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

1、人教版必修人教版必修第二册第二册Period 3 Discovering Useful StructureThe Present Continuous Passive VoiceUnit 2 Wildlife Protection Learn to know the structure of present continuous passive voice.Learn to use present continuous passive voice to describe the ongoing events.Learn to use present continuous passive voi

2、ce to describe the endangered animals conditions and measures taken to help them.nHave you still remembered the structure of present continuous tense?nHave you still remembered the use of present continuous tense?nLearn to know the structure of present continuous passive voice课本课本18页第页第1题题Underline

3、the present continuous passive voice in the sentences and discuss its function.African elephants are being hunted.What is being done to help them?What measures are being taken to help them?am/is/are+being+P.PFind more sentences with the same verb form in this unit.They are being hunted,illegally,for

4、 their valuable fur.Much is being done to protect wildlife.the use of present continuous passive voicePresent continuous passive voice is used in the same conditions where present continuous tense is used.But it express a passive voice.They are being hunted,illegally,for their valuable fur.People ar

5、e hunting Tibetan antelopes,illegally,for their valuable fur.The two sentences are telling the same thing but in two different ways.Summary现在进行时的被动语态1.定义 表示表示“某人某人/事事此时此刻正在被此时此刻正在被”，主语主语是动作的承受者是动作的承受者,表示说话时或现阶段某个表示说话时或现阶段某个被动的动作正在进行。被动的动作正在进行。Present Continuous Passive Voiceeg The man is being quest

6、ioned by the police now.Measures are being taken to protect those endangered animals.Am I being taken for a ride?2.句型 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 being watched over?4）特殊疑问句的形式:把特殊疑问词放

7、在一般疑问 句前面。How many bridges are being built in the village?主语主语+am/is/are+being+done 1.She is being treated in China now.2.My computer is being repaired now.我的电脑正在修理中。我的电脑正在修理中。notnotnot Am/Is/Are+主语主语+being+donee.g:1.Are these books being sent to Beijing？2._?2._?Is the wall being painted疑问词疑问词When H

8、ow Where Why What 3.主动语态变被动语态的原则“三变三变”例：They are building nine parks.原句主语变为原句主语变为byby短语短语宾语变为主语宾语变为主语 谓语由主动变为被动谓语由主动变为被动“三不变三不变”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Nine parks _ by them.How many parks _?are being builtare being builtPlay gamesWhat are they doing now?A house is being built

9、 by the workers.The workers are building a house.The workers are building the house.the workers.What are the workers doing？The house is being built by主语主语谓语谓语宾语宾语The workersare building the house宾语宾语主语主语 谓语变被动谓语变被动 （时态不变）（时态不变）be+being+done+bySomeone is hunting African elephant.someone.African eleph

10、ant is being hunted by主语主语谓语谓语宾语宾语Someone is hunting African elephant宾语宾语主语主语 谓语变被动谓语变被动 （时态不变）（时态不变）be+being+done+by()They are hunting Tibetan antelopes.them.Tibetan antelopes are being hunted by主语主语谓语谓语They are huntingTibetan antelopes宾语宾语主语主语 谓语变被动谓语变被动 （时态不变）（时态不变）be+being+done+by宾语宾语()Pandas ar

11、e being protected in Wolong Natural Reserve.结构：结构：_am/is/are being+done A basketball is being played by Miki.A book is being read by the girl.Our fur is being used to make sweaters for people like you.小结小结：Present Progressive Passive VoicePresent Progressive Passive Voice 现在进行时的被动语态现在进行时的被动语态 When d

12、o we use the Present Progressive Passive Voice?表示表示说话时说话时正在进行的被动动正在进行的被动动作作.(now,at the moment)Actions are being taken to realize Chinese Dream.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.表示一种表示一种习惯的被动行为习惯的被动行为(always,constant

13、ly),带有赞扬、羡慕、讨厌等感情色彩。带有赞扬、羡慕、讨厌等感情色彩。Children of our neighbors are always being praised by our parents.与某些与某些情态动词情态动词连用表示对正在发生的动作进行连用表示对正在发生的动作进行推测推测As a result of staying up late talking last night,Jimmy may be being scolded by his headteacher.【拓展拓展】现在现在进行时的被动语态与进行时的被动语态与always,constantly等等词连用时，表示经常

14、性的被动动作，此时往往词连用时，表示经常性的被动动作，此时往往带有赞赏、厌恶等感情色彩。带有赞赏、厌恶等感情色彩。eg Recently my daughter is always being praised by the teachers.To the teachers anger,the same mistakes are always being made by his students.（1 1）少数及物动词的进行时表示按）少数及物动词的进行时表示按计划计划、安安 排排将将要承受要承受某个动作。某个动作。例：例：1.1.今晚将要举办一场晚会。今晚将要举办一场晚会。An party _(

