【精選】2020年中考英語語法復(fù)習(xí)6《情態(tài)動(dòng)詞》

1、2020年中考英語語法復(fù)習(xí)方案6情態(tài)動(dòng)詞【趨勢解讀】情態(tài)動(dòng)詞是各地中考的必考點(diǎn)，主要考查情態(tài)動(dòng)詞的基本用法，考題貼近生活實(shí)際， 體現(xiàn)語言學(xué)習(xí)的實(shí)用性。要求考生熟知情態(tài)動(dòng)詞的基本特點(diǎn)，掌握常見倩態(tài)動(dòng)詞的各種用法?？忌痤}時(shí)需認(rèn)真體會(huì)語境，揣摩說話者的語氣強(qiáng)弱和態(tài)度。難度適中，一般分值在12分。預(yù)計(jì)中考關(guān)于本專題知識(shí)命題趨勢如下：(1)各地中考情態(tài)動(dòng)詞考查的熱點(diǎn)為表推測、許可及義務(wù)含義的情態(tài)動(dòng)詞，尤其是對(duì)must三種用法的考查是重中之重。(2)自主招生考試的重點(diǎn)將關(guān)注情態(tài)動(dòng)詞表示推測的用法及情態(tài)動(dòng)詞與現(xiàn)在完成時(shí)連 用。A值為12分?！舅季S引導(dǎo)】精彩筆記1表示能力的情態(tài)動(dòng)詞去示意義例調(diào)用法否定式例旬

2、表夏荏眼牌來能林夏串If you savt new b you can will be Able to buy a ctr socr.虻果你現(xiàn)在存錢的誥，不久就愛買一輯汽車了“I can climh the Tnountam.I am able fo climb the rwunitiirL 我能登上那座山*could親示過去能做某事He cdullI speak Eniish theof 3Kd lit 帆七Fable io speak English at thr 電算e of one.注意:表示具有某種能力的還有半情態(tài)動(dòng)詞be able to,但是和can有區(qū)別，can只有現(xiàn)在式和過去式

3、。be able to可以有更多的時(shí)態(tài)。核心題根 1 (1) I'm going to Europe on vacation together with John if I find the money.A. canB. mightC. wouldD. need思路點(diǎn)撥：考查情態(tài)動(dòng)詞表示能力。句意:如果我現(xiàn)在能有足夠的錢，我將和 John 一起去歐洲度假。can “能，會(huì)”，表示體力、智力、技能方面的能力 ；might "可能，可以”，表示可能 性推測；would "愿意"；need "需要”，表示必要。(2) No one be compare

4、d with Yao Ming in playing basketball. Oh,you are really his big fan.A. canB. needC. mustD. might思路點(diǎn)撥：句意：一在打籃球方面沒有人能和姚明相比。一你真是他忠實(shí)的粉絲。此處應(yīng)填表示能力的情態(tài)動(dòng)詞。can “能，會(huì)”，表示能力；need “需要”；must “必須”，同類變式1 (1) IA. can'tC. needn'tfollow you.表示義務(wù)；might "可以，可能”，表示請(qǐng)求許可或可能性的推測。Would you please repeat it?B. mu

5、stn'tD. shouldn'tdo that.C. should(2)Hate cannot drive out hate; only loveA. canB. must(3) The police still haven't found the lost child, but they are doing all theyB. mayD. shouldA. canC. must知識(shí)歸納(1) was/were able to do sth相當(dāng)于succeeded in doing sth,“表示過去有能力做并且成功地 做了”。(2)could have done表

6、示過去有能力做但未做。例如：The fire spread through the supermarket quickly, but everyone was able to get out.盡管大火迅速地蔓延到整個(gè)超市，但是每個(gè)人都逃出來了。I could have worked out the problem, but I was too nervous. 我本來可以解出這道題，但 是我太緊張了。精彩筆記2 表示義務(wù)責(zé)任：have to/must和Should/ought to1.must/have to 和 needn't 的用法(1)現(xiàn)在或?qū)肀仨氉龅氖?：must/have

