GrammarModal verbs 情态动词 (I)

一、情态动词表推测（可能性）• must/can/could/may/might• 1) He must be a teacher. • (1993 全国 ) Peter may come with us

tonight, but he isn’t sure yet. • He might get here in time. • 2 ） There is no light on---they can’t b

e at home.(06quanguo) • This may not be done by him. • 3 ） Can this be done by him?

表猜测，用于肯定句中，“一定” 表猜测，常用于否定、疑问句中译为“可能”的三个词 。可能性程度的顺序是：could﹥ may﹥ might must____→can’t_____mustn’t__________may/might not________couldn’t_______

表猜测的情态动词 ( 语气 ) must

cancould may might

一定 不可能禁止；不允许

可能不不可能

Must 表示 “一定” , “ 必定”等推测意义时 ,只用在肯定句中 . 否定句疑问句用 “ can”

• 这一定是真的。• 这不可能是真的。• 这可能是真的吗？• 这有可能是真的。• It may not/might not be true.

• It couldn’t be true.

• 这不可能是真的。

It must be true.

It can’t be true.

Can it be true?

It could/may/might be true.

•这可能不是真的。

- Is the person a man ? -No, it _____ be a man. In my opinion, it _____ be a woman. - Can you guess where she is from ? - She __________be from England. - What is she ? - She _______________be a waitress. - What is she doing now ?- She ________ be teaching people how to use the knife and fork.

Modal verbs: must, can/ could, may/might

can’tmust

may/might

may/might/could

may

1.---Can I tell my best friend about it?

---No, I don’t want anyone else to know it. You ______ keep it to yourself.

A.can B.need C.must D.may

2.---Christmas is drawing near. Are you going to Beijing for the holiday?

---I haven’t decided yet. I _______ go home, but it all depends.

A.must B.shall C.need D.might

3.If you think the price of pork is too high, you ______ as well buy some beef. It depends on you!

A.should B.will C.would D.may

4.I can hear the Browns’ phone bell ringing but no one is answering it; they _______ be at home.

A.would B.might C.needn’t D.can’t5.--Look, it ___ be Lao Wang. --No, it ___ be him. He has gone abroad. A. may ； must B. must ； mayn’t C. must ； can’t D. can ； mayn’t6. (NMET2008 全国 II) Liza ___ well not want to go on the trip --- she hates traveling. A. will B. can C. must D. may

挑战高考

7.(02 全国 )---Is John coming by train? --- He should be, but he ___ not. He likes driving hi

s car. A. must B. can C. need D. may8. (02 北京 )---I heard they went skiing in the mount

ains last winter.---It ___ true because there was little snow there.A.may not be B. won’t be C. couldn’t be D. mustn’t be9. (04 上海 )You might just as well tell the manufact

urer that male customers ___ not like the design of the furniture.

A. must B. shall C. may D. need

挑战高考

• 10. (04 全国 )--- Isn’t that Ann’s husband over there?• --- No, it ____ be him---I’m sure he doesn’t wear gla

sses. • A. can’t B. mustn’t • C. won’t D. may not• 11. (04 湖北 ) --- Excuse me. Is this the right way to t

he Summer Palace? • ----Sorry, I am not sure, but it __ be. • A. might B. will• C. must D. can

挑战高考

二、情态动词表能力 can / could / be able to1.A left luggage office is a place where b

ags ____ be left for a short time, especially at a railway station. (2003 全国 28)

A.should B. can C. must D. will

2. Even though I had hurt my leg, I ____ swim back to the boat. ( 99 海淀 )

A. could B. might C. had to D. was able to

情态动词 意思 例句

can, 现在或一般能力 A computer can’t think for itself; it must be told what to do.

could 过去一般的能力（不表示做或未做某事）

She could sing like an angle when she was a child.

be able to

各种时态的能力 If you have a good sleep, you will be able to work out this problem.I am able to do it myself.

was/were able to

过去有能力并且做了某事 =managed to do sth /succeeded in doing sth

The fire spread through the hotel very quickly but everyone was able to escape.

三、情态动词表必要 ( 必须 / 必需 ) must / have to / need（ 09 湖南）— It’s the office! So you know eating is not allowed here. — Oh, sorry. A. must B. will C. may D. need基础知识回顾：1.—Must /Need we hand in our English exercise books ?—Yes, you ________. (No, you ____________/_____________. )2. The film is not interesting. I really ______ go now. 3.I _______ work when I was your age. (must/have to)4.You ________ ( 不许 )play with fire, it’s dangerous.

must

needn’t don’t have to must

had to

mustn’t

四、 will / shall / would / should1.If you will listen, sit still.2.He push the door, but it won’t open.3. Fish will die without water. 4.Shall I go with Tom?5. Shall the book be put here?6.He would sit like that for hours.7.You shall do as your father says.8.We should obey these school rule.

