吉林省伊通满族自治县第三中学校高中英语必修三：UNIT 2学案2 .doc

1、 English learning guide（Book3-Unit2） Designer：Du Chunyuan Examiner：Li Jingbo ContentModal VerbsTeacher来源:学科网来源:学科网ZXXKTypeNew lesson Learning aimsKnowledge: Learn the usages of the grammar Ability: The usages of the grammar Moral: The importance of cooperation. Learning important pointsThe usages of

2、 the grammarLearning difficult pointsThe usages of the grammarLearning methodsSummarizing and practicing Learning proceduresPersonal suggestionsI. Read the text again and find sentences with Modal verbs(情态动词)II. Grammar Explanation情态动词是表示说话人对某一动作或状态的态度，认为“可能” “应当”“必要”等等。情态动词本身有一定的词义，但是不能独立作谓语，只能和行为动

3、词一起构成谓语。情态动词用在行为动词前，表示说话人对这一动作或状态的看法或主观设想。 情态动词虽然数量不多，但用途广泛，主要有下列: can (could), may (might), must, need, ought to, dare (dared), shall (should), will (would) must not.1. should, ought toA 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should代替，但比should语气重。B. 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sho

4、uld。ought to的否定式为oughtnt to或ought not to。C. should, ought to都可表示推测。D. should 和ought to 后面跟动词不定式的完成式, 其肯定句表示“过去应该做而未做”, 其否定句则表示 “过去不该做但做了”。You should/ought to have made the decision a week ago.I shouldnt have made such a foolish mistake. 多数情况下，ought to可与should互换使用。ought to的反意疑问句用shouldnt替代。 2. must和h

5、ave to must的用法 1) 表示主观的义务和必要,主要用于肯定句和疑问句,意思为“必须，得，要”；由must引起的疑问句，肯定回答要用must或haveto,否定回答要用neednt或donthaveto, 意思是“不必” ； 2)must的否定形式mustnt表示禁止，意思是“不能，不许”。如： MustIfinishthetaskrightnow?我现在必须完成这个工作吗？Yes,youmust./Yes,youhaveto.是的。 (No, you neednt. / No, you dont have to. 不，不必。) You mustnt come here withou

6、t permission. (未经允许你不能来这儿。)III 练习题 用恰当的情态动词完成句子 1. You _go on working because you look so tired now. 2. The weather turned out to be fine yesterday. I _ have 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

7、 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 the meeting.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 _

8、 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. should be D. should have been4. -Is John coming by train? -He should, but he _ not. He likes driving his car. A. must B. can C. need D. may5. It has been

9、announced that candidates (候选人) _ remain in their seats until all the papers have been collected. A. can B. will C. may D. shall6. -I heard they went skiing in the mountains last winter. -It _ true because there was little snow there. A. may not be B. wont be C. couldnt be D. mustnt be 7. Its nearly seven oclock. Jack _ be here at any moment. A. must B. need C. should D. couldB.B writingsRethink and ask questions