7、to do sth如:Ori must/has to wear a School uniform. Ori 必須穿校服。(2)現(xiàn)在或?qū)聿槐刈龅氖?：don't have to do sth; needn't do sth=don't need to do sth2.should 和 ought to 的用法(1)should和ought to表示義務(wù)、責(zé)任，意為"應(yīng)該”。表示責(zé)任義務(wù)時(shí)語氣由強(qiáng)到弱排 列應(yīng)該是 must>ought to>should ,即 ought to 的語氣強(qiáng)于 should,弱于 must。(2)與不定式完成體連用時(shí)表示

8、對(duì)“本應(yīng)該做而沒有做某事”的責(zé)備。例如：You should(=ought to)90 to class right now.你應(yīng)該立即去上課。Should I open the window? 我應(yīng)該打開窗戶嗎 ？核心題根 2-1 All passengers go through safety check before they take a plane.A. canB. mayC. mustD. ought思路點(diǎn)撥：can “能，會(huì)”，表示能力；may “可以”，表示請(qǐng)求允許；must “必須”，表示必 須做;ought “應(yīng)該”，表示義務(wù)。根據(jù)句意“乘飛機(jī)之前所有的乘客必須通過安檢”，

9、可推斷此空應(yīng)填表示“必要性”的情態(tài)動(dòng)詞。(2)I worry about my weekend I always have my plans ready before it comes.A. can'tB. needn'tC. shouldn'tD. daren't思路點(diǎn)撥：can't"不能，不會(huì)做"；needn't"不必，沒有必要做"；shouldn't"不應(yīng)daren't “不敢”。根據(jù)句意“我不必?fù)?dān)心周末一到周末之前我總會(huì)做好計(jì)劃的"，可推斷worry之前應(yīng)填“沒有

10、必要”。同類變式2-1(1)改寫以下句子，用 must或have to來代替斜體印出的部分。 It will be necessary ,for you to see a doctor. Is it necessary for you to make so much noise?DShe said it would be necessary for us to stay here. It is necessary for me to have some help. it was necessary for him to go out last night.(2)If you smoke, pl

11、ease go outside.A. canB. mayC. mustD. might(3) It's quite warm here; we turn the heating(暖氣)on yet.A. couldn'tB. mustn'tC. needn'tD. wouldn't知識(shí)歸納(1) must/have to必須，一定要。have to有人稱、數(shù)和時(shí)態(tài)的變化；must沒有變化。如:He had to see the dentist yesterday 他昨天不得不去看了牙醫(yī)。Ori will have to stay at home tomo

12、rrow.奧利明天將不得不待在家里。(2)must強(qiáng)調(diào)說話人的主觀看法，have to強(qiáng)調(diào)客觀需要。(3)不要混淆了 mustn't與needn't和don't have to: mustn't是強(qiáng)調(diào)"禁止做某事"，"沒有 必要筱 用 needn't或don't have to表不。B. shouldn'tC. need核心題根 2-2 (1) As middle school students, we be afraid of difficulties if we want to make our drea

13、ms come true.A. must思路點(diǎn)撥：考查表示義務(wù)的情態(tài)動(dòng)詞的用法。must"必須"，shouldn't "不應(yīng)該"，need "需要”。根據(jù)句意“作為中學(xué)生，如果我們想要夢想成真，我們就不應(yīng)該害怕困難”可知此空 要填“不應(yīng)該”才符合題意。(2) My cat's really fat.一 You have given her so much food.A. wouldn'tB. couldn'tC. shouldn'tD. mustn't思路點(diǎn)撥：句意:一我的貓真的很胖。一你(本)不

14、應(yīng)該喂它那么多吃的東西。shouldn't+have done表示"本不應(yīng)該做的事情卻做了"。根據(jù)對(duì)話的情景可知，第二句的內(nèi)容是第一句貓?zhí)值脑蛞晃沽颂嗟氖澄?。換句話說就是：你不應(yīng)該喂它那么多食物。同類變式 2-2 (1) What do you think we can do for our aged parents?You do anything except to be with them and be yourself.A. don't have toB. oughtn't toC. mustn'tD. can't(2)

15、How's your tour around the North Lakes Is it beautiful?It be, but it is now heavily polluted.A. willB. wouldC. shouldD. must(3)Turn off the TV , Jack. your homework now? 一 Mum, just ten more minutes, please.A. Should you be doingB. Shouldn't you be doingC. Couldn't you be doingD. Will yo

