【课件】Unit+2Discovering+useful+structures语法课课件人教版必修第二册.pptx

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1、被动语态Everybody,everybody wants to love.Everybody,everybody wants to be loved.语态的种类英语动词有两种语态：主动语态 doingthe active voice被动语态 donethe passive voice主动语态表示主语是动作的发出者We plant the trees.动作的发出者 表动作被动语态表示主语是动作的承受者The trees are planted by us.动作的承受者表动作被动语态的构成主语+be+donebe负责时态变化相当于助动词The flowers are planted by Jim

2、done体现被动，过去分词恒定不变被动语态的构成The boy ate my egg.eat-ate-eatenMy egg _ by the boy.was eaten 被动语态的构成The dog bit the man.bitebitbittenThe man bit the dog.The man was bitten by the dog.被动语态的构成People speak English in Canadaspeakspokespoken English _ by people in Canada.is spoken被动语态的思路1.判断句子的时态2.判断主语与动词之间的语态关

3、系（即主语是动作的发出者还是承受者，如果主语是动作的发出者则是主动语态。如果主语是动作的承受者则是被动语态）3.主语的单复数直接决定be动词的单复数形式。被动语态的时态被被动语态的的时态被被动词be 体体现时态done一般一般现在在时 am,is,aredone一般一般过去去时was,weredone一般将来一般将来时will bedone现在在进行行时am/is/are beingdone现现在完成在完成时时have/has beendone过过去去进进行行时时was/were beingdone过过去完成去完成时时had beendone过过去将来去将来时时would/should bed

4、one情情态动词态动词can/must/may bedoneThe Present Continuous Passive Voice-Unit 2 Wildlife Protection-现在进行时的被动语态(3)What measures are being taken to help them?(2)What is being done to help them?(1)African elephants are being hunted.Find out the following sentences in the reading text first,and then underline

5、 the present continuous passive voice in the sentences and discuss its function.Hunters are hunting African elephants.What are people doing to help them?What measures are people taking to help them?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。1.被被动语态的构成的构成1.The book was written by Lu Xun.2.The

6、classrooms are cleaned by students every day.3.This maths problem can be worked out by little Tom.被被动语态的构成的构成：主：主语+be(am/is/was/are/were)+done2.2.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 bein

7、g 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?eg：They are building two stadiums.“三不变”Two stadiums _ by them.How many stadiums _?are being builtare being built3.3.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”原句原句主语主语 by的的宾语宾语宾语宾语 主语主语 谓语谓语由主动由主动 被动被动原句原句意思意思不变不变 原句原句时态时态不

8、变不变 原句原句主谓宾以外主谓宾以外成分不变成分不变表示说话时表示说话时正在进行正在进行的被动动作的被动动作,句中常用句中常用now,right now,at this moment,at present,these days(这些天来些天来)等时间状语。等时间状语。Some food is being eaten by the bear.用法用法表示表示现阶段现阶段正在进行的被动动作正在进行的被动动作.(说话时不一定在进行说话时不一定在进行)The problem of food safety is being studied by scientists at present.表示一种表示一

9、种习惯的被动行为习惯的被动行为(always,constantly),带有赞带有赞扬、羡慕、讨厌等感情色彩。扬、羡慕、讨厌等感情色彩。Children of our neighbors are always being praised by our parents.Lets watch a short video and answer:What happened to the animals?From the video we can see:Human beings kill wild animals.Wild animals by human beings.At present,human

10、 race are destroying the environment.At present,the environment by human race.is being destroyedare killedBesides,human beings are cutting down trees for house building.Trees by human beings for house building.are being cut downNowadays,some factories are polluting the river.Nowadays,the river by so

11、me factories.As a result,animals are losing their habitats.is being pollutedNow,wild animals (kill)by people,and also their fur (use)to make clothes for humans.are being killedis being used soft goldShahtoosh(沙沙图什）什）:is a type of luxury shawl(披巾)made from the valuable fur of antelopePractice(P18)1 C

12、hoose the suitable verb forms to complete the sentences.1.Im(working/being worked)at home today because my office is(painted/being painted).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

13、/being watched)over by many volunteers.5.Who is(hunting/being hunted)the kangaroos?Where are they(hunted/being hunted)?6.It is reported that living spaces for wildife are(reduced/being reduced)due to the cutting of trees.In the wetland of my hometown,there are many different kinds of animals,includi

14、ng wild birds,fish,snakes,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.Small birds _(catch)with nets.Wild ducks _(sell)at food markets.Fi

15、sh and snakes _(kill)for food in restaurants.And even worse,the wetland _(destroy).Some part_(cover)with new houses.You can see rubbish everywhere.The wetland _(pollute)seriously every day.I am very woried about it.What can we do?are being caughtare being soldare being killedis being destroyedis bei

16、ng pollutedare being covered 1.It is reported that many a new house _ (build)at present in the disaster area.is being built2.Traditional folk arts of Tianjin like paper cutting _ (exhibit)at the culture show of the 2010 Shanghai World Expo.are being exhibited3.Hi,Terry,can I use your computer for a

17、while this afternoon?Sorry.It _(repair).is being repaired4.Would you please keep silent?The weather report _(broadcast)and I want to listen.is being broadcastMake sentences by using passive voice.rhino horn犀牛角2341sharkplastic bottlesrubbish垃圾5air;smokeGreat efforts are being made to enable human and wildlife live in harmony.When the buying stops,the killing can too.