牛津上海版九年级上册 情态动词的用法讲解及练习（有答案）

情态动词的用法
一．定义：
情态动词主要用于表示说话人的态度和看法。情态动词不能单独使用必须与动词原形一起构成谓语，其否定式是在情态动词后加否定词not。一般疑问句则将情态动词提至句首。


二、基本形式：
肯定式
否定式
简略否定式
may
might
may not
might not
mayn’t
mightn’t
can
could
can not
could not
can’t
couldn’t
will, ’ll
would, ’d
will not, ’ll not
would not, ’d not
won’t
wouldn’t
shall
should
shall not
should not
shan’t
shouldn’t
must
must not
mustn’t
need
need not
needn’t
ought to
ought not to
oughtn’t to













三基本用法
1. can 的用法
1)表能力
can表能力时意味着凭体力或脑力或技术等可以无甚阻力地去做某事。
I can climb this pole. 我能爬这根杆子。
He is only four , but he can read. 他只有4岁，但已认得字了。
Fire can’t destroy gold. 火烧不毁金子。
2)表可能性
多用于否定与疑问结构中，但也可用在肯定句中。
Can the news be true? 这消息可能是真的吗？
It can’t be true. 它不可能是真的。
What can he possibly mean? 他可能是什么意思？
3)表示允许（和may意思相近）常见于口语。
Can (May) I come in ? 我能进来吗？
Can I smoke here ? 我可以在这里抽烟吗？

2.could的用法
1)表过去的可能和许可，
Father said I could swim in the river. 爸爸说我可以在河里游泳。
2)表过去的能力
I could swim when I was only six. 我刚六岁就能游泳。
3)表“允许”。可表示委婉客气的提出问题或陈述看法,不是can的过去时态。
---Could I use your bike? ---Yes, you can./No, you can’t.
注意：be able to 表示能力，意为“能够做成某事”，相当于can 的用法，但是有区别：can泛指
一般的能力；be able to 则主要指成功做了某件事的能力。

3. may（might） 的用法
1)表示请求、可以、允许。
You may drive the tractor. 你可以开那台拖拉机。
2)当回答由may 引起的问题时，否定答语要用must not,表示“不许可”、“不应该”、“不行”。
May I come in? Yes, you may. No, you can’t. No, you may not. No ,you mustn’t
3)might是may的过去式，语气比may更加委婉；

4. must 的主要用法
1)表示必须、必要
We must do everything step by step .我们必须按部就班地做一切事情。
Why must you always bother me? 为什么你偏要打扰我呢。
2)must be + 表语的结构，通常表示猜测，含有“一定”之意。（只用在肯定句中）
He must be an honest boy. 他一定是个诚实的男孩。
This must be your room. 这一定是你的房间。
3)must 的否定式有两个：
当回答由must引起的问题时，否定答复要用needn’t或don’t have to 表示 “必”、“无须”、“用
不着”、“不一定”的意义。
当表示“不应该”、“不许可”、“禁止”时，就用must not。
Must I go tomorrow?明天我必须去吗？
Yes, you must./No , you needn’t.
注意：must= have to. 但有区别: must 表示说话人的主观思想, have to “不得不,必须”,表示客
观需要,客观条件只能如此。
You must do it now. 你必需现在就干。(说话人认为必须现在干)
I have to go now. （客观条件必须现在走）

5. need 的主要用法
1） need作情态动词，表“需要”，多用在否定式或疑问句中.
Need I attend the meeting tomorrow?
-Yes, you must./No , you needn’t.
-You need not hand in the paper this week.
2）need也作实义动词，用法是need to do sth./sth
He needs to finish his homework in time.
I need your help.
3) need主动表被动的用法：sth needs doing=sth needs to be done.
The room needs cleaning.=The room needs to be cleaned.
4) need做名词的用法：
meet one’s needs=satisfy one’s demands in (great) need of（急需）

6.should的主要用法
意思为“应该”。表示劝告、建议、命令，其同义词是ought to；在疑问句中，通常用should代替ought to。
You should go to class right away.
Should I open the window?

7. ought “应当；应该”。用法则ought to do sth.
You ought to read these books if you want to know how to repair the motorcar.

8. shall的用法
意思为“将要/应该”
1)用于第一人称征求对方的意见，如：
What shall I wear on the journey? 我路上穿什么好呢？
Shall we dance? 我们跳舞好吗？

9. 情态动词will和would的用法
will (would) 表决心、愿望。 would 为 will 的过去式, 可用于各人称。
I'll do my best to catch up with them.
I'll never do it again, that's the last time.
He said he would help me.
注意：will, would用于第二人称疑问句表示说话人向对方提出请求或询问,用 would 比 will 更
婉转,客气。

10. may be与maybe
二者都有“或许，也许”的意思，但用法不同：
(1) . may be是情态动词，只能用于句子中，
如：It’s eight o’clock now. My father may be at home.
(2). maybe是副词，相当于perhaps, probably, likely，常用于句首。
如：It’s eight o’clock now. Maybe my father is at home.