16、u be doing知識(shí)歸納(1)在疑問句中，通常用should代替oughtto。(2)ought to "應(yīng)該"，否定形式為ought not to或oughtn't to,其一般疑問句形式是將ought置于主語前。如：I ought to write to him today.我今天應(yīng)當(dāng)給他寫信。Humans oughtn't to pollute nature.人類不應(yīng)污染大自然。Ought we to help one another?我們應(yīng)該互相幫助嗎 ？(3) need “有必要"，need作情態(tài)動(dòng)詞時(shí)，只用于否定句或疑問句中。在肯定

17、句中用 must,have to, ought to 或 should o 如：You needn't be told twice about one single thing.同一件事對(duì)你不必說兩遍。 Need Ori come here?奧利有必要來嗎？Yes, he must.是的。/No,he needn't.不，沒必要。(4) need還可以作實(shí)義動(dòng)詞，意為“需要”，有人稱和數(shù)的變化，后接名詞或帶to的不定式。如： Do I need to leave my telephone number and address?需要我把電話和地址留下嗎？Yes, you need

18、 to.是的。/No, you don't need to.不必。精彩筆記3 表示許可:may/might和can/could(1) can /could表示允許，意為"可以"，could語氣更委婉。如： Can I borrow your book?我可以借你的書嗎 ？ 一Yes, you can.可以。Could(不是can的過去式)I use your cell phone for a while?我可以用一會(huì)兒你的手機(jī)1Yes, of course you can(表示允許別人做某事，用 can,而不用could ).好的，當(dāng)然可以。(2) may /mig

19、ht表示允許，意為"可以"，might語氣更委婉。如：You may use my ruler.你可以用我的尺子。 May I come in?我可以進(jìn)來嗎，Yes, you may(表示給予許可時(shí)，不用 might ).是的，你可以進(jìn)來。May/Might I have a few words with your manager, please ,我可以和你的經(jīng)理談一談嗎，He asked if he might use the phone.他問是否可以用一下電話。核心題根 3 (1) I forgot to bring my dictionary. Could I us

20、e yours?Yes, you .A. canB. mustC. couldD. should思路點(diǎn)撥：考查表示允許的情態(tài)動(dòng)詞的用法。Could/Can I？是一個(gè)表示請(qǐng)求對(duì)方許可的句型，意為“我可以嗎？”，肯定回答用“Yes, you can. ”否定回答通常用“Sorry, you can't. 等。(2) Dick, I use your e-dictionary?Yes, sure.A. will; WouldC. can; Couldyou give it to David after you use it?B. may; MightD. shall; Should思路點(diǎn)撥

21、：will/would用作情態(tài)動(dòng)詞表示意愿，決; may/might "可以"于表示允許， 不用于表示請(qǐng)求方做某事。 should “應(yīng)該”，表示義務(wù)；shall作情態(tài)動(dòng)詞，一般用于第一人 稱，表示征求對(duì)方的意見。Can I？ “我可？”用于請(qǐng)求允許。Could you . ? “你能？”用于有禮貌地 請(qǐng)求對(duì)做某事，相當(dāng)于" Will you please . ？"和"Would you like to .？”。同類變式3 改寫以下句子，用 can或may來代替斜體印出的部分。Will you let one use your telephon

22、e , please？(2)Perhaps he will telephone tomorrow.(3)Perhaps the play has begun already.(4)Will you let me leave the table , please？知識(shí)歸薊(1)對(duì)于may引導(dǎo)的疑問句的回答有以下幾種：May I come in？我可以進(jìn)來嗎？Yes, please.可以。/Yes, you may.可以。/No, you mustn't.不，千萬另U。 /No, you had better not.不，最女f別。/No, you can't.不，你不能。(2)m

23、ay置于句首表示祝愿。May you live long!祝你長壽!May you all succeed in whatever you do!祝你萬事成功 !精彩筆記4表示請(qǐng)求、建議、命令、禁止、意志 (意愿、決心)(1)must(必須)，mustn't(禁止)表示命令、禁止語氣較強(qiáng)。The children must be back by 4 o'clock.孩子們必須在四點(diǎn)之前回來。You mustn't play football in the street. It's dangerous.你們一定不要在街上踢足球，這很危I(2)Can(Could)

