Unit 2 Discovering Useful Structures 公开课（ppt课件）-2022新人教版（2019）《高中英语》必修第二册.pptx

1、Discovering Useful Structures By the end of this period,students will be able to1.know about the structure of the present continuous passive voice and its function.2.master the usage of the present continuous passive voice.3.use the present continuous passive voice flexibly in the real context.Simpl

2、e（一般）Continuous（进行）Present（现在）do/doesTenseis/am/are doingPerfect（完成）Perfect continuous（完成）Past（过去）Future（过去）The past future（过去将来）have/has donehave/has been doingdidwas/were doinghad doneHad been doingwill/shall dowill/shall be doingwill/shall have donewill/shall have been doingshould/would doshould/

3、would be doingshould/would have doneshould/would have been doingReview Change the sentences into the passive form.Active voice(主动语态)Passive form(被动语态)(1)I take a book.(1)The book is taken by me.(2)He waters the flowers every day.(2)The flowers are watered by him every day.(3)The famers dont grow app

4、les on the farm.(3)Apples are not grown by the farmers on the farm.(4)Can we put our bikes here?(4)Can our bike be put here?Review 1.African elephants are being hunted._2.What is being done to help them?_3.What measures are being taken to help them?_Differences：_Observe and analyze Underline the pre

5、sent continuous passive voice,change them into active voice and compare the differences in meaning.所强调的重点（主语）不同。所强调的重点（主语）不同。Hunters are hunting African elephants.What are people doing to help them?What measures are people taking to help them?濒危动物 猎人 事件 人们 措施 大家Summarize the structure of the present

6、 continuous passive voice.Structure&Function肯定结构_否定结构_一般疑问结构_特殊疑问结构_be(am/is/are)being donebe(am/is/are)notbeing donebe(am/is/are)主语主语being done特殊疑问词特殊疑问词be(am/is/are)主语主语being done1.My sister is now being interviewed.Function:_2.Many interesting experiments are being carried out these days.Function

7、:_3.He is always being praised by the leader.Function:_ _4.A celebration is being held this weekend for his success.Function:_Observe the following sentences and figure out the function of the present continuous passive voice.Structure&Function被动语态的使用情境：不被动语态的使用情境：不知道或者不需要提及动作知道或者不需要提及动作的发出者；强调动作的承的

8、发出者；强调动作的承受者。受者。有时可表示按计划或安排将要进行的一个被动动作。表示此时此刻正在进行的被动动作。表示现阶段正在进行的被动动作(该动作在说话的瞬间未必正在进行)。这种用法常常带有赞扬或厌恶的感情色彩。表示一种经常性的被动行为，常和always,constantly 等表示频度的副词连用，Choose the suitable verb forms to complete the sentences.Consolidation1.Im(working/being worked)at home today because my office is(painted/being paint

9、ed).2.The alarming report is(written/being written).It will be finished soon.3.What part of the city is(attacked/being attacked)now?4.Right now,the deer are(watched/being watched)over by many volunteers.5.Who is(hunting/being hunted)the kangaroos?Where are they(hunted/being hunted)?6.It is reported

10、that living spaces for wildlife are(reduced/being reduced)due to the cutting of trees.Consolidation 1.The zoo is opening a new area for the two baby elephants._2.The doctors are not examining the patient._3.They are raising more funds for research into wildlife protection._4.The city is setting up a

11、 new nature reserve for endangered animals._5.Today we are completing our writing task online._Rewrite the sentences using the present continuous passive voice.Today our writing task is being completed online.A new area is being opened for the a two baby elephants(by the zoo).The patient is not bein

12、g examined(by the doctors).More funds are being raised for research into wildlife protection.A new nature reserve is being set up for endangered animals in/by the city.Consolidation In the wetland of my hometown,there are many different kinds of animals,including wild birds,fish,snakes,insects and s

13、o on.When I was in primary school,I often went there with my friends to watch the birds and study them.That was an interesting place for all of us.But things have begun to change in recent years.Small birds _(catch)with nets.Wild ducks _(sell)at food markets.Fish and snakes _(kill)for food in restau

14、rants.And even worse,the wetland _(destroy).Some parts _(cover)with new houses.You can see rubbish everywhere.The wetland _(pollute)seriously every day.I am very worried about it.What can we do?Finish the following passage with the present continuous passive voice of the verbs in brackets.is being p

15、ollutedare being caughtare being soldare being killedis being destroyedare being coveredThe passage is about Liu Taos concern of the wetland in his hometownIn the wetland of my hometown,there are many different kinds of animals,including wild birds,fish,snakes,insects and so on.When I was in primary

16、 school,I often went there with my friends to watch the birds and study them.That was an interesting place for all of us.But things have begun to change in recent years.ConsolidationuWhat is happening to the small birds in the wetland?uWhat is happening to the wild ducks?uWhat is happening to the fi

17、sh and snakes?Question&AnswerSmall birds _(catch)with nets.are being caughtWild ducks _(sell)at food markets.are being soldFish and snakes _(kill)for food in restaurants.are being killed ConsolidationuWhat is happening to the wetland?uWhat do you think should be done to protect the wetland?The wetla

18、nd _(destroy).Some parts _(cover)with new house.You can see rubbish everywhere.The wetland _(pollute)seriously every day.are being destroyedare being coveredis being pollutedQuestion&Answer Consolidation Consolidation Hello,everyone!Ive just come back from a wonderful trip to Tibet.It was so beautif

19、ul there that_.The scenery was so impressive and the air was so fresh and clean._.However,_.Cans,_ as they pass through Tibet.I worry about the effect this will have on the local wildlife._.We should all think about this.A.Visitors are being told to pay more attention to protecting the environment.B

20、.this beautiful countryside is being spoiled by careless visitors C.paper and plastic bags are still being thrown away by many tour groups D.How can we make visitors more aware of the damage that is being done to the environment?E.I felt I was in a fairyland(仙境仙境)Complete the speech with the correct

21、 sentences or clauses.Then discuss possible solutions in groups.EABCD Summary巧学助记主动语态变被动语态的原则巧学助记主动语态变被动语态的原则:“三变三变”原则原则:原主变为原主变为by短语短语 原宾变为现主语原宾变为现主语 谓语主动变被动。谓语主动变被动。“三不变三不变”原则原则:原句意思不变原句意思不变;原句时态不变原句时态不变 原句主谓宾以外成分不变。原句主谓宾以外成分不变。Discuss in groups and prepare to give a presentation of your ideas to

22、the class.A:What do you know is being done in your neighbourhood to protect animals and plants?B:Well,the old trees in the park are being protected.A:Oh yes.They are being protected not only because they are the natural habitat for songbirds.C:Thats right.Perhaps they could help protect the birds by

23、 making the roads around the park free from cars.D:Yes,that would certainly help make the air cleaner for them For example:What suggestions do you have?PresentationI.Finish the exercises on the work sheet.（on Workbook P68-69）.II.Make small conversations with your classmates using the present continuous passive voice.