11.had better 最好...
had better do sth. / had better not do sth. (重点)
You had better keep silent in class.

四、易错点：
(一)、can, may, must , need, should的提问与应答：
(1). Can I go to the cinema tonight?
Yes, you can./No, you can’t.
(2). May I have a look at your photos?
Yes, you may / can./No, you mustn’t / can’t.
(3). Must I book a ticket for the concert right now?
Yes, you must./No, you needn’t / don’t have to.
(4). Need I water the flowers in the garden in the afternoon?
Yes, you need / must./No, you mustn’t.

(二)、表示判断: may / may not, must ( be ) / can’t ( be )
(1). 判断语气坚定，有理有据（常摆出理由）
①. 肯定判断 （ must ）
e.g. The light in the office is on. Our teacher must be still working.
It must have rained last night, for the ground is wet and muddy.
②. 否定判断（can’t / can not）注：不能用must not 或mustn’t 形式
e.g. Mr. Green can’t be at home, for I met him at the street just now.
This book can’t be Betty’s. She doesn’t like detective stories.
(2). 判断语气不坚定，模棱两可，不确定，常附带有I’m not sure / I don’t know等句子。
e.g. —How soon will your father come back home from London?
—May be in a week, but I’m quite not sure.

课堂练习

I. Complete the following sentences according to the Chinese given. (根据中文提示完成下列句子。）
1. When he returned, he found his wife ____________________ (穿着昂贵的衣服）and giving orders to servants.
2. Be sure ______________________(喝额外多的水）when you are out in summer.
3. He has again ____________________ (从马上掉下来）.
4. The Science Camp offers a variety of science classes, trips, and ________________(真实生活体验).
5. He ____________________ (向我们说明了自己的计划）in detail.
6. I suggest you go on a diet and _____________________(多做锻炼）.

II.Complete the following sentences with proper words. The first letter of each word has been given. （用适当的单词完成下列句子，单词的首字母已给。）
1. F__________ often have animals as main characters.
2. These books attempt to e__________ why that is, and what, if anything, should be done about it.
3. Ted seldom travelled. The f___________ place he had travelled to was Chicago.
4. Usually as more and more rain f__________, the water in rivers rises and land floods.
5. We have a f___________ business. We hope it can be developed into an international one.
6. In 1964, the Beatles toured the United States, where they attracted millions of f__________.
7. Many years later, a Canadian scientist, George Kell, did an e_________. It proved that Sir Francis Bacon was right.
8. All the speakers believe that volunteering is a great way to contribute to the community and to gain e_________, and that it also promotes personal growth.
9. With one thing and another on my mind, I could hardly f__________ asleep.
10. I hardly know how to e_________ my thoughts and my feelings.

III. Sentence transformation. （转换句型，保持句意相同）
1. Mark has been ill for three days.
Mark __________ ___________ three days ago.
2. This red blouse is the same price as that blue skirt.
This red blouse is __________ __________ as that blue skirt.
3. The problem is not difficult at all. Everyone can work it out.
The problem is __________ __________ for everyone to work out.
4. Could you do me a favour?
Could you __________ __________.
5. My father is for owning a private car.
My father is in __________ __________ owning a private car.
keys：I. 1.dressed in expensive clothes 2. to drink extra water
3. fallen from his horse 4. real life experiences
5. explained his plan to us 6. take more exercise
II.1.Fables 2.explain 3.farthest 4.falls 5.family
6.fans 7.experiment 8.experience 9.fall 10.express
III.1.fell ill 2.as expensive 3.easy enough 4.give me a hand 5.favor of