24、/Will(Would) you .？表示提出請(qǐng)求、邀請(qǐng)、建議，一般用于疑問句，常用 于第二人稱。Would you join us in the game ,你要不要和我們一起做游戲，Will you phone me later？你過一會(huì)兒再給我打電話好嗎，(3) shall 一般用于第一人稱，表示征求對(duì)方的意見或請(qǐng)求對(duì)方。What time shall I come？我應(yīng)該什么時(shí)候來，Shall I change into the evening dress for your party ,我換上晚禮服參加你的聚會(huì)好嗎，(4) will /would表示意愿、決心、愿望等。 Can so

25、meone help me,有人能幫一下忙嗎，一 I will ,我來幫你。We won't stay at your house for a long time.我們不會(huì)在您這里待太長時(shí)間。He said he would fight for the world championship.他說他要爭奪世界冠軍。Would you like some cake ,吃點(diǎn)蛋糕嗎？核心題根 4 (1)Shall we raise some money for the children of Yushu, Qinghai Province？A. I seeB. It's a pleas

26、ureC. I don't believe itD. That's a good idea思路點(diǎn)撥：shall用作情態(tài)動(dòng)詞，語氣比較委婉，常和第一人稱I或we搭配，用于疑問句表示征詢對(duì)方意見。句意：一我們?yōu)榍嗪Ｊ∮駱涞暮⒆觽兙栊╁X好嗎？那是個(gè)好主意。A：我知道了 ；B：不客氣；C：我不信；D:那是個(gè)好主意。(5) You park here! It's an emergeney exit.A. wouldn'tB. needn'tC. couldn' tD. mustn't思路點(diǎn)撥：句意:不允許你在這兒停放汽車！這是一個(gè)緊急出口。根據(jù)語

27、境可知汽車司機(jī)停車位置不對(duì)，緊急出口處禁止停車、阻塞，四個(gè)選項(xiàng)中只有 mustn't意為"不應(yīng)該，不許可，禁止“。同類變式4 (1)用mustn't或needn't填空。You make a noise. The children are asleep.You drive so quickly; we have plenty of time.You come with us if you don't want to.You smoke in a theatre. It is forbidden.(2)(上海春招)According to the loc

28、al regulations, anyone who intends to get a driver's license take an eye test.A. canB. mustC. wouldD. may(6) Sharon,remember to lock the door before leaving the house. 一 .A. OK, I willB. Yes, pleaseC. It's hard to sayD. It doesn't matter知識(shí)歸納(1)awould like to+ 動(dòng)詞原形"意為"想要做"。

29、如：I would like to buy a new computer.我想買一臺(tái)新電腦。I would like to go out for a walk.我想出去散步?！皐ould you mind+ 動(dòng)名詞？" 意為"你介意嗎？" 如：Would you mind opening thewindow?你介意開一下窗戶嗎？Of course not. 當(dāng)然不介意。(2)dare “敢，有膽量”，多用于否定、疑問嘆條件句中。如 ：Ori dare not travel alone.奧利不敢獨(dú)自去旅行。How dare you say that?你竟敢那樣說？Y

30、ouwill be punished if you dare break the rules.如果你敢違反規(guī)定，就會(huì)受到處罰。精彩筆t己 5 used to 和 can't help doing 及 had better(1) used to表示過去常常，否定式為usedn't to或didn't use to。Ori used to take a walk every morning.奧利以前經(jīng)常每天早上去散步。Mary used to live in Beijing.瑪麗過去住在北京。He didn't use to be so careless 他過去沒這

31、么粗心。(2) had better(常略為'd better)意為“最好”，用于表示對(duì)別人的勸告、建議。You had better be quiet.(用于現(xiàn)在)你最好安靜些。You had better start tomorrow.(用于將來)你最好明天動(dòng)身。We had better be going out for a walk.(用于進(jìn)行時(shí))我們最好現(xiàn)在就散步。You had better not miss the late bus.(否定語)你最好不要錯(cuò)過末班車。Hadn't you better ask him first ,你不認(rèn)為該先問問他嗎？(3) ca

32、n't help doing表示“不得不，禁不住”。When I try to speak, I can't help making mistakes.我一開 口就禁不住犯錯(cuò)誤。核心題根 5 The Yellow River flood large areas, but now the waters of it are used to energy.A. was used to; producingB. used to; producingC. was used to; produceD. used to; produce思路點(diǎn)撥：句意:黃河過去常淹沒大片區(qū)域，但是現(xiàn)在黃河水被

