[中学联盟]浙江省杭州市塘栖中学高中英语必修三教学课件：U2P4 Grammar.pptVIP

2. The boss has given everyone special holiday, so we ______ go to work tomorrow. (2007上海春) A. can’t B. mustn’t C. needn’t D. shouldn’t 3. — What do you think we can do for our aged parents? — You ________ do anything except to be with them and be yourself. (2007重庆) A. don’t have to B. oughtn’t to C. mustn’t D. can’t 表示能力: 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. 1. 表示能力、许可的情态动词的用法。 表示许可: 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。 2. 表示否定的情态动词的用法: mustn’t 不准; 禁止 needn’t 没必要 (= don’t have to) can’t 不能; 不可能 may not 不可以; 可能不 shouldn’t 不应该 (= ought not to) 部分情态动词的否定式是情态动词中的考点之一。 不同的“肯定”程度可按下列层次排列： He is at home. (事实) He must be at home. (非常肯定的推断) He could be at home. (很可能) He ought to be at home. (很可能) He may be at home. (仅仅可能而已) He might be at home. (或许, 非常不确定) He couldn’t be at home. (很可能不在家) He can’t be at home. (一定不在家) He isnt at home. (事实) 3. 情态动词shall, will的多种意义: shall / will + 动词原形: shall可表示必须、命令、警告或征询意见。 will可表示意愿、常出现的动作、在疑问句中表示请求和建议。 均可表示将来。 过去时为should, would。 4. 情态动词短语的使用: would like to do … would rather do … would rather + 从句 would prefer to do ... had better do ... 5. 用于虚拟语气的情态动词: should might could would needn’t ought to Review 复习下列情态动词： ought to / ought not to / have to / don’t have to / mustn’t / needn’t Individual activity 注: 另附 word 文档。 点击此处链接 I. Choose the best answer. 1. The weather turned out to be fine yesterday. I _____ the trouble to carry my umbrella with me. (2006江西) A. should have taken B. could have taken C. needn’t have taken D. mustn’t have taken 4. — What sort of house do you want to have? Something big? — Well, it _____ be b