have tomust 和和 have to 都可以表示都可以表示“必須必須”，但有幾點(diǎn)區(qū)別：但有幾點(diǎn)區(qū)別：(1)must 強(qiáng)調(diào)強(qiáng)調(diào)“內(nèi)在的職責(zé)內(nèi)在的職責(zé)”、“義務(wù)義務(wù)”，而而 have to 強(qiáng)

15、調(diào)強(qiáng)調(diào)“外界壓力外界壓力”、“不得已而為之不得已而為之”。(2)have to 可用于多種時(shí)態(tài)可用于多種時(shí)態(tài)，而而 must 一般用于現(xiàn)在時(shí)一般用于現(xiàn)在時(shí)，其過去時(shí)與將來時(shí)分別由其過去時(shí)與將來時(shí)分別由 had to 與與 shall/will have to 代替代替。例如：例如：1)You must come to the classroom before eight. 2)It is raining hard outside，but I have to leave now.(3)在回答在回答 must 引起的問題時(shí)引起的問題時(shí)，如果是否定的答復(fù)如果是否定的答復(fù)，不能用不能用 mustnt，

16、而要用而要用 neednt 或或 dont have to.例如：例如：“Must we do it now？”“”“No，you neednt.” (4)must的反義疑問句用法：當(dāng)句子含有時(shí)間狀語的的反義疑問句用法：當(dāng)句子含有時(shí)間狀語的時(shí)候，根據(jù)時(shí)間狀語來定助動(dòng)詞的時(shí)態(tài)，如時(shí)候，根據(jù)時(shí)間狀語來定助動(dòng)詞的時(shí)態(tài)，如:He must have been to school last night, didnt he?當(dāng)句子不含時(shí)間狀語時(shí)，根據(jù)當(dāng)句子不含時(shí)間狀語時(shí)，根據(jù)must后面的動(dòng)詞來定，后面的動(dòng)詞來定，如：如：He must have been to school, hasnt he?3use

17、d todo，be used todoing 和和 be used todo(1)used todo意為意為“過去常常做某事過去常常做某事”，“過去一直過去一直做某事做某事”；be used tov. ing/n.意為意為“習(xí)慣于習(xí)慣于”；be used todo 意為意為“被用來做某事被用來做某事”。(2)used to 只表示過去只表示過去，而而 be used tov. ing / n.可表可表示現(xiàn)在示現(xiàn)在、過去或?qū)磉^去或?qū)?。例如：例如?)He used to smoke. Now he doesnt.2)Hes quite used to hard work/working ha

18、rd.3)The knife is used to cut bread.4cant 與與 mustntcant 表示表示“不能不能”，是指無能力；是指無能力；mustnt 表示表示“不能不能”，指的是指的是“禁止禁止，不允許不允許”。在口語里在口語里，cant 也可表示也可表示“禁止禁止，不允許不允許”，但語氣不如但語氣不如 mustnt 強(qiáng)強(qiáng)。例如：例如：He is so young that he cant go to school.Theres a meeting inside. You mustnt make any noise.5can 和和 may (1)can，could，may

19、，might 都可以表示可能性都可以表示可能性。can，could 表示潛在的可能性或理論上或邏輯判斷上存在的表示潛在的可能性或理論上或邏輯判斷上存在的可能性可能性;而而 may，might，則表示事實(shí)上的可能性則表示事實(shí)上的可能性。此此外外，can，could 還有還有“有能力有能力”的意思的意思，而而may與與 might 不具有此意不具有此意。例如：例如：According to the weather forecast，it may rain tomorrow.Any man with a little sense can see that he is wrong.(2)May I/w