33、用來產(chǎn)生能源。used to do表示“過去常常"，be used to do意為“被用來做”。同類變式 5 (1)A mobile phone of this type costs too much. You'd betterA. waitB. waitingC. waitedD. to wait(2) The Greens used to live in London and now they in Beijing.(1) used to liveB. are used to liveC. are used to livingD. are used for living易

34、錯(cuò)警示容易混淆的三個(gè)used及句型：used to do sth過去常常做某事(現(xiàn)在已不再這樣)be used to doing sth習(xí)慣于做某事(to是介詞)be used to do sth被用來做某事例如：Mr White used to live in China, so he is used to Chinese dishes.懷特先生過去曾住在 中國，所以習(xí)慣了中國菜。精彩筆記6對(duì)現(xiàn)在的情況的推測與判斷形式用鎏舉倒must十狀態(tài)動(dòng)目用在肯定句中，意為”一定、表示肯 定的假設(shè)和推測©f<v nui、i he af home now, 地z- A 定在家里口十 be

35、doing一定正在"mg he doing hi> Immiwnrknow.他現(xiàn)在肯定在做作業(yè)。canhr,動(dòng)詞原形月在百定句或疑問句中，表示一不可Can he hr 如【h-nme now1He can l be al hciruc nqwr+ be dniTig “不會(huì)正在”Can hr be Mill working?He can t he still workm ncrw.may+動(dòng)詞原影用在肯定句中表示.可能二用在否定句中表示,可能不二He may be rifihT, I may not be right.十 be doing“可能正在"She may b

36、e writing a letter 10 hr parents now*might+動(dòng)詞原形用在肯定句中表示U可能二但不如 may肯定口用在否定句中表示可健不”，也不如 may net語氣強(qiáng)口He mighi be in tht roonii but I'm nut sure.Vm afraid she might not agree with the ide&41bHe doing可能正在.They might be working now.should /ought to義動(dòng)詢?cè)沃挥迷诳隙ň渲斜硎?應(yīng)談,估計(jì)應(yīng) 遞,想必鬲，會(huì)、He should be (ought t

37、o be) at home now*核心題根 6 (1)What's the matter with Tom? He has been absent for two days.一 Oh! He be ill. Let's go and ask Ms Brown.A. canB. needC. mayD. would思路點(diǎn)撥：考查情態(tài)動(dòng)詞的用法。can “可以，能”，表示能力或允許；need “需要”，表示 義務(wù)；may "可以，可能”，表示允許或?qū)赡芮闆r的推測；would "愿意"，表示意志。句意-Tom怎么啦？他曠課兩天了。一哦！他可能生病了。

38、讓我們?nèi)枂朆rown女士吧。(2) - I have been to the moon twice.You be joking! It's impossible!A. canB. mayC. mustD. need思路點(diǎn)撥：考查情態(tài)動(dòng)詞表示推測?！癿ust+ be+ doing”表示“現(xiàn)在一定在做某事"。而 “may+be+doing”則表示“可能正在做某事”。根據(jù)上文“我到月球去過兩次”，可推斷下文為“你一定是在開玩笑，這不可能”。(3) Is that man Mr Smith?一 It be him. He has gone to New York on busine

39、ss.A. may notB. needn'tC. can'tD. mustn't思路點(diǎn)撥：考查情態(tài)動(dòng)詞表示推測。根據(jù)下文“ Mr Smith已經(jīng)去了 New York”,可推斷 出那個(gè)人不可能是他。同類變式 6 一You needn't take an umbrella. It isn't going to rain.Well, I don't know. It do.A. mightB. needC. wouldD. should(2) Hi, Tom. Any idea where Jane is ?一 She in the classro

40、om. I saw her there just now.A. shall beB.should havebeenC. must beD.might have been(3)I'm afraid Mr Harding see you now. He's busy.A. can'tB.mustn'tC. shouldn'tD.needn't知識(shí)歸納使用情態(tài)動(dòng)詞時(shí)需要注意的情況：(1)在一個(gè)句子中只用一個(gè)情態(tài)動(dòng)詞，不可同時(shí)用兩個(gè)。(2)情態(tài)動(dòng)詞的過去式有時(shí)只表示語氣婉轉(zhuǎn)，并不表示“過去” 。(3)情態(tài)動(dòng)詞表示推測與判斷時(shí)，語氣依下列順序而減弱：mus

