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课件网) Unit 1 Food for thought Using language —Listening Modal Verbs U1 Grammar—Modal Verbs Read the sentences from the passage and work out the meanings of the words in bold. Table manners have to dare not had better needn’t / don’t have to be able to 情态动词 情态动词短语 现在式 过去式 can could be able to may might must have (got) to shall should ※ought to will would Now, Let's check the answers and see who did the best. Modal verbs Activity 2: Look at the sentences from the reading passage. Think and work out the meanings of the words in bold. a. … I was able to hold a knife and fork - and chopsticks! b. But there are still some dishes that Dad dare not try even after many years of marriage to my mother. c. … Mum and I just have to find a way to get him into the kitchen! d. … we'd better not eat too much roast food as it may make us suffer from heat inside our bodies, ... e. “You needn't try it if you don't want to,” Mum said, … 1. be afraid to do something 2. not be necessary to do something 3. give advice to do or not to do something 4. be necessary or give strong advice to do something 5. have the ability to do something Pair work Work in pairs and talk about the function of modals. Then match the meanings to those modal verbs. a-5 b-1 c-4 d-3 e-2 总结情态动词 be able to, dare&need, have to, had better的用法 Modals 情态动词 (1) 情态动词（Modals）本身具有一定的词义，不能独立作谓语，必须和动词原形一起构成谓语。情态动词虽然数量不多，但用途广泛。 常用的情态动词包括can (could), may (might), will (would), shall (should), must, need, dare, had better, ought to, used to等。 be able to后接动词原形，表示某人做某事的能力，可用于大多数时态。用于过去时态时，还可以表示“某人过去或当时成功地做了某事”。例如： I will be able to speak Japanese in another few months. 再过几个月，我就能讲日语了。 They were able to escape from the building when the fire broke out. 火灾发生时，他们设法从那栋建筑里逃了出去。 1. be able to be able to表示“能力”时，和can的用法相似。但也有区别： be able to有多种时态，如: was / were able to, will / shall be able to, have / has been able to等, 而can只有两种时态，即can和could。 be able to强调通过努力而获得的能力，而can则强调自身已具有的能力。如： She can sing the song in English. 她能用英语唱这首歌。 He will be able to sing this song in English in a few minutes, too. 几小时之后，他也能用英语唱这首歌。 【be able to 与can的辨析】 be able to 强调一种结果，而can只强调一种可能。如: Luckily, he was able to escape from the big fire in the end. 幸运的是，他终于逃出了大火。 If he got here a few hours earlier, I could save him. 要是他早几小时来，我还能救他。 be able to的否定形式是在be后面直接加not，即be not able to，如： The kid is not able to write. 这孩子不会写字。 But we may not be able to do this for every scenario. 但是我们不能每一种场景下都这么做。 will/would (1)用于疑问句，表示请求、邀请 e.g. Will you come to my office after class (2)表示意愿 e.g. I will never let you ... ...
