Unit 5 The Value of Money 情态动词及过去将来时课件-2022-2023学年高中英语人教版（2019）必修第三册

UNIT 5 THE VALUE OF MONEY Express modality and talk about future events in the past Listen to the song There are things that must be done That are not yet begun Things that I must do When I want to be with you Although we’re far apart You’re with me in my heart No one else will do I just want to be with you I want to be with you Can’t you hear me? I need you near me I want to be with you I need you near me, my love They are used to express ability, obligation, possibility, intension, request, advice, etc. They are called modal verbs. Modal verbs have many functions as follow: A. necessity B. possibility C. obligation D. request E. advice F. intention How many modal verbs do you know? 需要 可能 职责/义务 要求 建议 意图 may / might must / have to shall / should will / would ought to need / dare can / could Modal verbs modal verbs 4 情态动词 情态动词有一定的意义，表示或暗示某种情绪或态度，表示可能、建议、愿望、必要、允许、能力等。 大多数情态动词有多个意义。 2. 情态动词没有人称和数的变化，即不随主语的不同而变化。 3. 情态动词不能独立使用，须后接动词原形，一起构成谓语动词。 只用作情态动词的: can/could, may/might, ought to, must 可用作情态动词也可用作实义动词的: need, dare 可用作情态动词也可用作助动词的: shall/should, will/would 相当于情态动词的: have to, used to 1. can & could _____you speak English ? Man _________live without air. Can cannot Can I smoke here ? Perhaps we can go out for a walk. I ’m afraid I can’t go with you. Can ability 指有能力做某事,意为”能够” permission 指请求、允许、建议 possibility 指可能性 Could He could swim when he was 5. Could you lend me some money ? can / could 与 be able to 的区别 be able to 与can/could意义相同，但常用于强调通过努力后能做某事，而且可用于多种时态。 考点 The fire spread fast, but everyone in the hotel was able to get out. 表示过去的能力 表示请求更加委婉 注意can 的惯用语 On hearing the story , I cannot help laughing . You cannot be too careful with them. cannot help doing sth. 忍不住做某事 cannot too “无论怎么样..也不为过,越…越好 2. may & might ① — May I watch TV after supper? — Yes, you may/can. / No, you can not/mustn’t. ② They may / might be having a meeting, but I’m not sure. ③ If that is the case, you may