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课件网) Unit 3 Could you please clean your room Grammar focus-4c Could I stay out late Could I use the car Sorry, you can’t. I have to go to a meeting. Could I get a ride No, you have a test tomorrow. Yes, you can. Grammar Could you please clean your room Yes, sure. Could you please do the dishes Sorry, I can’t. I have to do my homework. Could I go to the movies Yes, you can. Could I use the car No, you can’t. I have to go out. could can 的过去时 礼貌的请求 提出建议 推测 I could run fast when I was a child. Could you help me You could talk to your teacher now. He couldn’t be at the school then. Grammar focus Could I go out for dinner with my friends Sure, that should be OK. Could we get something to drink after the movie No, you can't. You have a basketball game tomorrow. Could you please take the dog for a walk OK, but I want to watch one show first. Could you please take out the rubbish Yes, sure. Can you find the common features of these sentences 出去吃晚饭 喝点东西 遛狗 倒垃圾 语法讲析 句型: ① 肯定: Could you (please) + 动词原形 ② 否定: Could you (please) not + 动词原形 Could表委婉请求的用法 肯定回答：Yes, I can. / Yes, sure. / All right / Certainly /I’d love to./ No problem / With pleasure / I’d be glad to. 否定回答：Sorry, I can't. I have to do my homework./ I'm afraid I can't. I am doing my homework. I'd love to, but I'm going to school. 语法讲析 Could表请求许可的用法 句型: ① Could I + 动词原形 我可以/能……吗？ ② Could we + 动词原形 我们可以/能……吗？ 肯定回答: Yes, you can. /Yes, please. / Yes, sure. 否定回答: No, you can't. / Sorry, you can't. / I'm afraid you can't. / You’d better not. 观察与思考 读以下四个句子，总结出could的用法。 could He couldn't be at the school then. 他那时不可能在学校。 You could talk to your teacher now.现在你可以 和老师谈一谈。 Could you help me 你能帮帮我吗？ I could run fast when I was a child. 我小时候可以跑得很快。 can 的过去时，表示能力，意为“能够，会”。 表示有礼貌的请求， 意为：“可以…吗？” 委婉地向别人提出建议，意为“可以做…。” 表推测，但把握不大。意为“可能”。 语法讲析 Could 和 can表请求的区别 could与can都是情态动词，could是can的过去式。二者都可用于表示请求, 但是用法稍有不同: 1. could表示有礼貌的请求，语气委婉，常用于非熟人之间 或晚辈对长辈、下级对上级的场合。 - Could you tell us if it snows in winter in Australia - Sure. 2. can表示一般性的请求，语气随便，常用于熟 人之间或长辈对晚辈、上级对下级的场合； - Can you tell us your story, Tony - Of course. 语法讲析 常见表示委婉请求的句型 ① Could you please + do sth. ② Could you + do sth. ③ Would you please + do sth. ④ Would you + do sth. ⑤ Would you mind + doing sth. 你介意……吗？ ⑥ Would you like + to do sth. 你愿意...吗 ⑦ What about doing sth. ......怎么样？ 语法讲析 常见表示请求允许的句型 ① May I + do sth. ② Can I + do sth. ③ Could I + do sth. ④ Might I + do sth. ⑤ Do you mind if I + do sth. 表示给予允许,只能用can/may, 不能用 could 或 might。e.g. A: Could I use your pe ... ...
