英语九年级全册Unit13SectionAgrammarfocus教学课件-人教新目标版.ppt-(课件无音视频)

1、1.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 bottom of the riverthrow rubbish into the riverplay a part inI.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 at the top ofthe oceans ecosystemII.Translation.1.

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。This method is not only cruel,but also harmful to the environment.2.鲨鱼处于海洋食物链的顶部。鲨鱼处于海洋食物链的顶部。3.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。Sharks are at the top of the food chain in the oceans ecosystem.A lot of people believe that sharks fins are good for health.Pay attention to the

3、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 progressiveused toPassive voicePresent perfectModal verbs现在进行时现在进行时:Present progressiv

4、e结构结构:be(am/is/are)+v.-ing标志词：标志词：Look,Listen,now,right now,these days,this month e.g.Look!The boy is crying.Mr.Green is writing a book these days.定义：定义：表示说话时表示说话时(瞬间瞬间)正在进行的动作正在进行的动作,也表示目前也表示目前或现阶段正在进行的动作。或现阶段正在进行的动作。What a fine day today!Look!What are they doing?used to do sth.表示过去常常做某事表示过去常常做某事,而

5、现在往往不做了而现在往往不做了,后后 接动词原形。接动词原形。be used to doing sth.表示表示习惯于做某事习惯于做某事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 doing1.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 friends on weekends.2.他习惯晚睡。他习惯晚睡。He is used to staying up.被动

6、语态：被动语态：Passive voice定义：定义：表示主语是动作的承受者，即行为动作的对象的表示主语是动作的承受者，即行为动作的对象的 一种语态。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 visite

7、d 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,for e.g.I havent finished my homework yet.定义：定义：表示动作已经完成表示动作已经完成,但对现在造成影响但对现在造成影响;或者表示或者表示从过去某一时间开始一直延续到现在并还可能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。持续下去的动作。现在完成时

8、现在完成时:Present perfectComplete the following sentences.1.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 worked4.The twins _(wash)the clothes for an hour.5.He _(play)basketball since three years ago.6.How long _ Sally

9、 _(sing)yet?have washedhas playedhassung1.情态动词本身有一定的词义情态动词本身有一定的词义,表示说话人的情绪、态度或语气表示说话人的情绪、态度或语气,但但不能单独作谓语不能单独作谓语,只能与其他动词构成谓语。只能与其他动词构成谓语。常见的有常见的有:can(could),may(might),must,need,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,后接动词原形。否定式是在情态动后接动词原形。否定式是在情态动词后面加词后面加not。个别情态动词有过去式形式。个别情

10、态动词有过去式形式,可用来表达更加客气、可用来表达更加客气、委婉的语气。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 fire.It is dangerous.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 cl

11、assroom.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 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 _(con

12、sider)the biggest clean-up project this city _ ever _(have).Have takenhelpedconsideredhadhad 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 _(wai

13、t)any longer to take action!tookthinkcametryingwait4bFill 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.may/mightmust/have to can would could have to should must may/mi

14、ght For example,you _ save electricity by turning off the lights when you leave a room.You _ also use reusable bags instead of plastic bags.can/could/shouldcould/can/shouldI 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

15、your bike or walk.If its far,you _ take the bus.have to can/should/couldcan/could All these small things _ add up and become big things that _ improve the environment.Lets take action now!can/couldwould/can/could4cMake a list of things that people can do to help the environment and discuss your list

16、 with your partner.use public use public transportation(n.transportation(n.交通运输交通运输););turn off the lights when you leave a room;use reusable bags instead of plastic bags;ride your bike or walk to school or work;stop using paper napkins(n.餐巾纸餐巾纸);recycle books and paperI think that everyone should u

17、se public transportation.I disagree.Its difficult for parents with young children to use public transportation1.We cant afford to wait any longer to take action!afford v.承担得起承担得起;买得起；提供买得起；提供,给予给予 常与常与can,be able to连用连用 afford sth.买得起买得起/承受得起某物承受得起某物 afford to do sth.有能力做某事有能力做某事/负担得起做某事负担得起做某事e.g.C

18、an you afford the mobile phone?We cant afford to pay such a price.afford&buyafford侧重侧重“有经济能力买有经济能力买”，而，而buy则侧重则侧重“购买购买(这一行为这一行为)”。表示表示“我买不起我买不起”可以说可以说I cant afford.，但不能说，但不能说I cant buy.。根据句意，用根据句意，用afford或或buy的适当形式填空。的适当形式填空。1)They cant _ to send their children to college.2)Can you _ a new car?3)Hel

19、en _ some fruit on her way home yesterday.affordaffordbuy2.save electricity by turning off the lights when you leave a room.turn off 关掉关掉 e.g.Please turn the television off before you go to bed.睡觉前请关掉电视。睡觉前请关掉电视。turn on 打开打开,发动发动 turn around 转身转身 turn up 调高调高(音量音量)turn down 调低调低;拒绝拒绝turn into 变成变成;进

20、入进入 turn over 移交移交拓展拓展:turn相关短语相关短语根据短文内容及括号内所给根据短文内容及括号内所给(短语短语)动词的提示，用正确的时态或语动词的提示，用正确的时态或语态补全短文，使短文完整、通顺。态补全短文，使短文完整、通顺。The clockwork radio(发条式收音机发条式收音机)is the only radio that doesnt need batteries(电池电池)or electricity.It is powered by turning the handle(手柄手柄)for a minute.Nowadays,thousands of the

21、se radios(1)_(make)every day.The clockwork radio(2)_(invent)in 1991 by Trevor Bayliss,a British inventor.Trevor had the idea while he(3)_(listen to)some news on the radio aboutare made was listening towas invented Africa.It(4)_(report)that Africans were dying of Aids and there was no easy way to sen

22、d them information about the disease.But no one would help Trevor develop his idea for a new kind of radio.Finally,in 1993,his invention(5)_(show)on a TV program,and afterwards,a South African businessman(6)_(hear of)Trevors clever idea and contacted(联系联系)was shown was reportedheard ofhim.The first

23、Freeplay radios(7)_(build)in South Africa in 1995.Since then,the radios(8)_(be)a great success.Trevor has been given many prizes,including one from Nelson Mandela.Trevor(9)_(hang)a letter on the wall in his house.It(10)_(write)in 1991 by another engineer,who explained why he thought Trevors idea for a clockwork radio couldnt possibly work!was writtenwere built have been has hungFinish the exercises in the workbook.