《初一情态动词讲解及练习.doc》由会员分享，可在线阅读，更多相关《初一情态动词讲解及练习.doc（4页珍藏版）》请在金锄头文库上搜索。
1、情态动词常见的情态动词 Can, could, may, might, must, shall, should, need, will, would, dare, had better, have to, used to.含义：表示说话人对所述动作的看法，如需要、可能、意愿或怀疑等。用法特点： 它们必须与其他动词连用，即：情态动词动词原形；否定： 表示说话人对所述动作的看法，如需要、可能、意愿或怀疑等。情态动词通常没有人称和数的变化，即第三人称单数不加-s，有些情态动词有时态的变化 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。各情态动词的用法 （1）Ca
2、n： 表能力，“能，会”； 表可能，猜测，通常用于否定句和疑问句中，This boat cant be hers, hers is black.（2）could：表can的过去式；表请求允许，用于现在时和将来时，比can更委婉地提出请求。 （3）May: 表猜测，“可能”（只能用于肯定句，否定句用cant） 表征求同意，May I come in? （4）Might: may的过去式； might比may更加委婉。 （5）Must: 表义务的“必须” 表事情的必要性和重要性。 You must take care of your parents. 表推测的“一定，准是”（只有肯定猜测，否定猜测
3、用cant） The lady must be a doctor. （6）Shall: 用于第一人称的疑问句中，表示征询意见。 “应该”，多用于法律等条文中。（7）Should: 表义务或责任“应该”。 （8）Need: 表必要性。 （9）Will: 表“意愿，意志” （10）Would: will的过去式； 表示意愿或用于第二人称的疑问句中，表礼貌委婉的请求，比can更委婉。 （11）Had netter: 最好， （had better not） （12）Have to: “不得不” （dont have to Do+s+have to ） （13）Used to: 过去常常 (usedn
4、t to / didnt used to / Did + s+ use to)C 易混的情态动词 （1）Can/ could 与be able to: 表“能力”时 can只有现在和过去时两种时态，其余时态用be able to, can指与生俱来的能力，be able to后天形成的能力。（2）含有情态动词的疑问句的回答:1.对may引出的问句，可以有下列回答方式：Yes,you may. Yes, of course.Yes, certainly.Sure . No, you cant.2.对must引出的疑问句，回答方式为：Yes, must. No,dont have to./3.co
5、uld在疑问句中，表示委婉的语气，此时could没有过去式的意思。如:Could you do me a 你能帮我个忙吗？Could I use your pen?我能用一下你的钢笔吗?Yes, you can.可以。（注意回答）4. shall引出的疑问句用于第一人称，表示征求对方意见或客气的请求。其回答方式有以下几种：Yes, please.All right. No, thank you.5.would you的回答方式有以下几种：Yes, I will. (No, I wont.)Sure . (Im sorry , I cant.)All right/ OK/ With pleasu
6、re.Certainly. (No, thank you .)Yes, please.（3）Must 的否定形式：mustnt “不许，禁止”（must表推测时无否定形式，否定猜测用cant）（64）Need：作实义动词时，后接名词、动名词、动词不定式 She doesnt need to take any medicine. 作情态动词时后接动词原形。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
7、the hospital. _ you show me the way?3. _ I finish the work right now? No, you _ (not). You _ 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 no
8、w, or they would get there first.8. The cloud is lifting, so it _ (not) be a rainy day tomorrow.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. ne
9、ednt C. must （ ）3. The desk is not dirty. You _clean it.A. mustntB. shouldntC. neednt C. 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. mu
10、stnt; has gone B. mustnt ;has been C. cant ;has gone D. cant ;has been（ ）6. Its the library! So you_ know shouting is not allowed here.A. canB. mustC. needD. 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.M
11、r Smith must have been to your home this morning. No, he _ ,because he didnt know my address.A. couldntB. cantC. mustntD. may not（ ）9. Must I mop up the window now? No, you_.A. needntB. cantC. shouldntD. mustnt（ ）10. Is Lucy knocking at the door?No. It _ be Lucy. She is in Japan now.A. neednt B. mus
12、t C. cant（ ）11. Another cup of coffee?No, thanks. I _ be off. Mary is waiting for 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 roa
13、d. Its very dangerous.A. dont B. mustnt C. neednt D. wouldnt（ ）14. Must I finish 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 class won the English speaking contest.Co
