广东省惠州市第四中学英语必修三 Unit 2 Grammar复习教学设计 无答案

第 1 页 必修三 Unit 2 Grammar 教学设计 一、复习练习： can may shall should would must 1. I _________ keep my balance when I learn to ride a bike. 2. You _______ pay attention to your diet. You are too fat. 3. We ________ keep quiet in the library. 4. Tom doesn't come to school today. He _______ get ill. 5. He promised that he _______ get good grades next time. 6. If you steal things again, you ________ be put into prison. 二、学习： 1. should和ought to a. should, ought to都可表示“应该”。ought to用于表示按道理应当，常指_____________，大多数情况下可用should代替，但比should语气重。 I should help her because she is in trouble. You ought to take care of the baby. b. 表示劝告、建议或命令时，should 和ought to可通用，但在________中常用should。ought to的否定式为oughtn’t to或ought not to。 You should / ought to go to class right away. 我可以开窗吗？______________________ 你不应该离开的这么匆忙。You _____________________ (ought to) leave in such a hurry. c. should, ought to都可表示推测。 He ought to / should be home by now. This is where the oil ought to / should be. 注意：should和ought to后面跟动词不定式的完成式, 其肯定句表示“_______________________”, 其否定句则表示“_____________________”。 You __________________________ the decision a week ago. 你应该在一周前就做决定。 I ___________________ such a foolish mistake. 我不应该犯这样愚蠢的错误。 多数情况下，ought to可与should互换使用。ought to的反意疑问句用shouldn’t替代。 2. must和have to must的用法 1) 表示________________, 主要用于________________, 意思为“必须……，得……，要……”；由must引起的疑问句，肯定回答要用____________________, 否定回答要用_________ 。don’t have to, 意思是“不必” ； 2) must的否定形式mustn’t表示_________，意思是“不能，不许”。如： — Must I finish the task right now? — Yes, you must. / Yes, you have to. (— No, you _______. / No, you don’t have to.) You mustn’t come here without permission. have to的用法 1) must表示____________________，而have to表示一种客观的需要，意思是“不得不”。如： 第 2 页

I have to attend an important meeting this afternoon. Mother is out, so I have to look after the shop. 2) have to的否定形式是don’t have to, 相当于needn’t。如： They don’t have to buy a computer at present. have to的第三人称单数形式是has to，一般过去式是had to，一般将来式是will have to。 e.g. Li Hua has to pass an examination before he can start work. My car was broken, so I had to walk home. It’ll have to be on a Sunday. I’ll be working every other day. 练习： 1、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 2、─ 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 3. must和need a. need作情态动词时, 只能用于_______________。构成否定句和疑问句时不借助于助动词do。 — Need I finish the work today? — Yes, you must. / No, you needn’t. b. must的肯定形式表示“__________”，否定式表示“______________”。 You must come here. You mustn’t take the book away from the library. need 1. 情态动词，肯定： 否定： 2. 实义动词， 肯定： 否定： 1. You ____to the meeting this afternoon if you have something important to do. A needn’t to come B don’t need come C don’t need coming D needn’t come dare 敢 1. 情态动词，肯定： 否定： 2. 实义动词， 肯定： 否定： 1. 在晚上我不敢一个人看鬼片。 In the evening I _______________ horror movies alone. 4、“情态动词＋have done”结构的用法 must have done _____________________ may / might have done ______________________ would have done _______________________ could have done _______________________ couldn’t\can’t have done _______________________ 第 3 页

should (ought to) have done ______________________ need have done __________________________ needn’t have done ___________________________ 练习：Ⅰ、选择： 1. I didn’t hear the phone. I ____ asleep. A need be B must have been C need have been D should have been 2. Peter ___ come with us tonight, but he isn't very sure yet. A must B may C can D will 3. “Shall I tell John about it?” No, you ___. I've told him already.” A needn't B can't C mustn't D shouldn't 4. Johnny, you ___ play with the knife; you ___ hurt yourself. A won't; can't B mustn't; may C shouldn't; must D can't; shouldn't Ⅱ、翻译句子 1．你本不必提起那个人。 You ________________________the person. 2．明天我不得不参加一个重要的会议。 I ______________an important meeting tomorrow. 3．你一定不要玩火，否则你将会被烧。 You _____________with fire，or you'll get burnt. 4．在这么长的时间里，他本应该已经完成了工作。 He ____________________________the work in such a long time. 5．我的自行车出了些问题，所以它需要修理。 Something is wrong with my bike，so it ___________________________________. 6．Mary本不该说话的，但她想要警告你远离那个人。 Mary _____________________________ the words, but she wanted to warn you against that man. 作业：Translate the following sentences. 1. I _______________ (得接受) your suggestion. 2. You _________________ (你不能来这儿) without permission. 3. You _________________ (应当去照顾) your brother. 4. I think you _________________ (应当去看) the doctor. 5. The teacher told the students that they ____________________________________ (不应该在课堂上沉默不语) all the time. 6. You ______________________ (就得不到我的支持) if you do such a thing. 7. — I waited for the train for two hours at the station this morning. — Well, you ________________________(本来没有必要那么早去的). 8. “You _____________________ (你千万不要再喝酒了),” the doctor warned him.