I.Choose the best answer.选择填空。
1.Tom gets up early every day except Saturday or Sunday, because he ________ go to school.
A. mustn’t B. needn’t C. shouldn’t D. can’t
2.Thanks to the first development of communication technology, people in China ____ make phone calls anywhere at any time.
A. should B. would C. must D. can
3.Angela needs to download “Translating App” when she visits Spain. She ______ speak a single Spanish word.
A. mustn’t B. can’t C. needn’t D. shouldn’t
4.Can I fish here? –No, you ____. The sign says,“No fishing.”
A. mustn’t B. needn’t C. may not D. shouldn’t
5.If time allows, we_______ take a walk along the view path and take some photos.
A. can B. need C. must D. ought
6.Mum told me that I________be afraid of difficulties and should learn to be brave.
A. didn’t need B. needn’t to C. needn’t D. not need
7.This notebook ______ be Tom’s. Look at his name on the cover.
A. must B. mustn’t C. can D. can’t
8.Our road information system should be improved so that we _______ know the road condition ahead of time.
A. must B. should C. can D. could
9.By the time Jack was ten, he _____ speak Greek and German fluently.
A. would B. should C. might D. could
10.All passengers ______ go through safety check before they take the underground.
A. can B. may C. must D. shall
11.The government says actions be taken to stop child abuse(虐待儿童) in the kindergarten.
A. may B. can C. would D. should
12.Don’t treat the animals like that, John. We_______ take good care of them.
A. can B. should C. need D. may
13.Communicating with different people ______ help children learn to get along with others.
A. should B. need C. may D. must
14. According to the traffic rules, kids under 12 ________ ride bikes on the road.
A. may not B. mustn’t C. couldn’t D. needn’t
15.We shouldn’t put metal in the microwave. It _______ start a fire.
A. can B. should C. must D. need
16.You______ hurry to the meeting now because it is put off till 12:30 at noon.
A. shouldn’t B. needn’t C. can’t D. mustn’t
17. ---have you heard that some horrible things might happen in 2020?
---Don't worry! The news______ be true.
A)mustn’t B)may not C)needn’t D)can’t
18.---________We finish the project about the changes of our hometown in a month?
---No, you don't have to. You can finish it in one and a half months.
A) Must B)Can C)Should D)Would
19.In my job I________wear a uniform. I don’t mind because it’s quite smart.
A) have to B)ought to C)can D) may
20.Wendy________join our school football team next term, but she is not very sure.
A.should B.may C.must D.need
21.I heard the voices, but______make our(辨别) what they were saying.
A)couldn't B)wouldn't C)mustn’t D) shouldn’t
22. — ______ I fill in the check-in form right now, sir?
— No, you needn’t. You can complete it this afternoon.
A) May B) Can C) Need D) Must
23. He replied, with a big smile. "Oh, you ________ to worry about them."
A) need B) needn't C) not need D) don't need
24. –______ I park my car here for a while?
–No, you mustn’t. Do you see the sign“NO PARKING”?
A. Would B. May C. Must D. Should
25．— Must I go to medical school and be a doctor like you，Dad?
— No，you__________,son.You’re free to make your own decision．
A)can’t B)mustn’t C)shouldn’t D)needn’t
Keys: 1-5:BDBAA 6-10:CACDC 11-15:DBCBA 16-20:BDAAB 21-25ADDBD

I.Fill in the blanks with proper words.（根据短文内容，填出恰当的答案）
(A)
Jerry lived in a small town in America. She always wanted to help others when she was young. At the age of 5, she learnt about an organization named Locks of Love. It uses hair donations (捐献) to make wigs (假发) for children who have lost their hair because of cancer or other illnesses. Jerry then asked her mother to cut her long hair and send it to the organization.
At 8, she learnt that other children had no clean water in Africa, and she was shocked. When her school began raising money to build wells there, she asked her parents to stop holding her birthday party. Also, she asked her friends each to donate $9 to the project in Africa instead of giving her birthday presents.
One year later, it was her ninth birthday on June 12. She made a birthday page on the Internet with a goal of $300. But Jerry was able to raise only $200. This made her a little sad.
Unluckily, Jerry was badly hurt in an accident after eight days. That was terrible news to her friends. They wanted to find some ways of showing support to her. More and more friends began donating on her birthday page. Donations passed her $300 goal quickly and kept rising.
When it was clear that she would never come back to life, her parents donated her organ (器官) to other children. They also donated her hair a final time to Locks of Love.
More money was being raised. The total donations soon reached $100,000, then $300,000. So far more than $850,000 has been raised from all over the world, including donations from the Africans who are moved by the little American girl.
( )1. Locks of Love helps to _______ for children who have lost their hair because of illness.
A. cut long hair B. make wigs C. have big parties D. organize activities
( )2. To raise money to build wells in Africa, Jerry plans _______ her birthday party.
A. not to close B.not to cancel C.not to attend D.not to hold
( )3. How much did Jerry hope to raise on her birthday page _______.
A.$9 B.$200 C.$300 D.$500
( )4. More and more friends came to show their support to Jerry, so ________.
A.donations kept going up B.Jerry became better and better
C.$300 was used up quickly D.Jerry was badly hurt in an accident
( )5.Jerry’s parents donated her hair a final time to Locks of Love(Para.5) because ________.
A.Jerry herself had got a lot of money B.Jerry would not come back to life
C.her parents refused to donate more D.her parents had donated her organ instead
( )6.What can you learn from the last paragraph “More money…the little American girl”?
A.People all over the world are rich. B.Donation is a good business.
C.It’s fun to raise a lot of money. D.Love comes from all over the world.

