新教材2021学年高中英语人教必修第二册学案Unit2Period4DiscoveringUsefu

Unit2WildlifeProtectionPeriod4DiscoveringUsefulStructures学习目标1.Tohaveagoodunderstandingofthestructureofthepresentcontinuouspassivevoiceanditsfunction.2.Tomastertheusageofthepresentcontinuouspassivevoicethroughself-studyandpractice.3.Tousethepresentcontinuouspassivevoiceflexiblyintherealcontext.课堂探究PartⅠObservationandanalysisPayattentiontotheunderlinedparts:thepresentcontinuouspassivevoice,changethemintoactivevoiceandcomparethedifferencesinmeaning.1.Africanelephantsarebeinghunted.→2.Whatisbeingdonetohelpthem?→3.Whatmeasuresarebeingtakentohelpthem?→Differences:PartⅡThestructuresandthefunctionsActivity1Summarizethestructuresofthepresentcontinuouspassivevoice.肯定结构否定结构一般疑问结构特殊疑问结构Activity2Observethefollowingsentencesandfigureoutthefunctionsofthepresentcontinuouspassivevoice.1.Mysisterisnowbeinginterviewed.Function:2.Manyinterestingexperimentsarebeingcarriedoutthesedays.Function:3.Heisalwaysbeingpraisedbytheleader.Function:4.Acelebrationisbeingheldthisweekendforhissuccess.Function:被动语态的使用情境:不知道或者不需要提及动作的发出者;强调动作的承受者。PartⅢConsolidationActivity1Choosethesuitableverbformstocompletethesentences.1.Im(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.Activity2Rewritethesentencesusingthepresentcontinuouspassivevoice.(WorkbookP68UsingStructuresExercise2)1.Thezooisopeninganewareaforthetwobabyelephants.→2.Thedoctorsarenotexaminingthepatient.→3.Theyareraisingmorefundsforresearchintowildlifeprotection.→4.Thecityissettingupanewnaturereserveforendangeredanimals.→5.Todaywearecompletingourwritingtaskonline.→Activity3LiuTaowouldliketoexpresshisconcernoverthewetlandinhishometown.Helphimfinishthefollowingpassagewiththepresentcontinuouspassivevoiceoftheverbsinbrackets.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?Activity4Completethespeechwiththecorrectsentencesorclauses.Thendiscusspossiblesolutionsingroups.(WorkbookP69UsingStructuresExercise5)Hello,everyone!IvejustcomebackfromawonderfultriptoTibet.Itwassobeautifultherethat.Thescenerywassoimpressiveandtheairwassofreshandclean.However,.Cans,astheypassthroughTibet.Iworryabouttheeffectthiswillhaveonthelocalwildlife.Weshouldallthinkaboutthis.A.Visitorsarebeingtoldtopaymoreattentiontoprotectingtheenvironment.B.thisbeautifulcountrysideisbeingspoiledbycarelessvisitorsC.paperandplasticbagsarestillbeingthrownawaybymanytourgroupsD.Howcanwemakevisitorsmoreawareofthedamagethatisbeingdonetotheenvironment?E.IfeltIwasinafairyland(仙境)PartⅣSummary巧学助记主动语态变被动语态的原则:“三变”原则:原主变为by短语,原宾变为现主语,谓语主动变被动。“三不变”原则:原句意思不变,原句时态不变,原句主谓宾以外成分不变。核心素养专练Ⅰ.Completethesentenceswiththecorrectformsofthegivenverbs.(WorkbookP68UsingStructuresExercise1)1.Anewlibrary(build)inourschool.Itwillopennextyear.2.Conservationprogrammesforwildanimals(discuss)inAustralianow.3.What(do)inyourtowntoprotectlocalwildlife?4.Dontworry.Measures(take)tostopsuchathingfromhappeningagain.5.I(tell)thatmyIDandpasswordarenotworking.WhatshouldIdonow?6.Mum,mycomputer(fix).CanIuseyoursforawhile?7.Itisbelievedthatmanyplantspecies(threaten)withextinction.Ⅱ.Readandcompletethepassageaboutwildlifeprotectionwiththecorrectverbformsinbrackets.(WorkbookP69UsingStructuresExercise4)Thebalanceofnatureonourplanet(threaten)asalargenumberofspecies(drive)toextinction.Somescientistspredictthathalfofallourplantsandanimalswillbeextinctby2100.Thequestioniswhythesespecies(endanger).Oneofthemainreasonsislossofhabitat.Animalhabitats(destroy)ashumanssearchformorenaturalresourcestoconsume(消费).Moreland(alsouse)forgrowingcropsorkeepinglivestock(家畜).Inaddition,massiveamountsofwaste(produce)byhumans,whicharepollutinganimalhabitats.Harmfulchemicals(create)byhumanactivitiesarebeingreleasedintotheair,water,andsoil.Thewholeofnature(affect)byhumanbeings.However,muchhasbeendoneand(stilldo)tosaveendangeredspecies.Manyprogrammes(design)topreservethepopulationsofendangeredspecies.Inmyopinion,thereisstillhopethathumanscanliveinharmonywithallthingsontheearth.Ⅲ.Makesmallconversationswithyourclassmatesusingthepresentcontinuouspassivevoice.参考答案课堂探究PartⅠ1.HuntersarehuntingAfricanelephants.2.Whatarepeopledoingtohelpthem?3.Whatmeasuresarepeopletakingtohelpthem?Differences:所强调的重点(主语)不同。PartⅡActivity1肯定结构be(am/is/are)+beingdone否定结构be(am/is/are)+not+beingdone一般疑问结构be(am/is/are)+主语+be