Unit2Discoveringusefulstructures课件-高中英语人教版（2019）必修第二册

Unit2WildlifeProtectionDiscoveringUsefulStructuresLearningObjectivesInthissection,youaregoingto:recognizethestructureofthepresentcontinuouspassivevoice;learnabouttheusageandfunctionofthepresentcontinuouspassivevoice;identifythedifferencesbetweenthepresentcontinuousactivevoiceandthepresentcontinuouspassivevoice.DiscoveringUsefulStructuresUnderlinethepresentcontinuouspassivevoiceinthesentencesanddiscussitsfunction.1Africanelephantsarebeinghunted.Whatisbeingdonetohelpthem?Whatmeasuresarebeingtakentohelpthem?Findmoresentenceswiththesameverbforminthisunit.Theyarebeinghunted,illegally,fortheirvaluablefur.Muchisbeingdonetoprotectwildlife.DiscoveringUsefulStructures语境自主领悟观察原句自主感悟1.Africanelephantsarebeinghunted.2.Whatisbeingdonetohelpthem?3.Whatmeasuresarebeingtakentohelpthem?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/are＋being＋done。2.都表示此刻或现阶段正被进行的动作。DiscoveringUsefulStructures被动语态主动语态1.Africanelephantsarebeinghunted.2.Whatisbeingdonetohelpthem?3.Whatmeasuresarebeingtakentohelpthem?1.HuntersarehuntingAfricanelephants.2.Whatarepeopledoingtohelpthem?3.Whatmeasuresarepeopletakingtohelpthem?DiscoveringUsefulStructures语态构成形式三种不同时态am/is/arebeingdone现在进行时的被动语态am/is/aredoing现在进行时的主动语态am/is/aredone一般现在时的被动语态DiscoveringUsefulStructures肯定句主语＋be(am/is/are)＋beingdone否定句主语＋be(am/is/are)＋not＋beingdone一般疑问句be(am/is/are)＋主语＋beingdone特殊疑问句特殊疑问词＋be(am/is/are)＋主语＋beingdone现在进行时的被动语态的结构DiscoveringUsefulStructures1.表示此刻正被进行的动作，句中常用now，atthemoment等时间状语。Anewfilmisbeingshowninthetheatre.Let’sgotoseeit.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，但此动作在此时此刻不一定正在发生。—CouldIuseyourcarplease?—Mineisbeingrepairedbytheworkers.——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DiscoveringUsefulStructures3.表示一种经常性的被动行为，常和always，constantly，frequently等表示频率的副词连用，这种用法常常带有说话者的赞扬或厌恶的感情色彩。Ifeelverypuzzledthatthegoodsinourshoparealwaysbeingstolen.

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。Apartyisbeingheldtonight.

今晚将要举行一场晚会。5.与部分情态动词连用，表示对正在发生的动作的推测。Hemaybebeingscoldedbyhisfatherattheverymoment.

此刻他也许正被他父亲责骂。DiscoveringUsefulStructures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：Thereportisbeingwrittenbythebeststudent.报告正在由一名最好的学生写着。Theglassisbroken.这块玻璃碎了。(系表结构)2.不可遗漏介词takecareof，lookafter，talkabout，thinkof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！Thechildrenarebeingtakencareof

bytheiraunt.瞧！那些孩子正由他们的姨妈照看着。DiscoveringUsefulStructures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。Thebookbelongstohim.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。Thebridgeisinuse.＝Thebridgeisbeingused.这座桥正在使用中。DiscoveringUsefulStructures

句子翻译据报道，这个湖里的水现在没有得到保护。Itisreportedthatthewaterinthelakeisnotbeingprotectednow.这些婴儿正由这个护士照看吗？Arethebabiesbeingtakencareofbythisnurse?为了即将举行的英语演讲比赛，谁正接受训练？WhoisbeingtrainedforthecomingEnglishspeechcontest?DiscoveringUsefulStructures用括号中所给单词的正确形式填空Thebalanceofnatureonourplanet________________(threaten)asalargenumberofspecies________________(drive)toextinction.Somescientistspredictthathalfofallourplantsandanimalswillbeextinctby2100.Thequestioniswhythesespecies___________________(endanger).Oneofthemainreasonsislossofhabitat.Animalhabitats____________________(destroy)ashumanssearchformorenaturalresourcestoconsume(消费).Moreland___________________

(alsouse)forgrowingcropsorkeepinglivestock(家畜).Inaddition,massiveamountsofwaste________________(produce)byhumans,whicharepollutinganimalhabitats.Harmfulchemicalscreatedbyhumanactivities____________________(release)intotheair,water,andsoil.Thewholeofnature________________(affect)byhumanbeings.isbeingthreatenedarebeingdrivenarebeingendangeredarebeingdestroyedisalsobeingusedarebeingproducedarebeingreleasedisbeingaffectedDiscoveringUsefulStructures用括号中所给单词的正确形式填空However,muchhasbeendoneand________________(stilldo)tosaveendangeredspecies.Manyprogrammes________________(design)topreservethepopulationsofendangeredspecies.Inmyopinion,thereisstillhopethathumanscanliveinharmonywithallthingsontheearth.isstillbeingdonearebeingdesignedDiscoveringUsefulStructuresChoosethesuitableverbformstocompletethesentences.21.I’m(working/beingworked)athometodaybecausemyofficeis(painted/beingpainted).2.Thealarmingreportis(written/beingwritten).Itwillbefinishedsoon.3.Whatpartofthecityis(attacked/beingattacked)now?4.Rightnow,thedeerare(watched/beingwatched)overbymanyvolunteers.5.Whois(hunting/beinghunted)thekangaroos?Wherearethey(hunted/beinghunted)?6.Itisreportedthatlivingspacesforwildlifeare(reduced/beingreduced)duetothecuttingoftrees.DiscoveringUsefulStructures3LiuTaowouldliketoexpresshisconcernoverthewetlandinhishometown.Helphimfinishthepassagewiththepresentcontinuouspassivevoiceoftheverbsinbrackets.Inthewetlandofmyhometown,therearemanydifferentkindsofanimals,includingwildbirds,fish,snakes,insectsandsoon.WhenIwasinprimaryschool,Ioftenwenttherewithmyfriendstowatchthebirdsandstudythem.Thatwasaninterestingplaceforallofus.Butthingshavebeguntochangeinrecentyears.Smallbirds

(catch)withnets.Wildducks

(sell)atfoodmarkets.Fishandsnakes

(kill)forfoodinrestaurants.Andevenworse,thewetland

(destroy).Someparts

(cover)withnewhouses.Youcanseerubbisheverywhere.Thewetland

(pollute)seriouslyeveryday.Iamveryworriedaboutit.Whatcanwedo?arebeingcaughtarebeingsoldarebeingkilledisbeingdestroyedarebeingcoveredis