【公開課課件】Unit+13+Were+trying+to+save+the+earth++Section+A+4a-4c（共37張PPT）1

1、 Period 3 4a-4cGrammar focusSectionAUnit 13 Were trying to save the earth.Revision不同種類的污染2. 河底3. 把垃圾扔到河里4. 在中起作用different kinds of pollutionthe bottle of the riverthrow rubbish into the riverplay a part in I. Check if you know these phrases.5. 在中國南部6. 對有害7. 在頂部8. 海洋生態(tài)系統(tǒng)in southern Chinabe harmful to

2、 at the top ofthe oceans ecosystemII. Translate the sentences.1. 甚至是河底都滿是垃圾。2. 這個方法不僅殘酷還對環(huán)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. 鯊魚處于海洋食物鏈的頂部。4. 許多人相信魚翅對健康有好處。Sharks are at the top of the food chain in the oceans eco

3、system.A lot of people believe that sharks fins are good for health.We are try to save the earth.Present progressiveThe river used to be so clean.used to The air is badly polluted.Passive voiceNo scientific studies have shown that sharks fins are good for health.Present perfectWe should save the sha

4、rks.Model verbsGrammar FocusPay 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 progressiveused toPassive voiceP

5、resent perfectGrammar FocusModal verbs現(xiàn)在進行時（1）含義：表示正在發(fā)生或進行的動作。（2）基本結(jié)構(gòu)：主語 + be + 現(xiàn)在分詞（be 的形式隨主語的變化而變化）（3）基本用法：表示現(xiàn)在正在進行的動作。特征：常常與now或具體的時間連用，有時句中會有感官動詞來提示，或通過上下文來暗示。表示現(xiàn)階段一直進行的動作。這類動詞常常是延續(xù)性動詞。常于at present, this week, these days等連用。表示主語的特征、性格、能力等本單元復(fù)習現(xiàn)在進行時、used to句型、被動語態(tài)、現(xiàn)在完成時和情態(tài)動詞。What a fine day today

6、! Look! What are they doing?Exercise現(xiàn)在完成時（1）含義：表示過去發(fā)生的動作對現(xiàn)在還有影響。（2）基本結(jié)構(gòu)：主語 + have / has + 過去分詞（3）基本用法：表示過去發(fā)生的動作，但強調(diào)對現(xiàn)在產(chǎn)生影響。特征：不能與表示具體的時間狀語連用。表示過去發(fā)生的動作或存在的狀態(tài)一直延續(xù)到現(xiàn)在，還可能繼續(xù)下去。常常與since, for, in the past + 時間名詞，in the last +時間名詞等時間狀語連用，而且謂語動詞要求是延續(xù)性動詞。表示一種“經(jīng)歷或體驗”，即可以表示經(jīng)歷過也可以是從來都沒有經(jīng)歷過。Complete the followin

7、g 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 workedExercise4. The twins _ (wash) the clothes for an hour.5. He _ (play) basketball since three years ago.6. How long _ Sally _ (sing) yet?have

8、 washedhas playedhassung被動語態(tài)初中階段我們學習了七種被動結(jié)構(gòu)，歸納如下：（1）一般現(xiàn)在時是被動語態(tài)：am / is / are + 過去分詞（2）現(xiàn)在完成時的被動式： have / has + been + 過去分詞（3）現(xiàn)在進行時的被動式：am/ is/ are + being + 過去分詞（4）一般過去時的被動式：was / were + 過去分詞（5）過去進行時的被動式：was / were + being + 過去分詞（6）過去完成時的被動式：had + been + 過去分詞（7）一般將來時的被動式：will / be going to be+ 過去分詞（8

9、）含有情態(tài)動詞的被動式：情態(tài)動詞+be +動詞的過去分詞。Translate the sentences by using Passive voice.1. 剛才一些老年人參觀了博物館。2. 工人們使用不同種類的機器工作。The museum was visited by some old people just now. Different kinds of machines are used to work by the workers. Exercise情態(tài)動詞情態(tài)動詞表示說話人對某一動作或狀態(tài)的態(tài)度，如認為“可能”、“應(yīng)當”、“必要”等。情態(tài)動詞本身有一定的意義，但不能單獨作謂語，也沒

