湖南省株洲四中高中英语必修4：Unit 2《Sports events Grammar and usage》（译林版）同课异构课件 2.ppt

Unit 2 Sports events 2. To talk about obligation 3. To talk about uncertainty Practice: 2. Read Part A on page 31, and then complete the passage. 3. Read Part B on page 31, and then complete the passage. 1.Read the article on P29 and then complete it Answers must (2) has to (3) must (4) must (5) should (6) ought to (7) could (8) may (9) could Answers (1) can (2) dare (3) can/could (4) may/might/could (5) mustn’t/shouldn’t/can’t (6) mustn’t/shouldn’t/can’t (7) can (8)needn’t Answers Shall (2) shall (3) will (4) will/shall (5) will (6) will/shall (7) shall/will * 情态动词 modal verbs How many modal verbs do you know? can could may might shall should must will would ought to have to dare (daren’t) need (needn’t) used to 表示推测 不表示推测 modal verbs 1.To talk about ability 2. To talk about obligation 3. To talk about uncertainty 4. To talk about permission 5. To make requests 6. To make suggestions 7. To make offers 8. To give advice 不表示推测时,注意以下用法： can, could, be able to *be able to 能用于各种时态。 can / could 只能表示现在或过去的能力。 *was / were able to : “设法做成某事” 相当于 managed to do sth. succeeded in doing sth. All the people trapped in the burning house were able to get out of it. 1.To talk about ability ought to/should have to must *have to 能用于各种时态,且有人称和数的变化. ought to 的否定式为ought not to/oughtn’t to 强 might may should ought to will must 强 may / might, can / could * might, could 比较委婉, 一般多用于疑问句. * can, may 表达的语言比较随便. * 在以could, might 表示征询对方意见 或表示请求时，回答应相应使用can, may. 4. To talk about permission will can could would 5. To make requests 6. To make suggestions Shall we dosome exercise this morning? 7. To make offers 8. To give advice Shall I get a ticket for you? You should not/ought not to eat a lot before swimming. 1. A computer ______ think for itself; it must be told what to do. A. can’t