2020学年牛津上海版八年级第二学期英语专项讲解及训练
I. 情态动词（有词义, 与动词原形一起组成谓语, 无人称与数的变化）
can, may, must, need, should, shall, will, could, would, ought to
Fish can swim.
Can I help you?
May I leave early? No, you may not.
May I smoke here? No, you mustn’t.
Must I finish it today? No, you needn’t.
You should pay more attention about your health.
Shall I book the tickets for you?
Can/Could/Will/Would you help Linda with her physics this weekend?
You oughtn’t to go there alone.
注意: should=ought to都是情态动词
can=be able to must=have to mustn’t=be not allowed to needn’t=not have to
但be able to, have to, 有时态、人称与数的变化,
中考真题:
1.A: Must I get up early tomorrow, Dad?
B: No, you ______. Tomorrow is Sunday.
A. can’t
B. mustn’t
C. needn’t
D. couldn’t
2.A: ______ I have some chocolates now?
B: No, you ______. It’s time for bed. You can have some tomorrow.
A. May…mustn’t
B. Must…needn’t
C. Must…mustn’t
D. May…needn’t
3.After a long walk, the old man ______ be tired now.
A. can
B. must
C. has to
D. need
4. Even the top students in our cla ss can’t work out this problem, so it ______ be very difficult.
A. may
B. must
C. can
D. need
5. Computers ______ process difficult problems very, very quickly.
A. must
B. need
C. should
D. can
6. Cars, buses and bikes ______ stop when the traffic lights change to red.
A. can
B. may
C. must
D. need
7. Susan’s parents have bought a large house with a swimming pool. It ______ be very expensive.
A. must
B. can
C. mustn’t
D. can’t
8. We ______ keep the new traffic law and learn how to protect ourselves.
A. may
B. should
C. can
D. need
9.-- ______ 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. Would
D. Must
答案:CABBD CABD
II. Fill in the blanks with the given words in their proper forms(用所给单词的适当形式填空,每空格限填一词) :
1.The old people and children _________ (should take) good care of.
2.The letter __________ (must post) at once.
3.Now many kinds of work __________ (can do) by robots.
答案:1. should be taken 2.must be posted 3.can be done
III. Rewrite the sentences as required (按要求改写句子,每空格限填一词):
1.We can store a lot of information in the computer. (改为被动语态)
A lot of information _______ _______ stored in the computer.
2.Mrs. White told Tom that he mustn’t throw paper on the ground. (保持原句意思)
Mrs. White told Tom _______ ______ throw paper on the ground.
3.I don’t know when we shall leave for Nanjing. (保持原句意思)
I don’t know when ______ ______ for Nanjing.
4.We must keep the noise under 50 dbs (分贝)here. (改为被动语态)
The noise must ______ ______ under 50 dbs here.
答案: 1. can be 2. not to 3. to leave 4.be kept
[ 同步精练]
I. Choose the best answer（选择最恰当的答案）：
( )1. A: ________ I take the book out?
B: Yes, but you ________ return it before next Thursday.
A. Can, may
B. May, must
C. May, need
D. Need, must ( )2. You made quite a few mistakes in the test. You ________ be more careful next time.
A. can
B. may
C. should
D. mustn’t ( )3. A: ________ I go and get some sugar? B: Yes, please.
A. Must
B. Shall
C. Could
D. Would
( )4. She is glad to find that her daughter ________ sing so well.
A. must
B. can
C. may
D. need
( )5. He has worked the whole day. He _______ be very tired.
A. can’t
B. mustn’t
C. can
D. must
( )6. Mum, you _______ help me. I can manage it by myself.
A. don’t need
B. needn’t
C. mustn’t
D. can’t
( )7.A: ______ I make the decision right now?
B: No, you _______. You can think it over for a couple of days.
A. May, may not
B. Must, mustn’t
C. May, mustn’t
D. Must, needn’t ( )8. Both passengers and cars _________ stop when the traffic lights are red.
A. can
B. must
C. may
D. need ( ) ( ) 9. Excuse me, sir. Can children under the age of ten ride bicycles in the city?
B: No. According to the law, they _________.
A. may not
B. mustn’t
C. shouldn’t
D. needn’t
答案:BCBBD BDBB
III. Rewrite the sentences as required (按要求改写句子,每空格限填一词):
1.The teachers teach Japanese and French in the private school. (改为被动语态)
Japanese and French ______ ______ in the private school.
2.We must finish the work in two days. (改为被动语态)
The work ________ _______ finished in two days.
3.Can you see the mice running in the cave? (改为被动语态)
Can the mice ________ _______ in the cave?
4.Factories mustn’t let out dirty smoke into the air. （保持原句意思）