20、e.？這一類疑問句的肯定回答為？這一類疑問句的肯定回答為 Yes，please.或或 Certainly；否定回答為；否定回答為 Please dont.或或 No，you mustnt.例如：例如：“May we leave now？”“”“No，you mustnt. You havent finished your homework yet.”6.shall用于第一、三人稱時(shí)，向某人詢問建議或提出用于第一、三人稱時(shí)，向某人詢問建議或提出意見，常用于疑問句中；用于第二、三人稱時(shí)，表達(dá)意見，常用于疑問句中；用于第二、三人稱時(shí)，表達(dá)允諾、威脅、警告、命令，或用于法律條文中。允諾、威脅、警告、命

21、令，或用于法律條文中。1must 表示推測時(shí)只能用于肯定句中，意為表示推測時(shí)只能用于肯定句中，意為“一定，必定一定，必定”，表示十分肯定的，表示十分肯定的(在疑問句中在疑問句中或或 否定句中要用否定句中要用can)。 (2009重慶)Hi，Tom. Any idea where Jane is? She must be in the classroom. I saw her there just now.Theres no light on-they cant be at home .2can 用于肯定句中有時(shí)可以用來表示推測，用于肯定句中有時(shí)可以用來表示推測，意為意為“有時(shí)會有時(shí)會”；用于疑

22、問句中可以表示推測，；用于疑問句中可以表示推測，意為意為“可能可能”，有時(shí)表示一種驚訝的語氣；用于，有時(shí)表示一種驚訝的語氣；用于否定句中也可以表示推測，否定句中也可以表示推測，cant 意為意為“不可能不可能”，語氣很強(qiáng)烈。語氣很強(qiáng)烈。e g. Mr. Bush is on time for everything. How can it be that he was late for the meeting?布什先生做什么事情都很準(zhǔn)時(shí)，他怎么可能遲到會議布什先生做什么事情都很準(zhǔn)時(shí)，他怎么可能遲到會議呢？呢？ (2008福建卷福建卷)It is usually warm in my hometo

23、wn in March，but it can be rather cold sometimes.3May/might用于肯定句中可以用來表示用于肯定句中可以用來表示推測，意為推測，意為“可能可能”；用于否定句中也可以表；用于否定句中也可以表示推測，示推測，may not 意為意為“可能不可能不”，表示一種不，表示一種不太確定的語氣。太確定的語氣。(2009遼寧卷遼寧卷)The traffic is heavy these days. I might arrive a bit late，so could you save me a place?最近這些天交通擁擠。我有可能遲到一會兒，因最近這些天

24、交通擁擠。我有可能遲到一會兒，因此請你給我留個(gè)位子好嗎？此請你給我留個(gè)位子好嗎？(2008全國卷全國卷)Liza may well not want to go on the tripshe hates traveling.莉莎可能不想去旅行，她厭惡旅行。莉莎可能不想去旅行，她厭惡旅行。4should 用來表示推測時(shí)意為用來表示推測時(shí)意為“應(yīng)該應(yīng)該”，即含有即含有“按道理來說應(yīng)當(dāng)如此按道理來說應(yīng)當(dāng)如此”的意思。的意思。(2010淄博檢測淄博檢測)The public transport in Beijing is very convenient，so there shouldnt be any

25、 difficulty in traveling around the city.現(xiàn)在北京的公共交通非常便利，所以在市區(qū)現(xiàn)在北京的公共交通非常便利，所以在市區(qū)觀光不應(yīng)該有什么困難。觀光不應(yīng)該有什么困難。語法專項(xiàng)提升5情態(tài)動(dòng)詞動(dòng)詞進(jìn)行式情態(tài)動(dòng)詞動(dòng)詞進(jìn)行式情態(tài)動(dòng)詞行為動(dòng)詞進(jìn)行式情態(tài)動(dòng)詞行為動(dòng)詞進(jìn)行式(即情態(tài)動(dòng)詞即情態(tài)動(dòng)詞bedoing)，表示推測或評論某動(dòng)作現(xiàn)在是否正表示推測或評論某動(dòng)作現(xiàn)在是否正在進(jìn)行在進(jìn)行。例如：例如：(1)He must be playing basketball in the room.(2)She may be staying at home.1.(2010浙江卷浙江卷)

