人教七下英语专题must和have_to(易错考点回顾+闯关提分训练)

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易错考点回顾】must和have to

【易错点睛】

1. 表示必须

此时可用于肯定句、否定句或疑问句，用于否定句时，mustn’t的意思是“一定不要、不能”。如：You must finish the work tonight. 你必须今晚完成这项工作。

Adverbs mustn’t be put between the verb and the object. 副词不能放在动词和宾语之间。

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2. 表示推测

意为“一定是”，通常只用于肯定句，表示有把握的肯定推测。

如：Jane’s light is on. She must be at home. 简的房间里开着灯。她一定在家。

3. must与have to的区别

must侧重于说话者的主观看法，认为有必要或有义务去做某事

Everyone must keep the law. 人人都要守法。

have to 则重于客观需要，含有“不得不”“被迫”之意

The last train has gone. We’ll have to walk home. 最后一班车已经开了，我们得走回家了。

从时态方面看，must 只有现在时一种形式，而have to则有多种时态形式。

如：You will have to show your papers at the gate. 在大门口你得出示证件。

【典型错题】

If you know nothing about the famous program called Where are we going, dad?, you _____ be living in a box!

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

【错因分析】本题的关键是对语境的理解，对句意的把握会直接影响能否正确判断空格处所缺情态动词的意思。其次，如果没有掌握选项中四个情态动词的用法，也会影响正确作答。

【思路点拨】首先要理解题干中句子的意思，然后弄清楚四个选项中情态动词的用法，再结合句意判断空格处要表达的是肯定推测“一定是”，再结合选项得出正确答案。

【正确答案】正确答案为C。句意：如果你对《爸爸去哪儿了》这个著名的节目一无所知，那你一定是生活在盒子里。根据上文提示此空是表示肯定的推测，“一定是”要用情态动词must，故选C。

【中考链接】

1. (2018 重庆)You _______ stop when the traffic lights(交通灯) turn red.

A. can'tB. may C. mustD. needn't

【答案】C

解析：句意：交通灯变红时你______停车。A. can’t不能，B. may可能，C. must必须，D. needn't不必，根据句意，答案选C。

2. (2017 福建) —Mum, may I go swimming now?

—Yes, dear, but remember that you ______ go with your dad.

A. mayB. canC. must

【答案】C

解析：句意：——妈妈，我现在可以去游泳吗?——是的，亲爱的，但是记住你必须和你爸爸一起去。may可以；can可能；must必须。根据语境可知这里用must。故选C。

3. （2017 黔西南州）—Must I leave now? It’s still raining hard outside.

—No, you ______.You can wait till the rain stops.

A. don’t have toB. couldn’tC. can’tD. shouldn’t

【答案】A

解析：句意：——我必须现在离开吗？外面还在下雨。——不，你不必．你可以等到雨停。don't have to不必；couldn't不能；can’t不能；shouldn’t不应该。在回答以must开头的一般疑问句时，肯定回答用Yes, sb. must，否定回答用No, sb. needn't或don't have to，结合句意，答案选A。









【闯关提分训练】must和have to

1. —Can you go shopping with us this afternoon?

—Sorry, I can’t. I ______ look after my little sister.

A. can              B. may              C. have to

2. —May I smoke here?

—No, you ________. This is a no-smoking room.

A. needn’t           B. mustn’t            C. need            D. wouldn’t

3. Someone is knocking at the door. It ______ be my mother. It’s time for her to be back.

A. can                B. may not            C. must            D. mustn't

4. You _____ take me to the station. My brother’s taking me.

A. can’t           B. mustn’t         C. shouldn’t        D. don’t have to

5. — Sorry, Miss Liu. I left my workbook at home. Must I hand it in(上交它) today?

— No, you ______. You ______ bring it here tomorrow.

A. mustn’t; should  B. can’t; must       C. mustn’t; may     D. needn’t; can

6. —Excuse me, sir, visiting hours(探视时间) are over. You _____ leave.

—Pardon me(对不起), nurse. I didn’t hear the bell(铃声).

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

7. The children ______ play basketball on the road.

A. can’t    B. can    C. mustn’t    D. must

8. You ______ go and see a doctor at once because you got a fever(发烧).

A. can       B. must    C. dare       D. would

9.—Mum, must I finish the homework now?

—No, you ______.You can do it after supper.

A. needn'tB. mustn't C. can'tD. may not

10. (2018 盐城一模）Sorry! I can't follow you. I ____ finish my homework first.

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

11. (2018·济南三模) —Must I answer the question in English?

—No, you _______.

A. can'tB. mustn't C. needn't    D. shouldn't

12. Yesterday it rained heavily when school was over. We _____ stay in our classroom

A. mustB. shouldC. had toD. need

13. I can’t go with you. I ______ stay at home until my parents come back.

A. canB. mayC. mustD. could

14.—Must I finish the work today?

—No, you ______. But you ______ finish it next Monday.

A. mustn’t; mustB. needn’t; mustC. mustn’t; couldD. needn’t; could

15. —______ you ______ wear your sports shoes for P.E. class?

—Yes, we do.

A. Have; toB. Do; haveC. Do; have toD. Does; have to

16. —May I go out now, Dad?

—Well, you _________ finish your school work first.

A. canB. mayC. needD. must

17. —Why can’t Nancy come to your party?

—Because she ______ do her homework.

A. canB. can’tC. has toD. doesn’t have to

18. (2018 河西区一模) Mike _____ finish the work at once. He can finish it tomorrow.

A. must B. have to C. shouldn't D. doesn't have to

19. We shouldn't arrive late for class. We ______ be on time.

A. mustB. mayC. couldD. can

20. It is in the library. You __________ talk loudly.

A. may notB. wouldn't C. needn't D. mustn't



参考答案：

1.C  2.B  3.C  4. D  5. D  6. C  7. C  8. B  9. A  10. C

11. C  12. C  13. C  14. B  15. C  16. D  17. C  18. D  19. A  20. D