10、有人稱和數(shù)的變化。后面一般跟動詞原形。used to 結(jié)構(gòu)used to意為“過去常常做某事”，指的是過去的習慣性動作，目的在于與現(xiàn)在形成對照。used to是個情態(tài)動詞，其中的to是不定式符號，后面跟動詞原形。在美式英語中。它的疑問式是：Did 主語use to do sth？否定式是：主語didnt use。在英式英語中，它的疑問式應(yīng)當是：Used 主語to sth？否定式應(yīng)當是used not to或use（d）nt to。He used to stay up late. 他過去常熬到很晚。Translation.1. 我們不能在教室里吃東西。2. 首先你必須完成作業(yè)。3. 他現(xiàn)在不可能

11、在家。4. 她一定知道這個問題的答案。ExerciseWe 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.Joe: _you ever _ (take) part in an environmental project?Ken: Yes, I have. I _ (help) with a Clean-Up Day last year. It was _(consider) the

12、biggest clean-up project this city ever _(have).Fill in the blanks with the correct forms of the verbs in brackets.Have taken helpedconsideredhad had4aJoe: How many people _ (take) part?Ken: I _ (think) more than 1,000 people _(come) to help out.Joe: Thats fantastic! I guess everyone in this city is

13、 _ (try) to improve the environment.Ken: Yes, we cant afford to _ (wait) any longer to take action!tookthinkcametryingwaitFill in the blanks with the appropriate modal verbs from the box. People _ think that big things _ be done. However, many forget that saving the earth begins with small things. F

14、or example, you _ save electricity by turning off the lights when you leave a room. You _ also use paper or reusable bags instead of plastic bags. can could would have to should must may/mightmayshouldcouldwould4bMake a list for things that people can do to help the environment and discuss your list

15、 with your partner.A: I think that everyone should use public transportation.B: I disagree. its difficult for parents with young children to use public transportation.use public transportation.4c Discussing.use public transportationtake your own shopping bags when go shoppingreduce the use of air co

16、nditioners in summerturn off the lights when you leave the roomgrow more plants.4cA: I think that everyone should take your own shopping bags when go shopping.B: I agree. its good for the environment. A: I think that everyone should reduce the use of air conditioners in summer.B: I disagree. the sum

17、mer is so hot, especially in sourth China. Without air-conditioners, people may not have the patience to work.A: I think that everyone should turn off the lights when you leave the room.B: I agree. its good to save energy resources.A: I think that everyone should use public transportation.B: I disag

18、ree. its diffcult for parents with young children to use public transportation.A: I think that everyone should grow more plants.B: I agree. growing more plants will provide us more fresh air and make our plant more beautiful. 選擇填空：1.- _ you pass me a pen? Id like to write down the phone number. - Su

19、re. 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. wont4. - Excuse me. Is this the right way to the Summer Palace? - So

20、rry, 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. mustnt B. may not C. cant D. neednt6. He promised to pick me up at the school gate. However, he _ yet. A. didnt arrive B. doesnt arrive C. isnt arriving D. hasn

21、t arrived7. Ba Jin, one of the greatest writers in China, _ as “Peoples Writer”. A. is regarded B. has regarded C. is regarding D. regards8. Where is Tom? He _ in his room. A. is readingB. readsC. readD. was reading 9. May I go out now, Dad? No. You _ let your mother know first. A. can B. may C. nee

22、d D. must10. 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 drinking11. (2013江蘇淮安) Its getting dark. Please _ the light. A. turn on B. turn off C. turn down D. turn around12. (2013

23、湖北隨州)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. was used to; is used to walking C. was used to; is used to walk D. used to; is used to walking13. In the last ten month, September Miracle ( 奇跡) _on CCTV for more than five times and is popular all