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Ⅰ 选择适当的情态动词
1. According to the school rule, you ______ walk through the school gate without permission. (mustn’t/ needn’t)
2. There was a lot of fun at yesterday’s party. You ______ come. Why don’t you? (should/ought to have)
3. Mother is out. I will ______ stay at home to look after my younger sister. (have to /must)
4. He is from an English speaking country, so he ______ speak English well. ( can /may)
5. Finally they ______ escape from the burning building. (were able to / could)
6. The skyscraper was built on what ______ be a wasteland. (would/ used to)
7. I can’t believe that! How ______ he be so rude like this! (would/should)
Ⅱ 完成下面A、B两项练习
A. ought to
1. He ought to help his brother work out the problem. (改成否定句)
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2．Tom ought to go to have a rest. （改成一般疑问句）
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3．Such things ought to be done at once, _____________？（反意问句）
B. 用must, have to, can, ought to, used to和be able to 的适当形式填空。
1. In some parts of the world, you ______boil the water before drinking it.
2. The bus caught fire seriously, but the passengers ______escape from it.
3. He ______have stayed at home this morning. I saw him shopping in another city.
4. You ______ smoke in this part of the hospital.
5. You ______keep a simple first aid box at home for any accidents.
6. If she is completely well, she ______be back at school today.
7. My father ______be a heavy smoker, but now he has given up the habit.
8. ---You ______have finished the article. The deadline is last Friday.
---Sorry. I have been busy these days. Could you give me 3 days more?
9. She ______ breathe, so I used the mouth-to-mouth way.
10. He ______have caught a bad cold last night, for his forehead felt burning.
Ⅲ 单项选择
1. —How’s your tour around the
—It ________ be, but it is now heavily polluted.
A. will B. would C. should D. must
2. —Guess what! I have got A for my term paper.
—Great! You ______ read widely and put a lot of work into it.
A. must B. should C. must have D. should have
3. The teacher _______have thought Johnson was worth it or she wouldn’t have wasted time on him, I suppose.
A. should B. can C. would D. must
4. In crowded places like airports and railway stations, you___ take care of your luggage.
A. can B. may C. must D. will
5. My MP4 player isn’t in my bag. Where I have put it?
A. can B .must C .should D .would
6. The biggest problem for most plants, which ________ just get up and run away when threatened, is that animals like to eat them.
A. shan’t B. can’t C. needn’t D. mustn’t
7. —She looks very happy. She ______ have passed the exam.
—I guess so. It’s not difficult after all.
A. should B. could C. must D. might
8. —Where is my dictionary? I remember I put it here yesterday.
—You it in the wrong place.
A. must put B. should have put C .might put D. might have put
9. As a result of the serious flood, two-thirds of the buildings in the area .
A .need repairing B. needs to repair C. needs repairing D. need to repair
10. I told your friend how to get to the hotel, but perhaps I have driven her there.
A. could B .must C .night D. should
11. The boss has given everyone a special holiday, so we go to work tomorrow.
A．can’t B．mustn’t C．needn’t D．shouldn’t
12. —What does the sign over there read?
—“No person smoke or carry a lighted cigarette，cigar or pipe in this area．”
A．will B．may C．shall D. must
13. —My cat’s really fat.
—You ______ have given her so much food.
A. wouldn’t B. couldn’t C. shouldn’t D. mustn’t
14. —What do you think we can do for our aged parents?
—You ________ do anything except to be with them and be yourself.
A. don’t have to B. oughtn’t to C. mustn’t D. can’t
15. —Turn off the TV, Jack. ____ your homework now?
—Mum, just ten more minutes, please.
A .Should you be doing B. Shouldn’t you be doing
C. Couldn’t you be doing D. Will you be doing
16. When I was young, I was told that I ______ play with matches.
A. wouldn’t B. needn’t C. mustn’t D. daren’t
17. According to the air traffic rules, you __ switch off your mobile phone before boarding.
A. may B. can C. would D. should
18. — You ought to have called her yesterday . — Yes , I know I ____ .
A．ought to B．ought to have C．ought have done D．ought to have called
19. Why did you keep it a secret from me ? I ____ about it .
A．should be told B．ought to have been told
C．should have told D．ought to be told
20. If he had started at nine o’clock, he have been in
A．must B．may C．ought to D．has to
答案解析
Ⅰ 选择适当的情态动词
1.mustn’t 2.ought to have 3.have to 4.can 5.were able to 6.used to 7.should
Ⅱ 完成下面A、B两项练习
A.
1. He ought not (oughtn’t)to help his brother work out the problem.
2. Ought Tom to go to have a rest?
3. ought they?
B.
