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四级英语中的情态动词
1. 形式：情态动词 + 动词原形do;
情态动词 + 动词完成进展时have been doing;
情态动词 + 动词完成时have done
2. 特点：
1) 不管哪一种形式，情态动词的词义都在句中起作用。
2) 情态动词的过去时、现在时没有太大的时间性区别，只是情态动词的过去时用得相对较多，语气比现在时更客气、委婉、缓和。
例： I was wondering if you would like to have dinner with me tonight.
3) 都表示在一定时间对发生和出现的事情进展推测、猜想、判断等。
a) 对现在的事情进展把握较大的判断时
肯定判断一般用must加动词原形，此时，must不再表示必须，而是表示肯定。
否认判断时一般用cant加动词原形，此时，can不再表示能够，而是表示肯定不、肯定没有。
例： He cant be in his own dorm. He must be in Xiao Wangs dorm. Listen! Thats hes singing.唱歌。
)
b) 对过去的事情进展把握较大的判断时
肯定判断一般用must加动词的完成时形式，同样，must不再表示必须，而是表示肯定。
例：19xx年1月四级第41题
Marys score on the test is the highest in her class; she have studied very hard.。
TEM4 情态动词历年真题1.Which of the following sentences expresses "willingness"? 2012A.By now she will be eating dinner. B I shall never do that again.C.You shall get a promotion. D My brother will help you with the luggage.2. Which of the following best explains the meaning of “Shall we buy the tickets first”? 2012A.He said that we were going to buy the tickets first.B.He requested that we buy the tickets first.C.He suggested that we buy the tickets first.D.He advised us to buy the tickets first.3. Nancy's gone to work but her car's still there. She ____ by bus. 2010A. must have goneB. should have goneC. ought to have goneD. could have gone4. She _____ fifty or so when I first met her at a conference. 2009;2007A. had beenB. must beC. has beenD. must have been5. Aren’t you tired? I ____ you had done enough for today. 2009A. should have thoughtB. must have thoughtC. might have thoughtD. could have thought6. Which of the following sentences expresses "probability"? 2008A. You must leave immediately.B. You must be feeling rather tired.C. You must be here by eight o'clock.D. You must complete the reading assignment on time.7.“You ______ borrow my notes provided you take care of them,” I told my friend. 2007A.couldB.shouldC.mustD.can8. Loudspeakers were fixed in the hall so that everyone______ an opportunity to hear the speech.A ought to haveB must haveC may haveD should have 20069. I am surprised__ this city is a dull place to live in. 2006A that you should thinkB by what you are thinkingC that you would thinkD with what you were thinking10. I went there in 1984, and that was the only occasion when I ________ thejourney in exactly two days. 2005A. must takeB. must have madeC. was able to makeD. could make11. You _____Jim anything about it. It was none of his business.a. needn‘t have toldb. needn’t tellc. mustn’t have toldd. mustn’t tell 200012. He ______unwisely, but he was at least trying to do something helpful.a. may have actedb. must have actedc. should actd. would act 199913. Much as______, I couldn’t lend him the money because I simply didn’t have that much sparecash.a. I would have liked tob. I would like to havec. I should have to liked. I should have liked to 199914. You ______Mark anything. It was none of his business.a. needn’t have toldb. needn’t tellc. mustn’t have toldd. mustn’t tell 199815. As it turned out to be a small house party, we _____so formally.a. need not have dressed upb. must not have dressed upc. did not need to dress upd. must not dress up 199616. The meeting’s been cancelled. Ann _____ all that work.a. need to dob. need havec. needn’t have doned. needed not to do 199517. We could ____him with a detached house when he came, but he had specifically asked for a small flat.95A. provideB. have providedC. not provideD. not have provided18. “She must be in the dormitory now.” “No, she ____ be there. I saw her in the classroom a minute ago.”a. mustn’tb. can’tc. couldn’td. wouldn’t 199419. He _____ the 8:20 bus because he didn’t leave home till 8:25.a. couldn’t have caughtb. ought to have caughtc. shouldn’t have caughtd. must not have caught 1994“”“”At the end, Xiao Bian gives you a passage. Minand once said, "people who learn to learn are very happy people.". In every wonderful life, learning is an eternal theme. As a professional clerical and teaching position, I understand the importance of continuous learning, "life is diligent, nothing can be gained", only continuous learning can achieve better self. Only by constantly learning and mastering the latest relevant knowledge, can employees from all walks of life keep up with the pace of enterprise development and innovate to meet the needs of the market. This document is also edited by my studio professionals, there may be errors in the document, if there are errors, please correct, thank you!。
（完整版）情态动词归纳大学专四语法情态动词有can (could), may (might), must, have to, shall (should, will (would), dare (dared), need (needed), ought to等。
情态动词无人称和数的变化；不能单独使用，必须与其后的动词原形构成谓语。
一、can, could1) 表示能力（体力、知识、技能）。
Can you lift this heavy box?（体力）Mary can speak three languages.（知识）Can you skate?（技能）此时可用be able to代替。
Can只有一般现在时和一般过去式；而be able to则有更多的时态。
I’ll not be able to come this afternoon.2) 表示请求和允许。
-----Can I go now?----- Yes, you can. / No, you can’t.此时可与may互换。
在疑问句中还可用could,might代替，不是过去式，只是语气更委婉，不能用于肯定句和答语中。
----Could I come to see you tomorrow?---- Yes, you can. ( No, I’m afraid not. )3) 表示客观可能性（客观原因形成的能力）。
They’ve changed the timetable, so we can go by bus instead.This hall can hold 500 people at least.4) 表示推测（惊讶、怀疑、不相信的态度），用于疑问句、否定句和感叹句中。
Can this be true?This can’t be done by him.How can this be true?二、may, might1) 表示请求和允许。
Modal V erbs情态动词情态动词表示说话的语气或情态。
情态动词本身有词义，但不完全，不能单独作谓语，必须和动词一起构成谓语。
情态动词没有人称和数的变化。
大多数情态动词有过去式。
主要情态动词：can, may, will ,must ,shall ,need, dare, had, better, would, sooner, would, as soon, could, might, would, have to, should, ought to, used to, would rather, might, as well情态动词问题解析:1. may be & maybeMay be （可能是）—maybe （或许）（副词）The news may be true.Maybe the news is true.She may be waiting for you at home.Maybe she is waiting for you at home.2. May not & can notmay not 译为“可能不”、“也许不会”而非“不可以”。
“不可以”为must not或can't（不许，不可以）。
---May I smoke here?---No, you mustn't. /you can't /you can not.The news may not be true.Y ou mustn't move any of the papers on the desk.3. Can & be able toBe able to 可以表示更多的时态。
We will be able to finish the work tomorrow.He was not able to realize his greatest ambition.Are you able to design a new computer program?She has not been able to work out the complex problem.4. ought to的否定式ought to的否定式是ought not to，疑问句只把ought提前。
