九年级英语 Unit 13 Section A(4a-4c)

1、.Unit 13We are trying to save the earth! . 不同种类的污染不同种类的污染2. 河底河底3. 把垃圾扔到河里把垃圾扔到河里4. 在在中起作用中起作用different kinds of pollutionthe bottle of the riverthrow rubbish into the riverplay a part in I. Check if you know these phrases.5. 在中国南部在中国南部6. 对对有害有害7. 在在顶部顶部8. 海洋生态系统海洋生态系统in southern Chinabe harmful to

2、at the top ofthe oceans ecosystem.II. Translate the sentences.1. 甚至是河底都满是垃圾。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。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.3. 鲨鱼处于海洋食物链的顶部。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。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.take part inaffordturn offreusablepay fortake actiontransportation参加参加v. 买的起；承担的起买的起；承担的起（后果）（后果）关掉关掉adj. 可重复使用的可重复使用的付费；付出代价付费；付出代价采取行动采取行动n. 运输业；交通运输运输业；交通运输Words Review.辨析：辨析：j

4、oin, join in 和和take part in to.Will you join us in the discussion? 你参加我们的讨论吗？你参加我们的讨论吗？ She joined the Young Pioneers. 她加入了少先队。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？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？你参加运动会了吗？. afford是动词，是动词，意为意为“买得起买得起,担负得起担负得起”，通通常

5、与常与can, could, be able to连用连用,多多用于否定句中。用于否定句中。They couldnt afford $50 for a ticket. 他们拿不他们拿不出出50美元买一张票。美元买一张票。 afford后面常跟带后面常跟带to的动词不定式。的动词不定式。We cant afford to go abroad this summer. 今年今年夏天我们没有足够的钱出国。夏天我们没有足够的钱出国。例句：例句：Miss Taylor never wastes money on anything too expensive, even though she can _t

6、o. She has donated much of the money she saved to charities. A. affordB. allow C. remind D. payafford.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.

7、5. We should help save the sharks.Present progressiveused toPassive voicePresent perfectModal verbs.现在进行时现在进行时: : Present Progressive结构结构: be (am/is/are) + v.-ing标志词：标志词：Look, Listen, now, right nowe.g. Look! The boy is crying.定义：表示说话时定义：表示说话时(瞬间瞬间)正在进行正在进行的动作的动作, 也表示目前或现阶段也表示目前或现阶段正在进行的动作。正在进行的动作。

8、.used to do sth. 表示过去常常做某事表示过去常常做某事, 而而现现 在往往不做了在往往不做了, 后接动词原后接动词原 形。形。be used to doing sth. 表示习惯于做某事表示习惯于做某事e.g. I used to get up at six oclock. Joe is used to drinking a cup of coffee every morning.used to do与与be used to doing.Translation.1. 她过去常常周末和朋友闲逛。她过去常常周末和朋友闲逛。 She used to hang out with fri

9、ends on weekends.2. 他习惯于每天晚上睡得很晚。他习惯于每天晚上睡得很晚。 He is used to staying up.被动语态：被动语态：Passive voice定义：定义：表示主语是动作的承受者，即行表示主语是动作的承受者，即行 为动作的对象的一种语态。为动作的对象的一种语态。结构：结构：be + 过去分词过去分词e.g. A new school was built last year. Our classroom is cleaned every day.Translate the sentences by using Passive voice.1. 刚才一

10、些老年人参观了博物馆。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。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. .结构结构: has/have + 过去分词过去分词标志词：标志词：already, yet, ever, never, since, fore.g. I havent finished my homework yet.定义：表示动作已经完成定义：表示动作已

11、经完成, 但对现在造成影但对现在造成影 响响; 或者表示从过去某一时间开始一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直延续到现在并还可能持续下去的 动作。动作。 现在完成时现在完成时: Present Perfect.Complete the following sentences. I _ (be) in Beijing for two years.2. I _ never _ (hear) of that man before.3. Tom _ (work) there since two years ago.have beenhaveheard has worked.