Exx.1. “ Thanks for lending me the bike, ___ it be put here?” “ Yes, you may put it here just as well.”A. Does B. shall C. will D. Dare2. You ___ go to the party if you don’t finish your homework first.A. won’t B. don’t C. oughtn’t D. shan’t3. --“ ____ Miss Ann stay out or be shown in, Sir?” (05 福州质检 ) --“Wait out a moment, please.” A. Does B. Shall C. May D. Will

Exx.4.We tried hard to stop him from going, but

he just ____. A. won’t B. wouldn’t C. didn’t D. hadn’t5. I’ve told him many times, but he ___ liste

n to my advice. A.shan’t B. won’t C. couldn’t D. wasn’t able to6.When I was a boy, I ____ go swimming in t

he river. When I was a boy, I ___ often swim in the

river which is now polluted seriously.A. would B. should C. used to D. went

A

C

7. Mum tried to persuade Dad not to smoke, but he just ____ listen. (05 温州市适应测试二）

A.wouldn’t B. couldn’t C. shouldn’t D. mustn’t8.(06 北京 25)--“ What’s the name?”--“ Khulaifi. ___I spell that for you?” A.Shall B. Would C. Can D. Might

注意： can/should/must 特殊用法1 .A wise man can sometimes make a mistake. Everyone can make mistakes.1)It is usually warm in my hometown in March, but it___be rather cold sometimes.(2008福建 )A. must B. can C. should D. would2.(95 全国 )It’s nearly seven o’clock. Jack should be here at any moment. 1). (2007 全国 I 27)“ How is your tour around the North Lake? Is it beautiful?”“ It ___ be, but it is now badly polluted.” A. will B. would C. should D. must

Can 表示一时可能性

• 2 ） You _____ wear slippers in class.• A.can B.should C.must D.can• 3) ___ you change your mind, do let me know.• A.can B.should C.must D.can

• 3. must 表示偏要 . 硬要做某事 ; 偏偏• --- How old are you, madam? --- If you must know, I’m twice

my son’s age.• 1 ） ----- Who is the girl standing over there?• ------ Well, if you ____ know, her name is Mabel. （ 02 ，天津

）• A. may B. can C. must D. shall

Should 表示 ① “应该”， ②“竟然”， ③ “假如，万一”。

1.“ ____ you make so much noise? The baby is sleeping.” (05 全国八联 )

“ Terribly sorry, never again.”A. must B. Can C. May D. Need 2.It is unbelievable that a well-behave

d gentleman ____ be so rude to a lady.

A. will B. can C. might D. should (05 合肥市质检二 )

• 3. （ 2007 辽宁 30 ） ---Turn off the TV,Jack._____your homework now?

• ---Mum,just ten more minutes, please.

• A.Should you be doing

• B.Shouldn’t you be done

• C.Couldn’t you be doing

• D.Will you be doing

1.--- ____ I take the book out? (10 四川 ) --- I'm afraid not. A. Will B. May C. Must D. Need2.  You ___ park here! It’s an emergency exit.(10重庆 ) A. wouldn’t B. needn’t C. couldn’t D. mustn’t3.  Just be patient. You ___ expect the world to change so soon. (10 全国Ｉ ) A. can’t B. needn’t C. may not D. will not4.  I’m afraid Mr. Harding ___ see you now. He’s busy. (10 全国 II) A. can’t B. mustn’t C. shouldn’t D. needn’t5.  “You ___ have a wrong number,” she said. “There’s no one of that name here.” (10 浙江 ) A. need B. can C. must D. would

6.  ----May I take this book out of the reading room?( 10 陕西 )----No, you ___ . You read it in here. A. mightn’t B. won’t C. needn’t D. mustn’t7.  Doctors say that exercise is important for health, but it ___ be regular exercise. (10 辽宁 ) A. can B. will C. must D. may8.  ----Good morning. I‘ve got an appointment with Miss Smith in the Personnel Department.（ 10 北京）----Ah, good morning. You___ be Mrs. Peters. A. might B. must C. would D. can

9.  ----I haven’t got the reference book yet, but I’ll have a test on the subject next month. （ 10 江苏） ----Don’t worry. You ___ have it by Friday. A. could B. shall C. must D. may10.  You___buy a gift, but you can if you want to. （ 10 湖南） A. must B. mustn't C. have to D. don't have to11. It is important to know about the cultural differences that ___ cause problems. （ 10 上海春） A ． must B ． dare C ． need D ． may