初中英语情态动词讲解练习及答案.doc

1、1情态动词一、 考点、热点回顾【词汇辨析】1. sometimes/ some times/sometime/ some time: sometimes: “有时”=at times. He is sometimes late for school.some times: “几次 ” I have been to Nanjing some times.sometime: “某一时刻” I bought it sometime last spring.Well meet again sometime next week. some time: “一段时间” We have to stay her

2、e for some time.2. many/ much/ a few/ a little/ few/ little(1)many 修饰可数名词，much 修饰不可数名词；都表示许多。例如：许多书 许多牛奶 (2)a few 和 a little 都表示“ 有一点儿“，侧重于肯定，相当于“some“ ，但 a few 修饰可数名词，a little 修饰不可数名词，例如：He has a few friends in London. -Would you like some coffee? -Yes, just a little. (3)few 和 little 表示“ 几乎没有 “，侧重否

3、定。few 后接可数名词，little 后接不可数名词。例如：He is a strange man. He has few words. Hurry up, there is little time left. 【固定搭配】加-ingbe busy doing sth. 忙于做 eg: Mother is busy cooking.look forward to + doing sth. 期待做 eg: Tom looks forward to seeing his father again.Thank you for (doing) sth. 为了感谢你 eg: Thank you for

4、 your help.have fun doing sth 愉快地做某事 eg: I had great fun playing in the water.=have a good time doing sth eg: I had a good time playing in the water.have problem/trouble/difficulty (in)doing sth.做某事有困难eg: I have difficulty finishing my homework in 2 hours.【情态动词】 又叫情态助动词。它们具有以下特点： 它们必须与其他动词连用，即：情态动词动

5、词原形表示说话人对所述动作的看法，如需要、可能、意愿或怀疑等。 绝大多数情态动词没有人称和数的变化，即第三人称单数不加-s（以 be 和 have 开头的情态动词短语除外）。 在意义上，情态动词具有“多义性”。例：can 既可表示能力，又可表示可能、允许等意义。【情态动词的基本用法】1. can 的基本用法： 表示体力或智力上的能力，即“能够，会”，可与 be able to 转换。例：He can speak English. = He is able to speak English. Can you play basketball? No, I cant. 如果表示将来具备的能力，要用

6、will be able to。例：If I have a good sleep, I will be able to do the problem. 表示许可，主要用于口语，书面语一般用 may。例：Can we go home now, please? No, you cant. You can only smoke in this room. You cant keep the library books for more than a month. 表示“可能”，与 may 同义，但一般用在疑问句中。例：What can he possibly want? 在否定句中，否定形式 can

7、t 表示推测“不大可能”。例：Anybody can make mistakes. The news cant be true. 与第一、二人称连用时，还可以就可能的解决问题的方式或可能的行为提出建议。在这里，也可用 could 使语气婉转。例：Can / Could we meet again next week? 下周我们可以再见面吗？2What shall we do? 我们怎么办呢？ We can / could try asking Lucy for help. 我们可以请露茜帮忙试试看。You can / could help me with the cooking. 你可以帮我做

8、饭。2. may 的基本用法: 表示“许可”，用 can 比较口语化。例：You may / can come if you wish. 如果你想来，你就来。You may not pick flowers in this park. 本公园内不许摘花。（may not 表示按规定不许可，如果用 mustnt 则表示说话人不许可。）May I smoke here? 我可以在这里抽烟吗？No, you mustnt. 不行。（ mustnt 表示明确的禁止。） 肯定句中表示推测，“可能”。例：It may rain tomorrow. 明天可能会下雨。The news may not be t

9、rue. 这个消息可能不会是真的。注意：如果在 疑问句 中表示“可能”，通常用 can。例：Can it be true? 那会是真的吗？Who can he be? 他究竟是谁呢？ 【注意】： May I/we？Yes, you may./No, you mustnt. 3. must 的基本用法: 表示必须，强调说话人的主观意志。例：I must go now, or Ill be late. You must be here by ten oclock. 【注意】：表示“必须“时，must 的否定式为 neednt ，或 dont have to ,而不是 mustnt。也就是：Must

