八年級英語下冊 Unit 3 Could you please clean your room Section A 2課件 （新版）人教新目標(biāo)版.ppt

1、,Go,for,it!,Unit 3 Could you please clean your room?,Section A Grammar Focus,enjoy dinner with my family.,A: Mum, could I go out for dinner with my friends? B: Sure, that should be OK.,A: Could I get something to drink with my friends after the movie? B: Sure, you can.,A: Could I get something to dr

2、ink with my friends after the movie? B: No, you cant, you have a basketball game tomorrow.,take the dog for a walk,遛狗,A: Can you please take the dog for a walk? B: OK, but I want to watch one show first.,take out the rubbish,扔垃圾,A: Can you please take out the rubbish? B: Yes, sure.,Grammar Focus,情態(tài)動

3、詞用法,只作情態(tài)動詞的 can / could, may / might, ought to, must 可情態(tài)可實義的 need, dare 可情態(tài)可助動詞的 shall / should, will / would 相當(dāng)于情態(tài)動詞的 have to, used to,情態(tài)動詞的語法特征,1) 情態(tài)動詞不能單獨做謂語, 除ought和have外, 后面只能接不帶to的不定式。,2) 情態(tài)動詞沒有人稱, 數(shù)的變化, 但有些情態(tài)動詞, 如can、will也有一般式和過去式的變化。,3)情態(tài)動詞的“時態(tài)”形式并不是時間區(qū)別的主要標(biāo)志, 不少情況下, 情態(tài)動詞的現(xiàn)在式形式和過去式形式都可用來表示現(xiàn)在

4、時間、過去時間和將來時間。,1) can的主要用法是： A. 表示體力或腦力的能力： e.g. The girl can dance very well. B. 表示說話的推測事物的可能性等: e.g. Can the news be true? C. 在口語中, can可以表示請求或允許: e.g. Can I sit here?,can 和could：,can表示“能夠”時與短語be able to同義，但can只用于一般現(xiàn)在時或過去時，而后者可用于各種時態(tài)。另外，can表示個人有某種能力，而be able to表示某人通過努力、克服困難做成某事，相當(dāng)于succeed in doing s

5、th.；敘述過去事實時，最好用was / were able to，因為could只表示過去具有某種能力。,如： Can you understand the different kinds of English these people are using? Two years later, he was able to speak very good Chinese.,2) could的主要用法是： A. could 是can的過去式, 表示與過去 有關(guān)的能力和推測: e.g. We all knew that the young man couldnt be a doctor. B. c

6、ould可以代替can表示請求, 但語氣較can客氣、委婉:,e.g. Could you lend me your dictionary? Could I use your bike? 3) can和could接動詞的完成形式，表示可能已經(jīng)做某事。can用在否定和疑問句中, 表示不相信、懷疑等態(tài)度。 e.g. They cant have gone out because the light is still on.,以could或would提問時，不能再以could或would作答，而應(yīng)該用can或will。如： Could I borrow your dictionary? Yes, o

7、f course you can.,情態(tài)動詞用法小結(jié) 1. 情態(tài)動詞不能表示正在發(fā)生或已經(jīng)發(fā)生的事情, 只表示期待或估計某事的發(fā)生。 2. 情態(tài)動詞除ought 和have 外, 后面只能接不帶to 的不定式。,3. 情態(tài)動詞沒有人稱，數(shù)的變化，即情態(tài)動詞第三人稱單數(shù)不加-s。 4. 情態(tài)動詞沒有非謂語形式，即沒有不定式、分詞等形式。,could與can的區(qū)別 could與can都是情態(tài)動詞, could是can的過去式。二者都可用于表示請求, 但是用法稍有不同。,can 表示一般性的請求，語氣隨便, 常用于 熟人之間或長輩對晚輩, 上級對下級的 場合。 e.g. Can you tell u

8、s your story, Tony ? Tony，你能給我們講講你的故事嗎？,could表示有禮貌的請求，語氣委婉， 常用于非熟人之間或晚輩對長輩，下級 對上級的場合。比如： -Could you tell us if it snows in winter in Australia? -Sure. -請告訴我們, 澳大利亞冬天下雪嗎? -當(dāng)然可以。,注意：1. 提出委婉的請求在回答中不可用could。 A: Could I have the television on? B: Yes, you can. / No, you cant. 2. 在否定、疑問句中表示推測或懷疑用couldnt。

9、He couldnt be a bad man. 他不大可能是壞人。,may和might 表示允許或請求; 表示沒有把握的推測; may放在句首, 表示祝愿。 May God bless you! He might be at home. 注意: might 表示推測時, 不表示時態(tài)，只是可能性比may小。,1. 兩詞都是 “必須”的意思, have to 表示客觀的需要, must 表示 說話人主觀上的看法, 既主觀 上的必要。,have to和must,My brother was very ill, so I had to call the doctor in the middle of

10、 the night. 我弟弟病得很厲害，我只得半夜里 把醫(yī)生請來。(客觀上需要做這件事) He said that they must work hard. 他說他們必須努力工作。 (主觀上要做這件事),2. have to 有人稱、數(shù)、時態(tài)的變化,而must只有一種形式。但must 可用于間接引語中表示過去的必要或義務(wù)。 He had to look after his sister yesterday.,3. 在否定結(jié)構(gòu)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

11、訴他。 You mustnt tell him about it.你一定不要把這件事告訴他。,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._Could I borrow that book? 4._Could you help me do the dishes? 5.

12、_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 wet.,1d 2-a 3-c 4-e 5-b,4b Fill in the blanks in the conversa

13、tion,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! Its boring!,Could,do,help,Could,fold,A: OK. Then_ you _do the

14、 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 for a camping trip. Then discuss who will do bring a tent them

15、 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,用情態(tài)動詞can/could, cant, may, must, mustnt , neednt填空。 1. - _ you come and play with us now? - Im afraid I _. I _ do the cooking. I _ come later. 2. - _ we clean the windo

16、ws 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.,完成對話,Certainly,take,put,in,All,is,can,Could,take,can; could When I was young I _ climb any t