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

Unit3WildlifeProtectionDiscoveringUsefulStructuresTeachingobjectives:Bytheendofthisperiod,youwillbeableto…1.knowaboutthestructureofthepresentcontinuouspassivevoiceanditsfunction.2.mastertheusageofthepresentcontinuouspassivevoice.3.usethepresentcontinuouspassivevoiceflexiblyintherealcontext.1.Africanelephantsarebeinghunted.→_______________________________________2.Whatisbeingdonetohelpthem?→_______________________________________3.Whatmeasuresarebeingtakentohelpthem?→_________________________________________Differences：________________________________ObserveandanalyzeUnderlinethepresentcontinuouspassivevoice,changethemintoactivevoiceandcomparethedifferencesinmeaning.所强调的重点（主语）不同。HuntersarehuntingAfricanelephants.Whatarepeopledoingtohelpthem?Whatmeasuresarepeopletakingtohelpthem?濒危动物猎人事件人们措施大家Summarizethestructureofthepresentcontinuouspassivevoice.Structure&Function肯定结构_____________________________否定结构_____________________________一般疑问结构_____________________________特殊疑问结构______________________________be(am/is/are)＋beingdonebe(am/is/are)＋not＋beingdonebe(am/is/are)＋主语＋beingdone特殊疑问词＋be(am/is/are)＋主语＋beingdone1.Mysisterisnowbeinginterviewed.Function:__________________________________2.Manyinterestingexperimentsarebeingcarriedoutthesedays.Function:_________________________________________________________________3.Heisalwaysbeingpraisedbytheleader.Function:________________________________________________________________________________________________________4.Acelebrationisbeingheldthisweekendforhissuccess.Function:______________________________________________Observethefollowingsentencesandfigureoutthefunctionofthepresentcontinuouspassivevoice.Structure&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。有时可表示按计划或安排将要进行的一个被动动作。表示此时此刻正在进行的被动动作。表示现阶段正在进行的被动动作(该动作在说话的瞬间未必正在进行)。这种用法常常带有赞扬或厌恶的感情色彩。表示一种经常性的被动行为，常和always,constantly等表示频度的副词连用，Choosethesuitableverbformstocompletethesentences.Consolidation1.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.Consolidation1.Thezooisopeninganewareaforthetwobabyelephants.→________________________________________________________________2.Thedoctorsarenotexaminingthepatient.→________________________________________________________________3.Theyareraisingmorefundsforresearchintowildlifeprotection.→________________________________________________________________4.Thecityissettingupanewnaturereserveforendangeredanimals.→________________________________________________________________5.Todaywearecompletingourwritingtaskonline.→________________________________________________________________Rewritethesentencesusingthepresentcontinuouspassivevoice.Todayourwritingtaskisbeingcompletedonline.Anewareaisbeingopenedfortheatwobabyelephants(bythezoo).Thepatientisnotbeingexamined(bythedoctors).Morefundsarebeingraisedforresearchintowildlifeprotection.Anewnaturereserveisbeingsetupforendangeredanimalsin/bythecity.ConsolidationInthewetlandofmyhometown,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?Finishthefollowingpassagewiththepresentcontinuouspassivevoiceoftheverbsinbrackets.isbeingpollutedarebeingcaughtarebeingsoldarebeingkilledisbeingdestroyedarebeingcoveredConsolidationHello,everyone!I'vejustcomebackfromawonderfultriptoTibet.Itwassobeautifultherethat______.Thescenerywassoimpressiveandtheairwassofreshandclean._________.However,_______.Cans,_________astheypassthroughTibet.Iworryabouttheeffectthiswillhaveonthelocalwildlife._________.Weshouldallthinkaboutthis.A.Visitorsarebeingtoldtopaymoreattentiontoprotectingtheenvironment.B.thisbeautifulcountrysideisbeingspoiledbycarelessvisitorsC.paperandplasticbagsarestillbeingthrownawaybymanytourgroupsD.Howcanwemakevisitorsmoreawareofthedamagethatisbeingdonetotheenvironment?E.IfeltIwasinafairyland(仙境)Completethespeechwiththecorrectsentencesorclauses.Thendiscusspossiblesolutionsingroups.EABCDSummary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。I.Finishtheexercisesontheworksheet.（onWorkbookP68-69）.II.Makesmallconversationswithyourclassmatesusingthepresentcontinuouspassivevoice.