10、 I/we do it now？Yes, you must . No, you neednt /dont have to . 例：Must I go with them? No, you . 表示推测，一般只用于肯定陈述句,表示非常肯定。例：She didnt look at me. She must be angry. 她不朝我看，一定是生气了。He is good at English. He must know the word. 他英语好，准知道这个词。You must be Mr. Jones. 想必您就是琼斯先生吧。4. have to 的基本用法：have to 可视为情态动词，

11、但它与其他情态动词在用法上稍有不同。其他情态动词没有人称和数的变化，而 have to却有人称和数的变化，要视主语的不同而变化。例：I / You / We / They have to. He / She / It has to. You dont have to.Does she have to?have to =have got to，意思是“必须，不得不”。和 must 不同之处： must 强调主观需要have to 强调客观需要。例：Sorry, I have to leave now. 对不起，现在我得走了。Ive got to go to a meeting. 我得去参加一个会

12、议。Will he have to work deep into the night? 他将不得不工作到深夜吗？5. need 的基本用法：need 的基本词义是“需要” ，它既可作情态动词，又可作实义动词。 need 用作情态动词时，只用于否定句和疑问句。它只有一种形式，后接动词原形。例：I dont believe you need worry. 我相信你没有必要焦急。Need we go so soon? 我们需要这么早就去吗？ Yes, we must. / No, we neednt. 是的，必须。不，不必。So I neednt tell him, need I? 所以我不需要告诉

13、他，对吧？请比较以下两句话的不同意思：You neednt buy the coat. 你没有必要买那件外衣。（你还没买）You neednt have bought the coat. 你没有必要买这件外衣的。（而你却买了）3【注意】： Need I/we？Yes， you must ./No, you neednt / dont have to . need 用作 实义动词 时，有时态、人称和数的变化。如果人作主语，一般后接带 to 的动词不定式。即 need to do sth；如果物作主语，一般后用 need to be done 或 need doing sth。例如：I need

14、to look up this word in the dictionary. My watch needs mending/to be mended. 我的手表需要修理了。We dont need to work today. (= We neednt work today.) Does he need to go right now? (= Need he go right now?) 6. had better 的基本用法：had better 常略作d better 。现代语法认为它是一个助动词，因为它后接不带 to 的动词不定式。had better do sth 意思是“ 最好做某

15、事；还是做某事比较好”。例：Youd better get some sleep. 你最好睡一会儿。Youd better not do that again. 你最好别再做那件事。What had we better do now? 我们现在怎么做才好呢？Hadnt we better tell her the truth? 我们是否最好不告诉她真相?【注意】： Youd better.表示劝告或委婉的命令，对长辈不宜使用。7. could, should, would, might 表示推测：. must 多用于肯定句中表示把握性极大的推测,意思为“一定、肯定”。如: You have w

16、orked hard all day. You must be tired. 你已辛苦工作一整天了,一定累了。The book must be his. His name is on the cover. 这本书一定是他的,封面上写着他的名字。【注意】 must 不表推测时, 在肯定句中意思为“ 必须( 强调内在的职责)”, 在否定句中意思为“不许、禁止”,以它开头的疑问句否定回答常用 neednt 或 dont (doesnt) have to。如:We must obey the traffic rules. 我们必须遵守交通规则。Cars mustnt be parked here. 此

17、处严禁停车。Must we hand in the papers this week? 我们必须本星期交论文吗?No, you neednt. 不,你们不必( 本星期交)。 . can / could 多用于否定句、疑问句或感叹句中表示推测、怀疑,两者在时间上没有差别。用 can 时不相信的程度更强一些, cant 常常译为 “不可能” 。如:The man under the tree cant be Tom. Hes gone to England. 这个人不可能是 Tom,他已经去英国了。Can it be true that he was fooled by a five-year-o