26、“You _have a wrong number，” she said，“Theres no one of that name here.”Aneed BcanCmust DwouldC2(2010煙臺二模煙臺二模)I think Ill give Bob a ring.You _. You havent been in touch with him for ages.Awill BmayChave to DshouldD3(2010濟(jì)寧一模濟(jì)寧一模)When shall we hold the meeting?It _be better to put it off until next w

27、eek.Amust BcouldCcan DwillB1can/could have done 表示本能夠做表示本能夠做，疑問，疑問或否定形式表示對過去發(fā)生的行為表示懷疑或不肯定，或否定形式表示對過去發(fā)生的行為表示懷疑或不肯定，其中其中cant have done 多用于語氣強(qiáng)烈的否定，意為多用于語氣強(qiáng)烈的否定，意為“不可能做過不可能做過”。The accident could have been avoided.這場事故本來是可以避免的。這場事故本來是可以避免的。(2008天津卷天津卷)She cant have left school，for her bike is still here.

28、她的自行車現(xiàn)在還在這兒，她不可能已經(jīng)離開了學(xué)校。她的自行車現(xiàn)在還在這兒，她不可能已經(jīng)離開了學(xué)校。2may/might have done 表示對過去行為的推測，意為表示對過去行為的推測，意為“可能做過可能做過”。might 所表示的可能性比較弱，語氣較委婉。所表示的可能性比較弱，語氣較委婉。此外此外might have done 可表示可表示“本可能做而實(shí)際上未做本可能做而實(shí)際上未做”。I cant find my purse anywhere.You may have lost it while shopping.3must have done 表示對過去行為的推測，意為表示對過去行為的推測

29、，意為“一一定，想必定，想必”，語氣十分肯定。，語氣十分肯定。(2009上海卷上海卷)It must have been Tom that parked the car here，as he is the only one with a car.一定是湯姆把車停在這里的，因?yàn)橹挥兴熊?。一定是湯姆把車停在這里的，因?yàn)橹挥兴熊嚒?should/ought to have done 用于肯定句時(shí)，表示本該用于肯定句時(shí)，表示本該做某事，而實(shí)際上未做；用于否定句時(shí)，則表示不該做的事做某事，而實(shí)際上未做；用于否定句時(shí)，則表示不該做的事反而做了。反而做了。Im not feeling well in t

30、he stomach. I shouldnt have eaten so much fried chicken just now.我現(xiàn)在覺得肚子疼，我剛才不應(yīng)該吃那么多的炸雞。我現(xiàn)在覺得肚子疼，我剛才不應(yīng)該吃那么多的炸雞。You oughtnt to have been late for yesterdays class meeting，as it was so important.昨天的班會你本不應(yīng)該遲到，因?yàn)樗苤匾?。昨天的班會你本不?yīng)該遲到，因?yàn)樗苤匾?5.neednt have done 表示本不需要表示本不需要I actually neednt have bought so mu

31、ch wineonly three people came.1.(2010濰坊教學(xué)質(zhì)量抽樣監(jiān)測濰坊教學(xué)質(zhì)量抽樣監(jiān)測)Her English composition is much too perfect. She _it herself，I bet.Amight have written Bcant have writtenCcant write Dmust have writtenB2(20103月浙江金華十校聯(lián)考月浙江金華十校聯(lián)考)Why didnt you come to Mikes birthday party yesterday.Well，I_，but I had something

32、 important to do the moment.Ashould BmustCshould have Dmust haveC3(2010安徽卷安徽卷)Jack described his father，who _a brave boy many years ago，as a strong-willed man.Awould be Bwould have beenCmust be Dmust have beenD4(2010山東卷山東卷)I_ have watched that movieitll give me horrible dreams.Ashouldnt BneedntCcoul

