高中英语《Unit2 Olympic Games》grammar导学案新人教版必修2

1、Unit2 情态动词2学习目标：掌握本单元情态动词Should,ought to, have to,mustnt ,neednt的用法；提高阅读理解的能力，学习重点：会正确使用这些情态动词的用法。学习难点：能辨别should与ought to 的区别；must与have to 的区别；mustnt ,neednt的用法。学习过程：Task 1:fill in the blanks.请同学们用学过的情态动词填空。1.She has been cooking all the morning. She be tired now.2. Dont tell anybody what I said. Yo

2、u _ keep it a secret.3. Perhaps he is in his office. =He _ be in his office. 4._ you like a cup of coffee?5. In China many children _ wear uniform(校服) when they go to school.6. You _ believe everything you read on the Internet.情态动词21. should, ought to都可表示“应该”。ought to用于表示按道理应当，常指客观的义务或责任，大多数情况下可用sho

3、uld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.表示劝告、建议或命令时，should和ought to可通用，但在疑问句中常用should。ought to的否定式为oughtnt to或ought not to。You should / ought to go to class right away.Should I open the window?What should we do next?2.haveto的用法1) must表示一种主观的需要

4、，而haveto表示一种客观的需要，意思是“不得不”。如： I have to attend an important meeting this afternoon. 今天下午我不得不参加一个重要的会议。Mother is out, so I have to look after the shop.妈妈不在家，因此我不得不照看商店。 2) haveto的否定形式是dont have to, 相当于neednt。如： They dont have to buy a computer at present. 他们目前没有必要买电脑。3.must的肯定形式表示“必须”，否定式表示“禁止、严禁”。 Y

5、ou must come here. You mustnt take the book away from the library. Task2:Choose suitable modal verbs below to complete the following dialogues.ought/oughtnt to ;should/ shouldnt ;mustnt ;neednt ; (dont) have to ; will ;can/ cant1 Sam: How can I grow thinner, Mum?Mum: Well, you _ eat food with plenty

6、 of fibre that helps you digest better. And you _ stop drinking cola or eating sweet food.Sam: Does it mean I _ eat my favourite fried chicken any more?Mum: Not exactly, if you love fried chicken, you _ give it up. Just eat it less often. You _ worry too much: a little fried chicken _ do you good! 2

7、 Doctor: You are sick because youve eaten poisonous mushrooms. Where did you get them?Lucy: I picked them in the forest. I know we _ eat fresh vegetables.Doctor: Oh, but you _ eat them until youre sure they are not poisonous.Lucy: Thank you, doctor. Ill be more careful next time.3 Charles: I wish I

8、could see things clearly in the dark. Tom: Eating carrots _ help you see better. You _ eat some every day.Task 3:用所给的情态动词填空。must; oughtnt to; dont have to; couldnt;mustnt; neednt; cant; have to1. You _ go on working because you look so tired now. 2. The weather turned out to be fine yesterday. I _ h

9、ave had the trouble to carry my umbrella with me. 3. If you earn more than 5,000, you _ pay tax. 4. You _ play now!You shall finish your homework first! 5. I know things are hard with you, but you _ try to get over the difficulties.6. I didnt see her at the meeting this morning; she _ have spoken at

10、 the meeting. Task 4:单选1. I thought you _ like something to read, so I have brought you some books. A. may B. might C. would D. must 2. Where is my pen? I _ it. A. might lose B. would have lost C. should have lost D. must have lost3. I didnt hear the phone. I _ asleep. A. must be B. must have been C

11、. should be D. should have been4. -Is John coming by train? -He should, but he _ not. He likes driving his car. (2002高考题） A. must B. can C. need D. may5. -I heard they went skiing in the mountains last winter. -It _ true because there was little snow there. (2002北京高考题) A. may not be B. wont be C. couldnt be D. mustnt be6. -