15、held)tonight.2.2.下面将唱一首民歌。下面将唱一首民歌。A folk song _(sing)next.3.3.据说下周日早上八点他将开飞机去据说下周日早上八点他将开飞机去。It is said that a plane_(flow)by him to America at eight next Sunday morning.is being heldis being sungis being flown(2)(2)没有进行时的被动语态没有进行时的被动语态一些表示一些表示状态、心理活动、拥有、存在状态、心理活动、拥有、存在等的动等的动词词(和主动语态一样和主动语态一样)一般不用进

16、行时被动语态一般不用进行时被动语态,常用常用一般现在时被动语态一般现在时被动语态表示此时此刻或目前表示此时此刻或目前主语承受谓语动词的动作主语承受谓语动词的动作如如have，want，need，love，。【练习】判断正误。【练习】判断正误。小王小王,过来过来,有你的电话。有你的电话。Xiao Wang,come here.You are being wanted on the phone.Xiao Wang,come here.You are wanted on the phone.With the population increasing，more land is needed.(3)(

17、3)表示被动结构表示被动结构“be+under/in等介词等介词+名词名词”结构可结构可替换替换进行时被动语态。进行时被动语态。is being attacked例：例：1.目前这个城市正受到进攻。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。桥梁正在建筑中。The bridge is under construction.is being constructedn课本课本18页第页第2题题Choose the suitable verb forms to complete the sentences.1.Im(wor

18、king/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/being watched)over by many volunteers.5.Who is(hunting/being hu

19、nted)the kangaroos?Where are they(hunted/being hunted)?6.Its reported that living spaces for wildlife are(reduced/being reduced)due to the cutting of trees.n.鹿鹿n.袋鼠袋鼠vt.减少减少1.We are doing many things to protect the animals.Many things are being done to protect the animals.Change the sentences into t

20、heir passive voice.2.We are seeing the Tibetan antelopes next week.The Tibetan antelopes are being seen next week.3.We are observing the Tibetan antelopes these days.The Tibetan antelopes are being observed these days.Have you visited a wetland?What can you see in the wetland?Why should we set up th

21、e wetland?课本课本18页第页第3题题Liu Tao would like to express his concern over the wetland in his hometown.Help him finish the passage with the present continuous passive voice of the verbs in brackets.In the wetland of my hometown,there are many different kinds of animals,including wild birds,fish,snakes,in

22、sects 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.n.昆虫昆虫Small birds _(catch)with nets.Wild ducks _(sell)at food markets.Fish and snakes _(kill)f

23、or food in restaurants.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 should we do?are being caughtare being soldare being killedis being destroyedare being coveredis be

24、ing pollutedn.网网 Why does Lin Tao use present continuous passive voice in the passage?In what conditions can we use present continuous passive voice when we are expressing our ideas?It is reported that living spaces for wildlife are being reduced due to the cutting of trees.reduce vt.to make somethi

25、ng smaller or less in size,amount,or price 缩小缩小;减少减少;降低降低【归纳归纳】reducereduce.(from.)to.把把（从（从）减少到）减少到reduce.to sth./doing sth.使使陷入某种状况陷入某种状况/状态状态reduce.by.把把减少减少 reduce sb.to.降职降职eg My weight reduces when I stop eating sugar.It reduces the risks of heart disease.The new bridge should reduce travellin

26、g time(from 50 minutes)to 15 minutes.Costs on books have been reduced by 20%over the past year.【语境应用语境应用】根据提示完成句子。根据提示完成句子。1)The number of the employees _ _ _ _(被削减了被削减了)40%in the last five months.2)The population here has _ _ _(减少到减少到)fifty thousand now.3)那个军官被降职成一名士兵。那个军官被降职成一名士兵。The officer was r

27、educed to a soldier.has been reduced bybeen reducedto 【归纳归纳】due adj.预定的预定的;到期的到期的 due to:because of 由于；由于；因为因为 预期做预期做某某事事,预定要做某事预定要做某事 be due to sth./sb.归因于某事归因于某事/某人某人;欠某人欠某人 be due for sth.应有某物应有某物;应得到某物应得到某物 【联想联想】表示表示“由于由于,因为因为”的短语还有的短语还有:because of,as a result of,thanks to,on account of,owing t

28、o等。等。【语境应用语境应用】单句语法填空。单句语法填空。1)The policeman said the accident last night was _ driving.警察说昨晚的事故是由于粗心驾驶造成的。警察说昨晚的事故是由于粗心驾驶造成的。2)His new book _ next year.他的新书预计明年出版。他的新书预计明年出版。due to carelessis due to be publishednUse present continuous passive voice to describe wildlife protection in your surroundin

29、gsIn groups,discuss the questions below.Prepare to give a presentation of your ideas to the class.What do you know is being done in your neighbourhood to protect animals and plants?What suggestions do you have?n.临近的地方；临近的地方；街区街区A:What is being done in our neighbourhood to protect animals and plants?

30、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 making the roads around the park free from cars.D:Yes,that would certainly help make the air cleaner for themFinish the discuss in Activity 4.