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1、Unit 3Could you please clean your room?,Section A,do the dishes,sweep the floor,fold the clothes,What chores do you do everyday?,make the bed,do the laundry,take out the trash,1a Discuss with your partners about the chores you do at home.,1. do the dishes 2. sweep the floor 3. take out the rubbish 4
2、. make your bed 5. fold your clothes 6. clean the living room,1b Listen and check ()：what kind of chores do Mom and Peter do？,Peter, we need to clean the house. Your grandma is coming over at seven. Sure, but I need to do my first. OK. Then after you finish your homework, lets clean up the . I can d
3、o the and the floor. Could you please the rubbish? Sure, Mom. Good. And could you please make your bed and your clothes? All right. And lets see. I have to clean the living room before your grandma .,homework,kitchen,dishes,swept,take out,fold,arrives,How to make a request(要求)? Sweep the floor , Pet
4、er! Can you sweep the floor, Peter? Could you please sweep the floor?,Which is the most polite(礼貌) ?,A: Could you please ?,B: Yes I can,B: No, I cant. I have to(do my homework) Sorry, I cant. I have to,/Sure,certainly,No problem/,/All right/,注意：1. 提出委婉的请求在回答中不可用could。 A: Could I have the television
5、on? B: Yes, you can. / No, you cant.,1c Pairwork,A: Could you please sweep the floor? B: Yes, sure. Can you do the dishes? A: Well, could you please do them? I am going to clean the living room. B: No problem.,A: Could you please ?,B: Yes /Sure/All right/No problem,No/Sorry, I cant. I have to,2a Lis
6、tening and check “yes” or “no”.,2b Why does Peters father say “no”?,Hey, Dad? Yes? Could I go out for dinner with my friends tonight? Sure, that should be OK. Could I go to the movies after that? My friends said the new action movie is really good. I guess so. But dont stay out late.,Could I stay ou
7、t until eleven? We might get something to drink after the movie. No, you cant. You have a basketball game tomorrow, remember? You need to have a good rest. Oh, yeah. Well, could you give me a ride to town now? If I take the bus, Ill be late. I cant, Peter. I have to do some work now. Oh, OK. No prob
8、lem. Ill call Alan. Maybe his dad can give me a ride.,2c. Pairwork,A: Could I please use your computer? B: Sorry. Im going to work on it now. A: Well, could I watch TV? B: Yes, you can. But first you have to clean your room.,情态动词用法小结 1. 情态动词不能表示正在发生或已经发生的事情, 只表示期待或估计某事的发生。 2. 情态动词除ought 和have 外, 后面只
9、能接不带to 的不定式。,3. 情态动词没有人称,数的变化,即情态动词第三人称单数不加-s。 4. 情态动词没有非谓语形式,即没有不定式、分词等形式。,could与can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。,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。 e.g. Can you tell us your story ,Tony ? Tony,你能给我们讲讲你的故事吗？,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。比如： -Coul
10、d you tell us if it snows in winter in Australia? -Sure. -请告诉我们, 澳大利亚冬天下雪吗? -当然可以。,注意：1. 提出委婉的请求在回答中不可用could。 A: Could I have the television on? B: Yes, you can. / No, you cant. 2. 在否定、疑问句中表示推测或怀疑用couldnt。 He couldnt be a bad man. 他不大可能是坏人。,may和might 表示允许或请求; 表示没有把握的推测; may放在句首, 表示祝愿。 May God bless
11、you! He might be at home. 注意: might 表示推测时, 不表示时态，只是可能性比may小。,1. 两词都是 “必须”的意思, have to 表示客观的需要, must 表示 说话人主观上的看法, 既主观 上的必要。,have to和must,My brother was very ill, so I had to call the doctor in the middle of the night. 我弟弟病得很厉害,我只得半夜里 把医生请来。(客观上需要做这件事) He said that they must work hard. 他说他们必须努力工作。 (主
12、观上要做这件事),2. have to有人称、数、时态的变化,而must只有一种形式。但must 可用于间接引语中表示过去的必要或义务。 He had to look after his sister yesterday.,3. 在否定结构中: dont have to 表示 “不必”, mustnt 表示“禁止”。 You dont have to tell him about it. 你不一定要把此事告诉他。 You mustnt tell him about it.你一定不要把这件事告诉他。,用情态动词can/could, cant, may, must, mustnt , neednt
13、填空。 1. - _ you come and play with us now? - Im afraid I _. I _ do the cooking. I _ come later. 2. - _ we clean the windows today? - No, you _. You _ clean them tomorrow.,Could,cant,must,can,Must,neednt,can,3. - _ I watch TV this evening, mum? - No, you _. Work _ come first. 4. - _ I come in, please? -Yes, please. 5. Excuse me. _ you tell me the way to the cinema?,May,mustnt,must,Can,Can,