41、tfcanfcould fmayf might(4)肯定句中must表示對(duì)一件事確有把握(因?yàn)閺倪壿嬌蟻碚f，它是必然的)，這時(shí)不能用have to代替 must。如：Mary must have some problems. She keeps crying.瑪麗肯定有點(diǎn)不舒服，她老是哭。(5) must表示有把握的推測時(shí)，在否定句或疑問句中， 要代之以can't/cannot和can。如:Ori cannot be a lazy boy.奧利一定不會(huì)是個(gè)懶惰的孩子。What do you think this letter can mean?你認(rèn)為這封信意味著什么 ？精彩筆記7“情態(tài)

42、動(dòng)詞+不定式的完成體”表示對(duì)過去發(fā)生的事情的推測和判斷(常在自主招生中或中考的閱讀理解文章中出現(xiàn))1. must have done表示對(duì)過去發(fā)生行為的推測，意思是“一定，準(zhǔn)是" ，只用于肯定句中。如：The streets are wet, it must have rained.街道是濕的, 準(zhǔn)是下雨了。2. could have done(1)表示過去(那時(shí))“本來可以，差點(diǎn)就要”做的事情。如 ：He could have arrived earlier.他本可以早一點(diǎn)到的。(2)用于疑問句表示驚奇和懷疑，意思為“不可能(已經(jīng))了，可能(已經(jīng))了嗎？”。如：Where coul

43、d she have gone,她可能到哪里去了呢，3. can't ( couldn't)have done表示對(duì)過去事情向真實(shí)性表示不相信；用couldn't+have done顯得語氣更婉轉(zhuǎn)。如：He can't have gone home because I saw him on the playground just now.他不可能回家了, 因 為我剛剛在操場上見過他。4. may ( might)have done表示另過去的不情可能性的推測。might比may表示的可能性更小，或與實(shí)際情況相反，常有批評(píng)的意思，意為“本應(yīng)該”“或許(已經(jīng))”“或

44、許還沒有”。如：Tom is playing in the garden. He may have finished his homework.湯姆正在花園里玩，他 可能已經(jīng)完成作業(yè)。You might have told him earlier. He is angry now.你本應(yīng)該早點(diǎn)告訴他的，現(xiàn)在他生氣5. should(ought to)have done表示對(duì)過去應(yīng)該做而沒有做的行為的責(zé)備。否定式表示對(duì)過去不該做而又做了的事表示責(zé)備，意思為“本不該的"，用ought to時(shí)，責(zé)備意味較強(qiáng)。如：You should(ought to) have been here ten

45、 minutes ago.你本該十分鐘之前來這兒。(實(shí)際上沒到)I feel very hot. I shouldn't ( oughtn't to ) have worn the overcoat.我覺得很熱，我不應(yīng)該穿這件大衣的。實(shí)際上穿上了)6. needn't have done常用于否定句中，表示做了不必要做的事情，意思為“本來不必的”。如：You needn't have waited for us.你本不必等我們的。(實(shí)際上等了)7. daren't have done常用于否定句中，表示做了原來不敢做的事。如 ：He didn't

46、 pass the exam. He daren't have gone home.他考試沒及格，本來他不敢回家的。(實(shí) 際上回家了 )核心題根 7 (1) Since nobody gave him any help, he have done the research on his own.A. canB. mustC. wouldD. need思路點(diǎn)撥：句意:既然沒有人給予他幫助，他肯定是自己完成這項(xiàng)研究工作的。本題考查 情態(tài)動(dòng)詞表示推理、 猜測的用法。would have done意為“大概，可能"，不符合句意。can have done意為“本可能”，表示發(fā)生概率不