18、ld boy? 他被一个五岁的孩子愚弄了,这能是真的吗?Could this be an excuse? 这会不会是个借口?How can you be so careless! 你怎么这样粗心!.may / might 多用来表示把握性不大的推测,意思为“也许、可能”, might 比 may 的把握性更小一些。may not 在否定句中常常译为 “可能不” 。( 注意区分“不可能 ”与“可能不”在把握性大小上的差异。)如:Mr. Wang may know Professor Lis telephone number.王先生也许知道李教授的电话号码。This might be the ke

19、y Tom has been looking for.这可能就是汤姆一直在找的钥匙。She may not be there today. 今天她可能不在那儿。二、 典型例题 【中考链接】（ ）1Who is the man over there? Is it Mr. Li? No, it _ be him. Mr. Li is much taller.A. mustnt B. may no C. cant D. neednt（ ）2Must I go with them tomorrow？ No，you _. A. mustnt B. shouldnt C. neednt D. cant（

20、）3_ I take some photos in the hall? No, you _.A. Can, neednt B. Must, mustnt C. Could, wont D. May, mustnt（ ）4Dad, must I finish my homework today?No, you _. You may do it tomorrow.A. neednt B. mustnt C. dont D. wont（ ）5The lake is said to be dry. Is that true?It _.Look, some kids are swimming in it

21、.A. must be true B. cant be true C. may not be true（ ）6What is your mother going to do this Saturday?Im not sure. She _ go to see my grandmother.A. can B. must C. may4（ ）7Susan has bought a large house with a swimming pool.It _ be very expensive. I never even dream about it.A. must B. might C. cant

22、D. shouldnt （ ）8Listen! Is Professor Johnson giving a report in the hall?No, it be him. He has gone to Japan.A. neednt B. may not C. mustnt D. cant（ ）9Lets go to the West Hill Park by taxi.Oh, it is not far away from here. We _take a taxi.A. couldnt B. mustnt C. neednt D. cant（ ）10Can you play the p

23、iano?Yes, I _. I often practice it on weekends.A. neednt B. need C. cant D. can 三、课后练习一、用 can, may, must, need, have to, had better 的适当形式填空：1. You _ return the library book on time.2. I _ (not) find the way to the hospital. _ you show me the way?3. _ I finish the work right now? No, you _ (not). You

24、 _ do it later.4. He said he _ (not) come tonight.5. Her mother was ill. She _ stay at home and look after her.6. Its time for class. You _ stop playing football or you _be late for class.7. We _ start right now, or they would get there first.8. The cloud is lifting, so it _ (not) be a rainy day tom

25、orrow.二、选择填空（ ）1.Do we have to finish our homework this afternoon?Yes, you _.A. must B. can C. may D. need（ ）2. Must I be in hospital for a week， Doctor? No， you . You can go back home tomorrow. A. mustnt B. neednt C. must （ ）3. The desk is not dirty. You _clean it.A. mustnt B. shouldnt C. neednt C.

26、 cant（ ）4. May I watch TV for a while？No, you _. You have to finish your homework first. A. shouldnt B. neednt C. mustnt D. wont（ ）5.Is Jessica giving us a speech this evening?No, it _be her. She_ to Japan.A. mustnt; has gone B. mustnt ;has been C. cant ;has gone D. cant ;has been（ ）6. Its the libra

27、ry! So you_ know shouting is not allowed here.A. can B. must C. need D. may（ ）7. Boys and girls, dont forget your report . It _ today. A. cant finish B. cant be finished C. should finish D. should be finished（ ）8.Mr Smith must have been to your home this morning.No, he _ ,because he didnt know my ad

28、dress.A. couldnt B. cant C. mustnt D. may not（ ）9. Must I mop up the window now?No, you_.A. neednt B. cant C. shouldnt D. mustnt（ ）10. Is Lucy knocking at the door?No. It _ be Lucy. She is in Japan now.A. neednt B. must C. cant（ ）11. Another cup of coffee?No, thanks. I _ be off. Mary is waiting for

29、me.A. can B. may C. must D. might（ ）12. Im a little tired. Lets go to the zoo by taxi.We take a taxi. Its not far from here. A. cant B. mustnt C. couldnt D. neednt（ ）13. If the traffic light is red, you _ cross the road. Its very dangerous.A. dont B. mustnt C. neednt D. wouldnt5（ ）14. Must I finish

