Unit 3 Grammar Focus-2020-2021学年八年级下册初二英语同步教学课件（人教版）

Unit 3 Grammar Focus 授课人：XXXX * 一、新课引入 You want the door opened. You want to use the computer. Could I _______ _________ ? Could you please _______ _____? use the computer open the door 二、新课讲解 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. 情态动词could Could 用于礼貌地向对方提出要求或请求。 也可用于提出建议，比can语气委婉。 1. Could you（please）+ V-原形？ 表示委婉地提出请求 例如：1) -Could you please clean your room? - Yes, sure./ Of course./ Certainly./All right. 2). -Could you please do the dishes? -Sorry, I can’t. I have to do my homework. 二、新课讲解 2. Could I/ we + V-原形？ 表示向别人征询许可。 如：—Could I go out tonight, Mom? —Yes, you can. / No, you can’t. 二、新课讲解 请求及答语 在表示请求帮助或请求允许的疑问句中，常用could代替can，表示礼貌，委婉或不确定，而can则不具备这些语气。用could是为了表示礼貌的请求。 表示请求帮助或请求允许时，除了can, could之外，还可以用may，可以用不同的方式来表示同一个概念。例如： ① Could/Can/May I use your car for a day? ② I wonder if I could use your car for a day? 同意可说Yes或Sure或Certainly，Yes, (do) please. 或Of course, (you may/can). 或Go ahead, please. 或That’s OK/all right; 不同意，可以说I’m sorry you can’t. 或I’m really sorry, but I have to use it today. 要避免说No, you can’t. 这样很不礼貌。否定回答通常用委婉语气。 二、新课讲解 请求及答语 ③ Do you mind if I use your car for a day? Never mind. /Not at all. 表“不介意”。不能用Yes. /Sure. /Of course. /Certainly.等。 无论肯定还是否定应答中，要避免使用could，要用can或may。因为应答须用确定的语气。而could在表请求的问句中是为了表示礼貌或委婉语气，用在应答中则成了不确定语气，与情理不符。所以应答中不说Yes, you could. 或No, you couldn’t. 而要说Yes, you can. 或Sorry. /No, you can’t. 二、新课讲解 请求及答语 其他请求句型及回答： Would you like + sth. / to do sth.? May I + do sth.? Shall we + do sth.? Would you mind + sth. /doing sth.? What / How about + sth. /doing sth.? 肯定回答有Sure. /Of course. / Certainly. /OK. /Great. / Well. / Good idea. / I agree. 等。否定回答有Sorry… / No, you can’t