(B)
Number sense is not the ability to count. It is the ability to recognize a change in number. Human beings are born with this ability. Surprisingly, ___1___ show that many animals are, too. For example, many birds have good number sense. If a nest(巢) has four eggs and you remove one, the bird will not notice. However, if you remove two, the bird generally leaves. This means that the bird ___2___ the difference between two and three.
Another interesting test showed a bird’s ___3___ number sense. A man was trying to take a photo of a crow that had a nest in a tower, but the crow always left when she saw him coming. The bird did not ___4___ until the man left the tower. The man had an idea. He took another man with him to the tower. One man left and the other stayed, but they weren’t successful in fooling the bird. The crow stayed away until the second man left, too. The test was ___5___ with three men and then with four men. It was not until five men went into the tower and only four left that they finally managed to take a photo.
How good is a human’s number sense? It’s not very good. For example, babies about fourteen months old ___6___ notice if something is taken away from a small group. But when the number goes beyond three or four, the children are often very confused.
It seems that number sense is something we have in common with many animals in this world, and that our human ability is not much better than a cow’s.
( )1.A.ideas B.plans C.experiments D.proverbs
( )2.A.went out B.found out C.looked out D.turned out
( )3.A.forgetful B.friendly C.amazing D.silly
( )4.A.escape B.return C.fly D. sing
( )5.A.repeated B.mentioned C.noticed D.produced
( )6.A.never B.rarely C.properly D.usually

(C)
Studying hard for a few days can be tiring, but it always pays off! Most people can clearly remember the fear they felt when they realized that an exam was coming near. If you are in this situation, don’t w___1___. Many people have proved that there is enough time to study if you arrange it well. Here are some tips to help you.
Calm down! Fear will only make your situation much w___2___. You will be focusing on the horror, not the coming exam. Many times, fear can even stop you from doing well in the exam. If you are nervous, take a deep b___3___, and tell yourself that you can do this well.
Study the most important topics first. Exams usually cover a few main ideas, contents, or skills. When you are short of time, focus all your energies on the k___4___ areas. Review the most important topics in textbooks and the parts your teacher said again and again. These are all clues for you to study first.
Decide what subjects you don’t know enough about. Do more study on these subjects because some parts probably still r___5___ reviewing, but they will come to you more easily this time. Then you can try to focus on more challenging(具有挑战性的) topics.
Studying t___6___ can be helpful. Since you don’t get any extra points for reviewing your lessons alone, classmates can be really helpful in studying. Ask for help from your parents, brothers or sisters. They may really enjoy being asked. From a study group, you not only have the advantage of studying with people who you are familiar with, you also have more c___7___ to make more friends and have more additional help through helping each other.

(D)
A jobless man wanted to apply for the position(职位) of “office boy” at a company. The manager interviewed him and then gave him a test: clean the floor. The man passed the test; he cleaned the floor very well.
“You are hired(雇佣),” the manager told the man with a big smile. “Give me your email address, and I’ll send you the table to fill out to be hired here.”
The man replied, “I don’t have a computer, or email!”
“I’m sorry,” said the manager. “If you don’t have email, that means you do not exist(存在). And we cannot hire persons who do not exist.”
The man was very disappointed. He didn’t know what to do. He only has $10 with him. Once that was spent, he wouldn’t have any money to buy even food. he went to the supermarket and bought a box of tomatoes with his $10. He went from door to door and sold the tomatoes in small bags in less than two hours. He doubled his money. He went on doing this three times, and went back with $80 that day. He realized that he could make a living this way.
Five years later, the man became one of the biggest food sellers in the company. He started to plan his family’s future. He decided to take out insurance on his life so that if he were to die, they would have enough money. He called an insurance broker, a man who sells insurance. At the end of the conversation, the broker asked him for his email address.
The man replied, “I don’t have email.”
The broker was very surprised. “You don’t have email, and yet have become so rich. Can you imagine what you could have been if you had email?”he explained.
The man thought for a while, and replied, “An office boy in a company!”
If you have lost your job or just failed an interview, it doesn’t matter. Think of the positive…Good days are on the way and something better will happen to you.
1. Was the manager satisfied with what the jobless man did in the test?
__________________________________________________________________________
2. Why didn’t the manager hire the jobless man?
___________________________________________________________________________
3. From the sentence “He doubled his money”, how much did the man have then?
___________________________________________________________________________
4. What did the man do in order to plan his family’s future?
___________________________________________________________________________
5. In the broker’s opinion, how would the man be if he had email?
___________________________________________________________________________
6. Which personality(性格) do you think makes the jobless man successful? Your reason?
___________________________________________________________________________
Keys:
(A) BDCABD
(B) CBCBAD
(C) 1.worry 2.worse 3.breath 4.key 5.require 6.together 7.chances
(D)1.Yes, he was.
2.Because he didn’t have email.
3.$20.
4.He decided to take out insurance on his life./By taking out insurance on his life.
5.The man would be more successful.
6.Never give up. Because success comes from your hard work and confidence.