13 can, may, must, should等情态动词没有人称和数的变化,而have to有.它的第三人称单数为“has to , 过去时为had to He has to study hard. He had to walk to school because he got up late yesterday. 15 can, may, must, should等情态动词在一般疑问句中将它们放在句首, 在否定句中直接在它们后边加not即可.而“have to 要加助动词do, does, did, don’t, doesn’t, didn’t等才可能完成其疑问.否定句. Can he go with us? He can’t go with us. He has to go to see the doctor. Does he have to go to see the doctor? Yes, he does. He doesn’t have to go to see the doctor. 28 have to强调客观上需要做某事.即表示外界条件的需要“不得不 做某事.含有“客观所迫 的意味.它有人称和数的变化.可用于多种时态中.否定式为“不必 .must强调说话者主观上认为必须做某事.含有“主观判断 的意味.它的否定式意为“禁止.不允许 . I have to help my parents. She has to go to school by bus. We must go to school on time. Must I finish the homework now? Yes, you must. No, you needn’t. 查看更多

 

题目列表(包括答案和解析)

用could, can, may, must, needn't填空。
1.  A: _______you answer the question in English?
    B:  Sorry, I_______._______I answer it in English.
    A: No, you _______.You _______answer it in Chinese.
2. A: _______I ask a question?
    B: Yes, you________.  But you _______wait a minute.
3. A: _______I use your eraser, Bill?
    B: Sorry.  I don't have one.  Ask Mary.  She _______ have one.
4.  A: _______you help me do the shopping?
    B: OK. Sure.
5.  A: _______you sweep the floor?
    B: But_______  finish my homework first.
    A: OK.  You_______ do it at once.

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用情态动词 could, can, may, must, need 的正确形式填空。
1. —_______you answer this question in
   —Sorry, I_______.  _______I answer it in English?
   —No, you_______. You _______answer it in Chinese.
2. —_______ I ask a question?
    —Yes, you _______But you_______wait a minute.
3. —_______ I use your eraser, Bill?
   —Sorry, I don't have one. Ask Mary. She_______have one.
4. —_______you help me do the shopping?
   —OK, sure.
5. —_______you sweep the floor, please?
   —OK, but I_______finish my homework first..

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选用适当的情态动词填空。
(can, may, must, can't, mustn't. )
1.________ you speak French? No, I ________, but Mr. Black ________.
2.________ I use your knife? Certainly.
3.________ we go out and play football now? No, you ________. You ________ finish your
     homework first.
4.She ________ hear you clearly. Please speak a little louder.
5.How long ________ I keep this book? You ________ keep it for two weeks.

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用could, can, may, must, need't 填空。
1. A: ____ you answer the question in English?
    B: Sorry, I ____ ____  I answer it in English? 
    A: No, you ____. You ____ answer it in Chinese.
2. A: ____ I  ask a question?
    B: Yes, you ____. But you ____ wait a minute.
3. A: ____ I use your eraser, Bill?
    B: Sorry, I don't have one. Ask Mary. She ____ have one.
4. A: ____ you help me do the shopping?
    B: OK. Sure.
5. A: ____ you sweep the floor?
    B: Yes. But I ____  finish my homework first.

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  Except for a few times, Americans are not big present-givers. There's no exchange of presents among business people, and if one American tries to give another a present, it may look like that he wants to bribe (贿赂) him. Americans have learned that in some other countries people like to give presents to others, but among ourselves we don't see the need for presents.

  Even friends may never exchange presents. When I go to foreign countries, I try to bring back little things for close friends, but nobody would feel unhappy if I didn't. I don't often remember a friend's birthday, and few people outside of my family remember mine. If someone gave me presents too often, I'd get unpleasant. But a present from a foreigner - that kind from his or her homeland — won't go wrong, except to government employees (政府职员) who can't be given presents.

  You usually open a present at once and in front of the person who gives it except Christmas and birthday presents. You should only say, "It's so nice. Thanks…" when you get Christmas or birthday presents.

  You may want to bring a bottle of wine (葡萄酒) or flowers to a dinner party, but you're never asked to. Nobody will mind if you bring wine, but your friend may not use it that evening.

  At Christmas we often give presents to our family and sometimes our friends. We also give presents to people who have been helpful during the year- doormen, babysitters, housecleaners, newspaper senders— anyone who has often helped us.

(  )11. What does "close friends" mean in the passage?

  A. The friends who are very kind.

  B. The friends who live close to each other.

  C. The friends who were once classmates.

  D. The friends who you like most.

(  )12. What kind of presents don't Americans usually open in front of the givers?

  A. The small presents.        B. Christmas or birthday presents.

  C. The expensive presents.     D. The presents for dinner party.

(  )13. Why do Americans also give presents to housecleaners at Christmas?

  A. To pay them.         B. To help them.

  C. To thank them.          D. To make them work harder.

(  )14. Which of the following do you think is right?

  A. American business people don't want presents because they are rich enough.

  B. The writer of this passage must be an American.

  C. Everyone must give presents to one's family and friends at Christmas.

  D. Government employees can get little presents from a foreigner.

(  )15. What is the main idea of the passage?

  A. Present-giving in the United States.

  B. Customs (习俗) in the United States.

  C. American people and present-giving.

  D. When and how to give presents.

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