Unit 7 Grammar课件2022-2023学年牛津译林版七年级下册英语

Unit 7 Abilities Grammar Lead-in She can skate very well now. She could skate just a little when she was six years old. He couldn’t swim when he was a baby. He can swim very well now. Part A Using can, could and may We use can or could to talk about ability. (can表示现在的能力，could表示过去的能力) e.g. Millie can speak good English. The old man could swim across the Yangtze River. We use can to talk about present ability. We use could to talk about ability in the past. 1. 肯定句：主语+can/could+动词原形+其他 e.g. I can play basketball now. She could dance at the age of six. 2. 否定句：主语+can’t/couldn’t+动词原形+其他 e.g. I can’t play basketball now. She couldn’t dance at the age of six. can的否定形式为cannot或can’t could的否定形式为could not或couldn’t 3. 一般疑问句： Can/Could+主语+动词原形+其他? 肯定回答: Yes, 主语+can/could. 否定回答: No, 主语+can’t/couldn’t. e.g. ---Can you ​play basketball now? ---Yes, I can./No, I can’t. ---Could she dance at the age of six? ---Yes, she could./No, she couldn’t. We can also use be able to to talk about ability. 我们也可以用be able to来表示能力，be动词的形式根据句子所用时态变化。 e.g. I am able to play basketball now. She was able to dance at the age of six. We use can, could or may to ask for permission. Could sounds more polite than can. May is formal. (could表示的语气比can更有礼貌， may较正式) e.g. ---Can I borrow your bike, Millie? ---Yes, you can. Here you are. ---Could I smoke here? ---Sorry, I’m afraid you can’t. ---May I use your mobile phone? ---Of course you may. 1. 用can, could, may表示请求时，肯定回答用can或may，但否定回答只能用can’t，不能用could回答。 2. can’t可以用来表示①现在不具备的能力，“不能，不会” ②表示不同意，“不可以，不能” ③表示推测，“不可能” e.g. ---Can you swim? ---No, I can’t. ---Could I smoke here, madam? ---Sorry, I’m afraid you can’t. ---I saw Jack in the park just now. ---That can’t be him. He is sleeping at home. The students