30、watering the flowers now?No, you_.A. must B. wont C. neednt D. cant（ ）15. I cant give up smoking, doctor.For your health, Im afraid you _.A. may B. can C. have to D. must（ ）16. It is usually warm in my hometown in March, but it _ be rather cold sometimes. A. must B. can C. should D. would （ ）17. Our

31、 class won the English speaking contest.Congratulations! You _ be very proud of it.A. can B. need C. would D. must（ ）18. Excuse me, where are we going to have our class meeting?Im not sure. Ask our monitor, please. He know.A. can B. may C. need D. shall （ ）19. _I borrow these magazines?Sorry, only t

32、he magazines over there can be borrowed.A. Must B. Would C. May D. Need （ ）20. If the traffic light is red, you _ cross the road. Its dangerous.A. dont B. neednt C. mustnt D. wouldnt6情态动词典型例题例 1 答案 C 分析：表示否定的猜测用 cant 。must 表示推测时，意为“一定” ，只能用于肯定句，而 must的否定 must not（mustnt ）表示“不应该”、“不许可” 、“不准 ”、“ 禁止”等。

33、例 2 答案 C 分析：在回答带有 must 的问句时，否定式常用 need not (= neednt)，表示“不必”，而不用 must not，因为 must not 表示“ 不可以 ”。例 3 答案 D 分析：本题第一句是请求对方的允许，需要用 May，其否定式为 mustnt。例 4 答案 A。对于以情态动词 must 提问的疑问句，否定回答要用“No, 主语+neednt” ，故由问句中的 must 和答句中的 No 可选 A。例 5 答案 B 例 6 答案 C例 7 答案 A 考查情态动词 must 表示肯定的推测。结合关键信息“I never even dream about i

34、t.”可知题意为“它肯定是非常贵的”，故排除 B、C、D 三项。例 8 选 D。本题考查 cant 表示否定的推测。四个选项都是情态动词的否定形式，分别意为“不能；不可能”、“千万不能”、 “应该 ”、 “可以；可能”。结合关键信息“He has gone to Japan.”可知“他不可能是约翰教授”应选 D。例 9 选 C 例 10 选 D。以 can 引导的一般疑问句再作肯定回答时还是用 can。课后练习一、1. must 2. cant, Could 3. Must, neednt, may 4. couldnt 5. had to 6. must, may 7. had better

35、 8. cant二、 1A2B3C4 选 C。对于情态动词 may 的一般疑问句的肯定回答为： Yes，you may / can . 否定回答为：No, you mustnt.5C6B7D8A9A10 选 C。考查情态动词 cant 表示推测的用法。cant 表示否定的推测； must 表示肯定的推测。由题意“ 不可能是露西，她现在在日本”可知应选 C。11 选 C。考查情态动词 must 的用法。结合关键信息“Mary is waiting for me.”可知题意为“ 我必须离开了”，故排除 A、B、D 三项，选 C。12 选 D。四个选项都是情态动词的否定式，结合关键信息“Its no

36、t far from here.”可知“我们不必乘出租车”，故排除 A、B、C 三项，选 D。13 选 B。考查情态动词 mustnt 的用法。mustnt 意为“ 一定不能”，由“很危险”可知用 mustnt，故选 B。14 选 C。考查对 must 开头的一般疑问句的回答。以 must 开头的一般疑问句，作否定回答时用情态动词neednt，故正确答案为 C。15 选 C。考查情态动词 have to 的用法。may 意为“可能、或许” ，can 意为“能、会”，have to 意为“必须、不得不”，表客观要求，而 must 表主观愿望。根据题意“为了健康，你必须戒烟”可选 C。16 选 B17 选 D18选B。考查情态动词may 表示推测。结合前句“Im not sure. Ask our monitor, please.”可知题意为“他可能知道（我们将在哪里开班会） ”，故选B 。may表示可能性的推测，常用在肯定句中。19 选 C 20 选 C