九年级英语 Unit 13 Section A(4a-4c)（ppt课件）

1、Unit 13 We are trying to save the earth!,Section A Grammar Focus-4c,1,学习交流课件,Revision,不同种类的污染 2. 河底 3. 把垃圾扔到河里 4. 在中起作用,different kinds of pollution,the bottle of the river,throw rubbish into the river,play a part in,I. Check if you know these phrases.,2,学习交流课件,5. 在中国南部 6. 对有害 7. 在顶部 8. 海洋生态系统,in so

2、uthern China,be harmful to,at the top of,the oceans ecosystem,3,学习交流课件,II. Translate the sentences.,1. 甚至是河底都满是垃圾。 2. 这个方法不仅残酷还对环境有害。,Even the bottom of the river was full of rubbish.,This method is not only cruel, but also harmful to the environment.,4,学习交流课件,3. 鲨鱼处于海洋食物链的顶部。 4. 许多人相信鱼翅对健康有好处。,Shar

3、ks are at the top of the food chain in the oceans ecosystem.,A lot of people believe that sharks fins are good for health.,5,学习交流课件,take part in afford turn off reusable pay for take action transportation,参加 v. 买的起；承担的起（后果） 关掉 adj. 可重复使用的 付费；付出代价 采取行动 n. 运输业；交通运输,6,学习交流课件,辨析：join, join in 和take part

4、 in,to,7,学习交流课件,Will you join us in the discussion? 你参加我们的讨论吗？ She joined the Young Pioneers. 她加入了少先队。 Why didnt you join in the talk last night? 昨晚你为什么没参加座谈？ Did you take part in the sports meet? 你参加运动会了吗？,8,学习交流课件, afford是动词，意为“买得起,担负得起”，通常与can, could, be able to连用,多用于否定句中。 They couldnt afford $50

5、 for a ticket. 他们拿不出50美元买一张票。 afford后面常跟带to的动词不定式。 We cant afford to go abroad this summer. 今年夏天我们没有足够的钱出国。 例句：Miss Taylor never wastes money on anything too expensive, even though she can _to. She has donated much of the money she saved to charities. A. affordB. allow C. remind D. pay,afford,9,学习交流

6、课件,Pay attention to the sentences. 1. Were trying to save the earth. 2. The river used to be so clean. 3. The air is badly polluted. 4. No scientific studies have shown that shark fins are good for health. 5. We should help save the sharks.,Present progressive,used to,Passive voice,Present perfect,G

7、rammar Focus,Modal verbs,10,学习交流课件,现在进行时: Present Progressive,结构: be (am/is/are) + v.-ing 标志词：Look, Listen, now, right now e.g. Look! The boy is crying.,定义：表示说话时(瞬间)正在进行的动作, 也表示目前或现阶段正在进行的动作。,11,学习交流课件,used to do sth. 表示过去常常做某事, 而现 在往往不做了, 后接动词原 形。 be used to doing sth. 表示习惯于做某事 e.g. I used to get u

8、p at six oclock. Joe is used to drinking a cup of coffee every morning.,used to do与be used to doing,12,学习交流课件,Translation. 1. 她过去常常周末和朋友闲逛。 She used to hang out with friends on weekends. 2. 他习惯于每天晚上睡得很晚。 He is used to staying up.,Exercise,13,学习交流课件,被动语态：Passive voice,定义：表示主语是动作的承受者，即行 为动作的对象的一种语态。 结

9、构：be + 过去分词 e.g. A new school was built last year. Our classroom is cleaned every day.,14,学习交流课件,Translate the sentences by using Passive voice. 1. 刚才一些老年人参观了博物馆。 2. 工人们使用不同种类的机器工作。,The museum was visited by some old people just now.,Different kinds of machines are used to work by the workers.,Exerc

10、ise,15,学习交流课件,结构: has/have + 过去分词 标志词：already, yet, ever, never, since, for e.g. I havent finished my homework yet.,定义：表示动作已经完成, 但对现在造成影 响; 或者表示从过去某一时间开始一 直延续到现在并还可能持续下去的 动作。,现在完成时: Present Perfect,16,学习交流课件,Complete the following sentences. I _ (be) in Beijing for two years. 2. I _ never _ (hear) o

11、f that man before. 3. Tom _ (work) there since two years ago.,have been,have,heard,has worked,Exercise,17,学习交流课件,4. The twins _ (wash) the clothes for an hour. 5. He _ (play) basketball since three years ago. 6. How long _ Sally _ (sing) yet?,have washed,has played,has,sung,18,学习交流课件,1. 情态动词本身有一定的词义

