Unit 2 Discovering useful structuresppt课件(2022)高中英语新人教版（新教材）必修第二册.pptx

1、Unit 2 Wildlife ProtectionDiscovering Useful StructuresIn this section,you are going to:recognize the structure of the present continuous passive voice;learn about the usage and function of the present continuous passive voice;identify the differences between the present continuous active voice and

2、the present continuous passive voice.Underline the present continuous passive voice in the sentences and discuss its function.1 African elephants are being hunted.What is being done to help them?What measures are being taken to help them?Find more sentences with the same verb form in this unit.They

3、are being hunted,illegally,for their valuable fur.Much is being done to protect wildlife.语 境 自 主 领 悟观察原句自主感悟1.African elephants are being hunted.2.What is being done to help them?3.What measures are being taken to help them?1.例句1、2、3中都用了现在进行时的被动语态，其谓语构成是：am/is/arebeingdone。2.都表示此刻或现阶段正被进行的动作。被动语态主动语

4、态1.African elephants are being hunted.2.What is being done to help them?3.What measures are being taken to help them?1.Hunters are hunting African elephants.2.What are people doing to help them?3.What measures are people taking to help them?语态构成形式三种不同时态am/is/are being done现在进行时的被动语态现在进行时的被动语态am/is/a

5、re doing现在进行时的主动语态现在进行时的主动语态am/is/are done一般现在时的被动语态一般现在时的被动语态肯定句肯定句主语主语 be(am/is/are)being done否定句否定句主语主语 be(am/is/are)not being done一般疑问句一般疑问句be(am/is/are)主语主语 being done特殊疑问句特殊疑问句特殊疑问词特殊疑问词 be(am/is/are)主语主语 being done现在进行时的被动语态的结构1.表示此刻正被进行的动作表示此刻正被进行的动作，句中常用句中常用now，at the moment等时间状语。等时间状语。A ne

6、w film is being shown in the theatre.Lets go to see it.电影院里正在放映新电影呢，咱们去看吧。2.表示现阶段正被进行的动作表示现阶段正被进行的动作，但此动作在此时此刻不一定正在发生。但此动作在此时此刻不一定正在发生。Could I use your car please?Mine is being repaired by the workers.我能用你的车吗？我的车正在被工人们修着。现在进行时的被动语态的用法3.表示一种经常性的被动行为表示一种经常性的被动行为，常和常和always，constantly，frequently等表示等表示频

7、率的副词连用频率的副词连用，这种用法常常带有说话者的赞扬或厌恶的感情色彩。这种用法常常带有说话者的赞扬或厌恶的感情色彩。I feel very puzzled that the goods in our shop are always being stolen.我感到很迷惑，我们商店的商品老是被偷。4.表示按计划或安排，主语将要承受谓语动词所表示的动作。表示按计划或安排，主语将要承受谓语动词所表示的动作。A party is being held tonight.今晚将要举行一场晚会。5.与部分情态动词连用与部分情态动词连用，表示对正在发生的动作的推测。表示对正在发生的动作的推测。He may

8、 be being scolded by his father at the very moment.此刻他也许正被他父亲责骂。使用现在进行时的被动语态应注意的问题1.不可遗漏being现在进行时的被动语态中，be为第一助动词，being为第二助动词，缺一不可，且位置不可互换。此结构若缺少being，则成为一般现在时的被动语态或系表结构。试比较：The report is being written by the best student.报告正在由一名最好的学生写着。The glass is broken.这块玻璃碎了。(系表结构)2.不可遗漏介词take care of，look afte

9、r，talk about，think of等动词短语用于现在进行时的被动语态时，其中的介词不可省略。Look！The children are being taken care of by their aunt.瞧！那些孩子正由他们的姨妈照看着。使用现在进行时的被动语态应注意的问题3.没有现在进行时的被动语态的动词非延续性动词、表示存在意义、所属关系、静态特征的动词以及系动词不用于现在进行时的被动语态。The book belongs to him.这本书是他的。4.“be(am/is/are)under/in n.”结构有时可相当于现在进行时的被动语态。The bridge is in us

10、e.The bridge is being used.这座桥正在使用中。句子翻译据报道，这个湖里的水现在没有得到保护。It is reported that the water in the lake is not being protected now.这些婴儿正由这个护士照看吗？Are the babies being taken care of by this nurse?为了即将举行的英语演讲比赛，谁正接受训练？Who is being trained for the coming English speech contest?用括号中所给单词的正确形式填空The balance of

11、 nature on our planet _(threaten)as a large number of species _(drive)to extinction.Some scientists predict that half of all our plants and animals will be extinct by 2100.The question is why these species _(endanger).One of the main reasons is loss of habitat.Animal habitats _(destroy)as humans sea

12、rch for more natural resources to consume(消费).More land _(also use)for growing crops or keeping livestock(家畜).In addition,massive amounts of waste _(produce)by humans,which are polluting animal habitats.Harmful chemicals created by human activities _(release)into the air,water,and soil.The whole of

13、nature _(affect)by human beings.is being threatenedare being drivenare being endangeredare being destroyedis also being usedare being producedare being releasedis being affected用括号中所给单词的正确形式填空However,much has been done and _(still do)to save endangered species.Many programmes _(design)to preserve th

14、e populations of endangered species.In my opinion,there is still hope that humans can live in harmony with all things on the earth.is still being doneare being designedChoose the suitable verb forms to complete the sentences.21.Im(working/being worked)at home today because my office is(painted/being

15、 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 hunted)the kangaroos?Where are they(hunted/being hunted)?6.It is rep

16、orted that living spaces for wildlife are(reduced/being reduced)due to the cutting of trees.3 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

17、are many different kinds of animals,including 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

18、 nets.Wild ducks (sell)at food markets.Fish and snakes (kill)for 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 can we do?are being caughtare being sold

19、are being killedis being destroyedare being coveredis being pollutedreserveplain make out observe remind sacredshoot profitn.（动植物）保护区；储藏（量）（动植物）保护区；储藏（量）vt.预订；预留；保留预订；预留；保留n.平原平原adj.简单明了的；直率的；平凡的简单明了的；直率的；平凡的看清；听清；分清看清；听清；分清vt.观察（到）；注视；遵守观察（到）；注视；遵守vt.提醒；使想起提醒；使想起adj.神圣的；受尊敬的神圣的；受尊敬的vt.&vi.射杀；射伤；发射射

20、杀；射伤；发射n.利润；利益利润；利益watch overday and night attack effectiveremove intend threatexist harmonyremind sb of sb/sth 保护；照管；监督保护；照管；监督日日夜夜；夜以继日日日夜夜；夜以继日n.,&vt.&vi.攻击；抨击攻击；抨击adj.有效的；生效的有效的；生效的vt.去除；移开；脱去去除；移开；脱去vi.&vt.打算；计划；想要打算；计划；想要n.威胁威胁vi.存在；生存存在；生存n.和谐；融洽和谐；融洽使某人想起（类似的人或物）使某人想起（类似的人或物）In 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?4