人教版英语八年级下册Unit3知识点.doc

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1、Unit 3 Could you please clean your room? 本单元讨论的主题是“家务和许可”,其功能项目是“礼貌地请求”和“征求许可。要求学生学会用情态动词 could来礼貌地进行请求或者征求他人的许可。1、 观察例句，总结规律Could you please take out the rubbish?Could you please make your bed and fold your clothes?规律：都含有情态动词could+动词原形。2、 情态动词could的用法（一）、表示有礼貌地提出请求。(1)Could you please ? 请你做某事可以吗？ e

2、.g. Could you please take out the rubbish? 请你把垃圾倒掉好吗? Could you please not eat in class？ 课堂上你能不吃东西吗？(2)Could I please？常用于委婉地请求别人允许自己做某事，其后同样接动词原形。e.g. Could I please go camping with my friends next morning？明天早上我能和朋友们去野营吗？表示请求的问句的回答方式。（二）、could 表示请求时，其肯定回答和否定回答都不用could。肯定回答为：Yes，you can./Sure./Of cou

3、rse./Certainly./No problem./Id love to./Yes，please./Its OK./All right./ Yes, sure. /with pleasure. 否定回答为：Sorry，Im afraid not./Im sorry，you cant./Im sorry，but /Of course not. /Sorry, youd better not.e.g. Could you please do the dishes？请你洗洗盘子好吗？ Sorry，Im afraid not. I have to do my homework. 对不起，恐怕不行，

4、我得做作业。 Could I use your computer？我可以用你的电脑吗？ Certainly.当然可以。(三) 、could 为can的过去式。意为“能”，用于表示过去的能力等，其肯定回答和否定回答都用could。具体用法如下：e.g. Could you play basketball when you were 5 years old？ 当你5岁时，你会打篮球吗？ Yes，I could. / No，I couldnt.是的，我会。/不，我不会。三、总结情态动词could的用法1.表示有礼貌地提出请求,意思是请你做.可以吗？还可用于委婉地请求别人允许自己做某事，意思是我可以做

5、.吗？2.could 为can的过去式。意为“能”，用于表示过去的能力以及许可。四、总结本单元重点短语1. take out the rubbish 倒垃圾2. sweep the floor 擦地板3. make ones bed 整理床铺4. all the time 频繁;反复5. as soon as 一.就.6. in order to 目的是;为了7. depend on 依靠;信赖8. as a result 结果9. take care of 照顾;处理10. agree with 赞同;同意五、当堂检测1. -Could I borrow your camera? -_,bu

6、t you cant lend it to others.A. Im sorry B. Of course C. Let me see D.No, thanks2.-Could I look at your pictures? -Yes. of course. You_. A. could B. can C. will D. might3. -Could you please help me do my homework? -Sorry,I _.You should do it by yourself.A. Could B. couldn t C. cant D. cant4. -Could you please take out the rubbish? - _. But I want to drink a cup of water first. A. Thank you B. Sure, no problemC. Youre welcome D. No, I cant