新人教版八年级英语下学期uint_3_Could_you_please_clean_your_room_SectionA2

1、Unit 3 Could you please clean your room?,Section A Grammar Focus,Grammar Focus,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

2、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： -Could 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?

3、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 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 broth

4、er 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”,

5、 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。,4a. Write R for requests and P for permissions. Then match each one with the correct response.,_ Could I hang out with my friends after the movie? 2. _Could you please pass me the salt? 3._Cou

6、ld I borrow that book? 4._Could you help me do the dishes? 5._Could you lend me some money?,P,R,P,R,R,Yes, here you are. Hmm. How much do you need? Yes, sure. No problem. I finished reading it last night. d. Yes, but dont come back too late. e. No, I cant I cut my finger and Im trying not to get it

7、wet.,1d 2-a 3-c 4-e 5-b,4b Fill in the blanks in the conversation,A: I hate to_ chores. B: Well, I hate some chores too, but I like other chores. A: Really? Great! _I ask you to_ me with some chores then? B: What do you need help with ? A: _ you please _my clothes for me? B: I dont want to do that!

8、Its boring!,Could,do,help,Could,fold,A: OK. Then_ you _do the dishes for me? B: Sure, no problem. But_ we go to the movies after that? A: Sure, Ill finish my homework while you help me with the dishes. Then we can go to the movies.,could,please,could,4c Make a list of things your group needs to do f

9、or a camping trip. Then discuss who will do bring a tent them and complete the chart.,A: Could you please bring Liu Chang? B: Sure. And could you please ? C: Sorry, I cant. I have to,Pair work,用情态动词can/could, cant, may, must, mustnt , neednt填空。 1. - _ you come and play with us now? - Im afraid I _.

10、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,A: Could you help me, please? B: _! A: I want to _these boxes to my home Lets _ the boxes _ the car now. B: _right. A: Oh, the box _ heavy. Can you carry it? B: Yes, I_ A: _you _ it to my room? B: Certainly.,完成对话,Certainly,take,put,in,All,is,can,Could,tak