47、大的情況，也不符合本題的語境要求。B項(xiàng)must havedone表示對(duì)過去發(fā)生行為的肯定推測，意為“一定，準(zhǔn)是" ，符合語境要求。(2)(天津自招)She have left school, for her bike is still here.A. can'tB. wouldn'tC. shouldn'tD. needn't思路點(diǎn)撥：考查情態(tài)動(dòng)詞對(duì)過去發(fā)生的事進(jìn)行推理判斷。其結(jié)構(gòu)為“情態(tài)動(dòng)詞+have+過去分詞”。根據(jù)下文“因?yàn)樗淖孕熊囘€在這兒”，可以推斷她不可能離開了學(xué)校。(3) We the difficulty together, but w

48、hy didn't you tell me?A. should faceB. might faceC. could have facedD. must have faced思路點(diǎn)撥：句意:我們本可以一起面對(duì)困難，你為什么不告訴我呢？情態(tài)動(dòng)詞+動(dòng)詞原形，可以表示對(duì)現(xiàn)在情況的推測判斷；情態(tài)動(dòng)詞十不定式的完成體，可以表示對(duì)過去事情的推測判斷。根據(jù)第二句中didn't可知，題中說的是過去發(fā)生的事情。因此排除A,B項(xiàng)。could havedone意為"本可以做"must have done意為"肯定做了"。根據(jù)語境提示"Why didn&

49、#39;tyou tell me?”和連接詞but可知，“我們”并沒有一起面對(duì)困難。所以排除D項(xiàng)。同類變式 7 (1) Mark have hurried. After driving at top speed , he arrived half an hour early. A. needn'tB. wouldn'tC. mustn'tD. couldn't13 years before she(2)The woman biologist stayed in Africa studying wild animals for returned. Oh, dear

50、! She a lot of difficulties! A. may go throughB. might go throughC. ought to have gone throughWhere I have put it?B. mustD. wouldD. must have gone through(3) My MP4 player isn't in my bag.A. canC. should方法技巧could 是 can的過去式， 而在于其語氣的委婉程度的:And someday, remember,(1)情態(tài)動(dòng)詞的時(shí)態(tài)形式并不是其時(shí)間區(qū)別的主要標(biāo)志。例如, 但兩個(gè)詞都可以

51、用于表示現(xiàn)在， 其主要區(qū)別并不在于時(shí)間意義, 不同。對(duì)于情態(tài)動(dòng)詞時(shí)間意義的解題，主要還是依靠上下文。例如you might be in the same situation.(請(qǐng)記住，沒準(zhǔn)兒哪天你也會(huì)面臨相同的處境。)此句的 might是過去式，但根據(jù) remember的時(shí)態(tài)形式可以推斷，其時(shí)間意義仍然是現(xiàn)在。(2)情態(tài)動(dòng)詞主要用來表示“可能”、“能力”、“許可”、“邏輯必然”、“義務(wù)”、“意志” 和“假設(shè)意義”等七種意義。但是一詞多義現(xiàn)象在情態(tài)動(dòng)詞中的普遍存在，使得情態(tài)動(dòng)詞的用法十分復(fù)雜。因此我們建議考生著重從閱讀理解的角度， 結(jié)合上下文來揣摩、判斷情態(tài)動(dòng) 詞所表達(dá)的意義。跟蹤練習(xí)1. He

52、y, Jack, you make the room such a mess. It's hard to do the cleaning.A. needn'tB. may notC. mustn'tD. won't2. David have gone far because his lap computer is over here, he must be nearby.A. shouldn'tB. mustn'tC. can'tD. wouldn't3. I think the most important thing is t

53、hat you really want to learn the language-without that , you won't get very far.A. have toB. willC. shallD. might4. Do I have to sell my old computer? It almost stops working.You do so, it only needs . Something has gone wrong with it. A. mustn't; to repairB. can't; repairingC. needn'

54、;t; repairingD. may not; to repair5. It Jack who is at the gate of our library.It him. I saw him off at the airport just an hour ago.A. can be; can't beB. must be; can't beC. can be; must have beenD. must be; can't have been6 . What a beautiful day! You take your umbrella at all.A. can&#

55、39;tB. needn'tC. mustn'tD. may not7 . Is that our math teacherIt be him. He has gone to London.A. canB. mayC. mustn'tD. can't8 . I heard they went skating in the mountains last winter.It true because there was little snow there.A. may not beB. won't beC. couldn't beD. will be9 . No one be more generous; he has a heart of gold.A. couldB. mustC. dareD. need10 .What a