1. must/have to 2. were able to 3. can’t/couldn’t 4. mustn’t 5. ought to 6. ought to 7. used to 8. ought to 9. wasn’t able to 10. must
Ⅲ 单项选择
1. 答案：C 解析：该题考查的知识点是should的用法。根据对话的意思可以判断，the North Lake应该是很美的一个湖泊，但现在被污染了，言外之意，这个湖泊之美要打上问号。Should这个情态动词有“按理推测”的含义，可译成“理应……”等含义，符合对话的真实意图。will表“现在的自然倾向”，would表“过去习惯、倾向”，must 表“肯定推测”，均不符句意。
2. 答案：C 解析：must have done表示“过去肯定做了某事”。should have done表示“本该做某事而没做”。根据上文情景I have got A for my term paper可判断出一定进行了广泛阅读并做了大量工作。所以答案为C项。
3. 答案：D 解析：根据下面“否则她是不会在他身上浪费这么多的时间的”可以知道前面的意思是：老师一定是认为在Johnson身上花时间是值得的。must have done表示对过去情况的肯定猜测。
4. 答案：C 解析：句意为：在像飞机场和车站这样拥挤的地方，你一定要照看好自己的行李。must表示“必须，一定”，符合句意。
5. 答案：A 解析：由句意 “我的MP4不在我包里。我可能把它放哪儿了？”可知应选A。can have done表示“过去可能做过”，而must have done 表示“过去肯定做过”，只能用于肯定陈述句；should have done本应该做（而事实上没做）；would have done只能用于虚拟语气。
6. 答案：B 解析：can在此表示能力，can’t表示“不能”。此题所考查的知识点比较简单，但由于句子结构比较复杂，所以许多学生不是由于没有弄清知识点而误选，而是由于不理解句意而误选。全句意为：对于大多数植物来说，它们所面临的最大问题是(有些)动物喜欢以它们为食物，而当它们受到威胁时却不能起身逃跑。
7. 答案：C 解析：must have passed the exam表示“肯定是通过考试了”，由前句中的“happy”和下句中的“not difficult after all” 可以推知。
8. 答案：D 解析：本题考查情态动词表推测的用法。句意“我的词典哪儿去了？我记得昨天放在这儿了。”“你也许放错地方了”。由句意可以看出是对过去情况的推测，应该用“情态动词 + have done”的形式，故排除A、C两项；should have done sth.意为“过去本该做某事(而没做)”，故排除B项。答案为D项，might have done表示“可能做过某事”。
9. 答案：A 解析：句意为：由于猛烈的洪水侵袭，这个地区三分之二的建筑均需要修理。此题作主语的名词为复数形式，谓语动词用复数，need后边应用动名词的主动形式或不定式的被动形式。
10. 答案： D 解析：本题考查情态动词。could have done（过去）可能做过；本能够做……；must have done（过去）肯定做过；might have done（过去）可能做过；should have done本应该做（而事实上没做）。由句意“我告诉你朋友该怎么去旅馆，但或许我应该开车送她去那儿。”可知应选D项。
11. 答案：C 解析：考查情态动词的否定形式的特定含义。can’t的意思是“不可能”， shouldn’t表示“不应该”，mustn’t 与needn’t的意思大不相同，前者表示“禁止”，意思是：一定不能；后者表示“没有必要”，意思是“不必”，相当于don’t have to，从前句“老板放了我们假”，所以“明天没有必要上班”，故选C。
12. 答案：C 解析：shall用于第二、三人称，表示命令、允许、警告等，此处表示警告。will表示现在的意志、愿望等，意为“要，希望”；may表示许可，或用于请求许可，意为“可，可以”；must意为“必须，要，应当”。
13. 答案：C 解析：根据My cat’s really fat.可以知道是说“本不应该给猫太多食物却给了”所以答案为C。should / oughtn't to have done，意为本来不应做但实际已做，表达遗憾的感情色彩。
14. 答案：A 解析：句意：—你认为我们可以为我们年迈的父母做些什么事？—除了能真心地陪伴他们，你不必做任何事情。don't have to＝needn't“不必”；oughtn't to“不应该”；mustn't“不可以”；can't“不能”。所以答案为A项。
15. 答案：B 解析：本题结合交际用语考查should表语气的用法。should可表示惊奇、怀疑、不满等情绪。本题句意：—Jack，关掉电视。你现在不该写作业吗？—妈妈，就看十分钟。情态动词与进行时连用常有表达感情色彩的功能。故B项正确。
16.答案：C解析：句子的意思是：当我年轻的时候，（家人）就一直告诫我千万不要玩火柴。must的否定形式mustn’t 表示禁止，意思是“不能，不许”。
17. 答案：D 解析：本题考查情态动词的用法。句意“根据空中交通规则，登机前应该关闭手机”，情态动词should在此表示告诉某人应该做什么，故选D。
18. 答案： B 解析：简单对话中，只重复助动、系动词和情态动词，如既有情态动词，又有助动词或系动词，则两者都重复，不重复行为动词。
19.答案： B 解析: 表示应该做某事，但事实上没做到，应用“should / ought to +不定式的完成式”，本句为被动语态。
20.答案： C 解析： 如果他那时9点开始,就该在11点到伦敦。