33、dnt DmustntA情況情況從句從句的動(dòng)詞的動(dòng)詞主句主句的動(dòng)詞的動(dòng)詞例句例句與現(xiàn)與現(xiàn)在事在事實(shí)相實(shí)相反反動(dòng)詞的過去式動(dòng)詞的過去式(be動(dòng)詞一律用動(dòng)詞一律用were)would/could/should/might 動(dòng)詞原形動(dòng)詞原形If I had time，I would attend your party.如果我有時(shí)間，我就去參加你的宴會了。如果我有時(shí)間，我就去參加你的宴會了。If I saw him now，I would be very happy.如果我現(xiàn)在見到他，我會很高興的。如果我現(xiàn)在見到他，我會很高興的。與過與過去事去事實(shí)相實(shí)相反反had過去過去分詞分詞would/could

34、/should/mighthave過去過去分詞分詞You didnt let me drive .If we had driven in turn，you wouldnt have got so tired.你當(dāng)時(shí)不讓我開車。如果我們輪流開，你你當(dāng)時(shí)不讓我開車。如果我們輪流開，你就不會覺得那么累了。就不會覺得那么累了。與將與將來事來事實(shí)相實(shí)相反反動(dòng)詞的過去式；動(dòng)詞的過去式；should動(dòng)詞原動(dòng)詞原形；形；were to動(dòng)詞原形動(dòng)詞原形would/could/might/should動(dòng)詞原形動(dòng)詞原形If it snowed/were to snow/should snow tomorrow，we

35、 would take photos.如果明天下雪，我們就照相。如果明天下雪，我們就照相。注意：注意：(1)(1)若條件句中有若條件句中有werewere，hadhad，shouldshould，可把，可把if if 省略，省略，而把而把werewere，hadhad，should should 放在主語前，形成倒裝結(jié)構(gòu)放在主語前，形成倒裝結(jié)構(gòu). .Had you taken my adviceHad you taken my advice，you wouldnt have failed in you wouldnt have failed in the examination.the exa

36、mination.(2)(2)有時(shí)主句和虛擬條件從句的動(dòng)作發(fā)生的時(shí)間不一致，此時(shí)，有時(shí)主句和虛擬條件從句的動(dòng)作發(fā)生的時(shí)間不一致，此時(shí)，主句和從句的謂語動(dòng)詞要根據(jù)各自所指的不同時(shí)間選擇適當(dāng)?shù)膭?dòng)主句和從句的謂語動(dòng)詞要根據(jù)各自所指的不同時(shí)間選擇適當(dāng)?shù)膭?dòng)詞形式。詞形式。If you had worked hardIf you had worked hard，you would be very tired now.you would be very tired now.如果你真的努力工作了，你現(xiàn)在就會感到很累的。如果你真的努力工作了，你現(xiàn)在就會感到很累的。( (從句指過從句指過去，主句指現(xiàn)在去，主句指現(xiàn)

37、在) )(3)有時(shí)虛擬條件并不通過條件從句表達(dá)出來，而是通過詞、短有時(shí)虛擬條件并不通過條件從句表達(dá)出來，而是通過詞、短語或上下文暗示，此時(shí)句子的時(shí)態(tài)要依具體情況而定。語或上下文暗示，此時(shí)句子的時(shí)態(tài)要依具體情況而定。Without electricity(If there were no electricity)，life would be quite different today.如果沒有電，今天的生活就會完全不同。如果沒有電，今天的生活就會完全不同。But for your help，it would have caused a serious loss.要不是你的幫助，那將會導(dǎo)致巨大的損

38、失。要不是你的幫助，那將會導(dǎo)致巨大的損失。I was busy that day. Otherwise I would have gone there with them. (If I hadnt been busy that day，I would have gone there with them.)我那天很忙，否則，我就和他們一起去那兒了。我那天很忙，否則，我就和他們一起去那兒了。1.(2010湖南卷湖南卷)If he _my advice，he wouldnt have lost his job.AfollowedBshould followChad followed Dwould f

