Unit 2 Period 3 Discovering useful structures ppt课件-（2019）新人教版高中英语必修第二册.pptx

1、 Period 3 Discovering Useful StructuresUnit 2 Wildlife Protection Report an ongoing eventReviewSimple（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 doing

2、will/shall dowill/shall be doingwill/shall have donewill/shall have been doingshould/would doshould/would be doingshould/would have doneshould/would have been doingReviewChange 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) H

3、e waters the flowers every day.(2) The flowers are watered by him every day.(3) The famers dont grow apples 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?(3) What measures are being taken to help them?(2) What is being done

4、 to help them?(1) African elephants are being hunted.Underline the present continuous passive voice in the sentences and discuss its functionLead-inHunters are hunting African elephants.What are people doing to help them?What measures are people taking to help them?Find more sentences with the same

5、verb form in this unit.(Page-16 Paragraph 2)They are being hunted, illegally, for their valuable fur. (Page-16 Paragraph 7)Much is being done to protect wildlife.Lead-inExplore the rulesA basketball is being played by Miki.A book is being read by the girl.Our fur is being used to make sweaters for p

6、eople like you.小结：Present Progressive Passive Voice 现在进行时的被动语态现在进行时的被动语态1.1.定义定义：_ _1.1.定义定义：_ _表示“某人/事此时此刻正在被”，主语是动作的承受者, 表示说话时或现阶段某个被动的动作正在进行。2. 结构结构 1）肯定形式：am/is/arebeing过去分词The house is being painted. 2）否定形式: am/is/arenotbeing过去分词The trees are not being watered.3）疑问形式: Am/Is/Are主语being过去分词？Am I

7、being watched over?4）特殊疑问句的形式: 把特殊疑问词放在一般疑问句前面。How many bridges are being built in the village?1. The plan _ this month. 计划本月正在执行。2. Your computer _ now. 现在没人修理你的电脑。3. _ these fields _ this week？ 这周有人在给这些地浇水吗？4. Where _ you _ now？ 现在你们在哪里接受面试？is being carried outis not being repairedArebeing watered

8、arebeing interviewed3. 主动语态变被动语态的原则主动语态变被动语态的原则“三变三变”例：They are building nine parks.原句主语变为by短语宾语变为主语 谓语由主动变为被动“三不变三不变”原句意思不变 原句时态不变 原句主谓宾以外成分不变Nine parks _ by them. How many parks _?are being builtare being built例：1. Mary _ (interview) now.2. Look! The baby _ (take care of) by her aunt.3. The diseas

9、e _ (study) at present by scientist.4. 现在进行时的被动语态基本用法：现在进行时的被动语态基本用法：（1）表示现在正在进行的被动动作。is being taken care ofis being studiedis being interviewed（1）表示现在正在进行的被动动作。例：1.今晚将要举办一场晚会。 An party _ (held) tonight.2.下面将唱一首民歌。 A folk song _ (sing) next. 3.据说下周日早上八点他将开飞机去。 It is said that a plane_(flow) by him t

10、o America at eight next Sunday morning. is being heldis being sungis being flown（2）少数及物动词的进行时表示按计划、安排将要承受某个动作。(3)没有进行时的被动语态【练习】判断正误。 小王, 过来,有你的电话。Xiao Wang, come here. You arebeingwantedon the phone. Xiao Wang, come here. You arewanted on the phone. 一些表示状态、心理活动、拥有、存在等的动词(和主动语态一样)一般不用进行时被动语态, 常用一般现在时

11、被动语态表示此时此刻或目前主语承受谓语动词的动作。 (4)表示被动结构“be +under/ in等介词+名词” 结构可替换进行时被动语态。 is being attacked例：1. 目前这个城市正受到进攻。The city is under attack at the moment. 2. 桥梁正在建筑中。The bridge is under construction. is being constructedChoose the suitable verb form.1Im (working/being worked) at home today because my office i

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

13、ng hunted)?6It is reported that living spaces for wildlife are (reduced/being reduced) due to the cutting of trees.Activ. 1The 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,

14、 insects and so 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. Activ. 2Activ. 2uWhat is happening to the small birds in the wetland?uWhat is happenin

15、g to the wild ducks?uWhat is happening to the fish 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 killedActiv. 2uWhat is happening to the wetland?uWhat do you t

16、hink should be done to protect the wetland?The wetland _ (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 & AnswerProductionIn groups, discuss the questions below.

17、 Prepare to give a presentation of your ideas to the class.1. What do you know is being done in your neighbourhood to protect animals and plants?2. What suggestions do you have?u Useful Expressions: .is (are) being protected. It is good for. Its a wonderful habitat for. It makes our environment more

18、 .Sample ConversationA: What is being done in our 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 very old but also because they are the natural habitat for songbirds.D: Yes, that would c

19、ertainly help make the air cleaner for them.C: Thats right. Perhaps they could help protect the birds by making the roads around the park free from cars. 1.1.现在进行时的被动语态的基本结构现在进行时的被动语态的基本结构肯定结构be(am/is/are)being done否定结构be(am/is/are)+not+being done一般疑问结构be(am/is/are)+主语+being done特殊疑问结构特殊疑问词+be(am/is

20、/are)+主语+being doneSummary（1）表示现在正在进行的被动动作。（2）少数及物动词的进行时表示按计划、安排将要承受某个动作。 (3)没有进行时的被动语态 (4)表示被动结构“be +under/ in等介词+名词”结构可替换进行时被动语态。2.2.现在进行时的被动语态的基本用法现在进行时的被动语态的基本用法deern.鹿( pl. deer )Ananimalwithlonglegs,thateatsgrass,leaves,etc.andcanrunfast.Therearemanytypesofdeer.Example sentences： If we are hun

21、ted, many deer will be hurt each day. Huntsmen chased the deer silently.New wordsa deer park 鹿苑a herd of deer 一群鹿kangaroon.袋鼠( pl. -oos )AlargeAustraliananimalwithastrongtailandbacklegs,thatmovesbyjumping.Thefemalecarriesitsyounginapocketofskin(calledapouch)onthefrontofitsbody.Example sentences： Kid

22、s love stuff like exploring caves or kangaroo parks. Kangaroo attacks are relatively rare.New wordsreducevt.减少Tomakesthlessorsmallerinsize,quantity,price,etc.Example sentences： Oil is put in machinery to reduce the friction. Reduce what you need to do.New wordsreduce waste 减少浪费, 减少废弃物reduce expendit

23、ure 减少开支due adj. due toadv. 由于；因为Example sentences： We dig a hole, which is not easy, due to roots. That was made into an office due to its small size.New words because of as a result ofSynonym:insectn.昆虫( pl. -s)Anysmallcreaturewithsixlegsandabodydividedintothreeparts.Insectsusuallyalsohavewings.An

24、ts,beesandfliesareallinsects.Example sentences： The travellers face was covered with insect bites. He instanced the fly as dirty insect.New wordsinsect pest 害虫insect bite 昆虫咬伤；蚊虫叮咬neighbourhoodn.临近的地方；街区( pl. -s)Adistrictoranareaofatown;thepeoplewholivethere.Theareathatyouareinortheareanearaparticul

25、arplace.Example sentences： The fire alarmed the whole neighbourhood. My neighbourhood has really been built up.New wordsin the neighbourhood of 大约；在.附近HomeworkPrepare to give a presentation of your ideas next class. What do you know is being done in your neighbourhood to protect animals and plants? What suggestions do you have?