12、4. The twins _ (wash) the clothes for an hour.5. He _ (play) basketball since three years ago.6. How long _ Sally _ (sing) yet?have washedhas playedhassung.1. 情态动词本身有一定的词义情态动词本身有一定的词义, 表示说话表示说话人的情绪、态度或语气人的情绪、态度或语气, 但不能单独作但不能单独作谓语谓语, 只能与其他动词构成谓语。只能与其他动词构成谓语。常见常见的有的有: can (could), may (might), must, n

13、eed, shall (should), will (would)等。等。情态动词情态动词.2. 情态动词无人称和数的变化情态动词无人称和数的变化, 后接动词后接动词原形。否定式是在情态动词后面加原形。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。个别情态动词有过去式形式, 可用来可用来表达更加客气、委婉的语气。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 old. You mustnt play with

14、fire. It is dangerous.Translation.1. 我们不能在教室里吃东西。我们不能在教室里吃东西。2. 首先你必须完成作业。首先你必须完成作业。3. 他现在不可能在家。他现在不可能在家。4. 她一定知道这个问题的答案。她一定知道这个问题的答案。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.4aFill in the blanks with the cor

15、rect 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 takenhelpedconsideredhadhad参加参加.Joe: How many people _ (take) pa

16、rt?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!tookthinkcametryingwaitv. 承担得起承担得起( (后果后果) ); 买得起买得起.4bFill in the blanks with th

17、e appropriatemodal 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 _ savemay/mightmustcancan would couldhave to should mustmay/ might.electricity by turning off the lights when you leave a room

18、. 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 these couldhave to can/shouldcan/could关掉关掉adj.可重复使用的可重复使用的付

19、费付费;付出代价付出代价.small things _ add up and become big things that _ improve the environment. Lets take action now!couldwould/can采取行动采取行动. Make a list of things that people can do to help the environment and discuss your list with your partner.4 4c c. Discussing.练习题练习题.情态动词练习情态动词练习1.- _ you pass me a pen

20、? Id like to write down the phone number. - Sure. Here it is. A.Can B.Need C.Might D.Must2. - May I go to the cinema, Mum? - Certainly, but you _ be back by 11 oclock. A.can B.may C.must D. need3. You _ worry about me. Its nothing serious. A.cant B.mustnt C. neednt D. wont.4. - Excuse me. Is this th

21、e right way to the Summer Palace? - Sorry, Im not sure. But it _ be. A. might B. mustnt C.cant D.must5. The man in the office _ be Mr.Black, because he went home just now. A.musnt B.may not C.cant D.neednt.use to 练习练习A 她过去常常周末和朋友闲逛。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。他习惯于每晚睡得很晚。

22、 He _ at night.C. Ken used to be afraid of dogs.(改为一般疑问改为一般疑问句句)_?used to hang outis used to sleeping late/ staying upDid Ken use to be afraid of dogs.1. He promised to pick me up at the school gate. However, he _ yet. A. didnt arrive B. doesnt arrive C. isnt arriving D. hasnt arrived2. Ba Jin, one

23、of the greatest writers in China, _ as “Peoples Writer”. A. is regarded B. has regarded C. is regarding D. regardsChoose the best answer.3. Where is Tom? He _ in his room. A. is readingB. readsC. readD. was reading 4. May I go out now, Dad? No. You _ let your mother know first. A. can B. may C. need

24、 D. must.5. Her son _ coke, but now he _ milk.A. used to drink ; is used to drinking B. used to drinking ; drinksC. is used to drinking ; used to drink D. is used to drink ; is drinking.1. (2013江苏淮安江苏淮安) Its getting dark. Please _ the light. A. turn on B. turn off C. turn down D. turn around2. (2013湖北随州湖北随州)How does Jack usually go to work?He _ drive a car, but now he _ there to lose weight.A. used to; is used to walk B