39、ollowC2(2011廈門市質(zhì)量檢查廈門市質(zhì)量檢查)Thank you for reminding me of the time，or I _late yesterday.Dont mention it.Ashould be Bwould beCwill have been Dwould have beenD3(2011山東濰坊質(zhì)檢山東濰坊質(zhì)檢)_more careful，the mistake would not have been made.AIf he is BHad he beenCShould he be DIf he has beenB(1)在名詞性從句中，常用來表示命令、建議、

40、要求、愿望在名詞性從句中，常用來表示命令、建議、要求、愿望等的詞后賓語從句和同位語從句中用虛擬語氣，形式為：等的詞后賓語從句和同位語從句中用虛擬語氣，形式為：(should)動(dòng)詞原形。常這樣用的動(dòng)詞有：動(dòng)詞原形。常這樣用的動(dòng)詞有：advise 勸告，勸告，demand 要求，要求，desire 渴望，渴望，command 命令，命令，insist 堅(jiān)持，堅(jiān)持，prefer 寧愿，寧愿，urge 主主張，張，order 命令，命令，recommend 推薦，推薦，request 要求，要求，require 要求，要求，suggest 建議，以及這些詞的名詞形式。建議，以及這些詞的名詞形式。Jan

41、es pale face suggested that she was ill，and her parents suggested that she (should) have a medical examination.簡蒼白的臉色表明她生病了，她父母建議她做一下醫(yī)學(xué)檢查。簡蒼白的臉色表明她生病了，她父母建議她做一下醫(yī)學(xué)檢查。(2)wish后面所跟賓語從句中的虛擬語氣。后面所跟賓語從句中的虛擬語氣。表示對現(xiàn)在情況的虛擬：表示對現(xiàn)在情況的虛擬：wish主語動(dòng)詞過去式或主語動(dòng)詞過去式或were表示對過去情況的虛擬：表示對過去情況的虛擬：wish主語主語had過去分詞過去分詞表示對將來情況的虛擬：

42、表示對將來情況的虛擬：wish主語主語would動(dòng)詞原形動(dòng)詞原形I wish she were here.她在這兒就好了。她在這兒就好了。I wish you would go with us tomorrow.但愿你明天跟我們一塊去。但愿你明天跟我們一塊去。I wish she had taken my advice.那時(shí)她要是聽我的話就好了。那時(shí)她要是聽我的話就好了。1.(2010福建卷福建卷)Teachers recommend parents _their children under 12 to ride bicycles to school for safety.Anot allo

43、w Bdo not allowCmustnt allow D. couldnt allowA2(2011山東濰坊質(zhì)量抽樣山東濰坊質(zhì)量抽樣)The order came that the medical supplies _to Beijing for the H1N1 flu soon.Awould be sent Bshould sendCbe sent Dmust be sentC(1)would rather 句型中的虛擬語氣表示愿望，意為句型中的虛擬語氣表示愿望，意為“寧愿，寧愿，但愿但愿”。Id rather we didnt go to see a film this evenin

44、g.我倒希望我們今晚不去看電影。我倒希望我們今晚不去看電影。(2)It is (high/ about) time (that).句型中的虛擬語氣句型中的虛擬語氣在句型在句型“It is (high/about) time.”后面也可跟虛擬語氣，后面也可跟虛擬語氣，從句中常用過去式。有時(shí)也用從句中常用過去式。有時(shí)也用“should動(dòng)詞原形動(dòng)詞原形”，意為，意為“該是該是的時(shí)候了的時(shí)候了”。It is time (that) we went home.我們該回家了。我們該回家了。(3)if only 引導(dǎo)的感嘆句中的虛擬語氣引導(dǎo)的感嘆句中的虛擬語氣在在“if only”引導(dǎo)的感嘆句中，要求用虛擬語氣，引導(dǎo)的感嘆句中，要求用虛擬語氣，表示愿望。用過去時(shí)或表示愿望。用過去時(shí)或“would/could動(dòng)詞原形動(dòng)詞原形”表示與現(xiàn)在或