(
课件网) Modal Verbs 情态动词 Fourteen Modal auxiliaries Can -- could May--might Will--would Shall -- should Must Need Dare Ought to Used to Main points Ability and Possibility (表能力和可能) Permission and Refusing (许可和不许) Obligation and Necessity (义务与必然) Prediction and predictability (预测与推测) Willingness, intension and determination (意愿、意图与决心) Warm-up tasks 1. Advocates of studying abroad believe students will reach new levels of intercultural understanding far exceeding what they _____ be able to accomplish just at home. will B. would C. can D. could 2. Timothy Ray Brown, the first man cured of HIV，initially opted against the stem cell transplantation that _____ history. could have later made should have made later C. might make later D. would later make Ability (能力) and Possibility (可能) ★ can, could, be able to can, could, may, might, 1. Ability: can/could/be able to can: could: be able to: She could play the piano when she was six. They were able to get everybody out of the burning building. Can you call back tomorrow？ We can pass the exam after 4 months of study English grammar. present or future past all-purpose (通用) (general and specific) (only general if positive) (specific) You’ll be able to get a taxi outside the station. I haven’t been able to get much work done today She’d love to be able to play the piano. Can, could or be able to Edison always wondered why hens _____ hatch chickens while he _____. could was not able to A big fire broke out in ABC hotel yesterday. Luckily, everyone _____ run out of the building. was able to Be able to refers to managed to do it. 2. Possibility: could & may/might 1) could, may, might (用于肯定句): time: certainty: Where are my keys They could/may/might be in the car. I could/may/might go to the party tonight. Where was he last night He _____ have missed his train. could, may & might: present and future could＞may＞might could/may/might could/may/might have done: past 2) Can (in negative & question) It can’t be true. Can the news be true The moon cannot always be at the full. where can she have put it In negative: In question: To be sure sth is not true. 肯定不真实 To express doubt or surprise. 究竟，到底，难道 He can be very tactless. It can be quite cold here in winter. We can eat in a restaurant, if you like. I can take the car. Sb /sth is often like (常有的行为和情形)有时会，时而可能 To give suggestion (提建议)可以 Other meanings of can She may not be at work. They might not have left yet. It is possible that she is not at work. It is possible they have not left yet. Negative transfer Difference of may not and might not 1. A: Where is Tim B: He might be next door. What is the function of the modal auxiliary verb “might" in the reply A. To express relief. B. To dramatize a fact. C. To indicate possibility. D. To ask for permission. Practice Permission (允许) and refusing (拒绝允许) can, may, could, might may ... ...