12、, 表示说话人的情绪、态度或语气, 但不能单独作谓语, 只能与其他动词构成谓语。常见的有: can (could), may (might), must, need, shall (should), will (would)等。,情态动词,19,学习交流课件,2. 情态动词无人称和数的变化, 后接动词原形。否定式是在情态动词后面加not。个别情态动词有过去式形式, 可用来表达更加客气、委婉的语气。 e.g. Ken can climb up the tress like a koala. Tracy could ride a bicycle when she was five years ol

13、d. You mustnt play with fire. It is dangerous.,20,学习交流课件,Translation. 1. 我们不能在教室里吃东西。 2. 首先你必须完成作业。 3. 他现在不可能在家。 4. 她一定知道这个问题的答案。,Exercise,We cant eat in the classroom.,You must finish your homework first.,He cant be at home now.,She must know the answer to this question.,21,学习交流课件,4a,Fill in the bl

14、anks with the correct forms of the verbs in brackets.,Joe: _ you ever _ (take) part in an environmental project ? Eric: Yes, I have. I _ (help) with a Clean-Up Day last year. It was _ (consider) the biggest clean-up project this city _ ever _ (have).,Have,taken,helped,considered,had,had,参加,22,学习交流课件

15、,Joe: How many people _ (take) part? Eric: I _ (think) more than 1,000 people _ (come) to help out. Joe: Thats fantastic! I guess everyone in this city is _ (try) to improve the environment. Eric: Yes, we cant afford to _ (wait) any longer to take action!,took,think,came,trying,wait,v. 承担得起(后果); 买得起

16、,23,学习交流课件,4b,Fill in the blanks with the appropriate modal verbs from the box.,People _ think that big things _ be done to save the earth. Many forget that saving the earth begins with small things. For example, you _ save,may/might,must,can,can would could have to should must may/ might,24,学习交流课件,

17、electricity by turning off the lights when you leave a room. You _ also use reusable bags instead of plastic bags. I think its a great idea that you now _ pay for plastic bags in some stores. And instead of driving to school or work, you _ ride your bike or walk. If its far, you _ take the bus. All

18、these,could,have to,can/should,can/could,关掉,adj.可重复使用的,付费;付出代价,25,学习交流课件,small things _ add up and become big things that _ improve the environment. Lets take action now!,could,would/can,采取行动,26,学习交流课件,Make a list of things that people can do to help the environment and discuss your list with your p

19、artner.,4c,27,学习交流课件,Discussing.,28,学习交流课件,29,学习交流课件,30,学习交流课件,31,学习交流课件,32,学习交流课件,33,学习交流课件,练习题,34,学习交流课件,情态动词练习,1.- _ you pass me a pen? Id like to write down the phone number. - Sure. Here it is. A.Can B.Need C.Might D.Must 2. - May I go to the cinema, Mum? - Certainly, but you _ be back by 11 oc

20、lock. A.can B.may C.must D. need 3. You _ worry about me. Its nothing serious. A.cant B.mustnt C. neednt D. wont,35,学习交流课件,4. - Excuse me. Is this the right way to the Summer Palace? - Sorry, Im not sure. But it _ be. A. might B. mustnt C.cant D.must 5. The man in the office _ be Mr.Black, because h

21、e went home just now. A.musnt B.may not C.cant D.neednt,36,学习交流课件,use to 练习,A 她过去常常周末和朋友闲逛。 She _ with friends on weekends. B 他习惯于每晚睡得很晚。 He _ at night. C. Ken used to be afraid of dogs.(改为一般疑问句) _?,used to hang out,is used to sleeping late/ staying up,Did Ken use to be afraid of dogs,37,学习交流课件,1. H

22、e promised to pick me up at the school gate. However, he _ yet. A. didnt arrive B. doesnt arrive C. isnt arriving D. hasnt arrived 2. Ba Jin, one of the greatest writers in China, _ as “Peoples Writer”. A. is regarded B. has regarded C. is regarding D. regards,Choose the best answer.,38,学习交流课件,3. Wh

23、ere is Tom? He _ in his room. A. is readingB. reads C. readD. was reading 4. May I go out now, Dad? No. You _ let your mother know first. A. can B. may C. need D. must,39,学习交流课件,5. Her son _ coke, but now he _ milk. A. used to drink ; is used to drinking B. used to drinking ; drinks C. is used to drinking ; used to drink D. is used to drink ; is drinking,40,学习交流课件,1. (2013江苏淮安) Its getting dark. Please _ the light. A. turn on B. turn off C. turn down D. turn around 2. (2013湖北随州)How does Jack usually go to work? He _ drive a car, but now he _ there to lose weight. A. used to; is