Unit13We’retryingtosavetheearth!

SectionAGrammarfoucus4a-4cLearningObjectivesBytheendoftheclass,youwillbeableto1.Talkaboutpollutionandlearntoprotecttheenvironment.2.Reviewthekeystructures,distinguishandusethefollowinggrammaticalstructurescorrectly:presentprogressive,usedto,passivevoice,presentperfecttense,modalverbs.TheBrochureofGreenEarth1Whathappenedtotheearth?3Whatshouldwedo?2Whathavewelearned?Part1Watchaviedoandanswerthequestions.1.What’stheproblem?2.Whyistheenvironmentgettingworse?3.Howcanwesavetheearth?Part1Answerthequestions.1.What’stheproblem?2.Whyistheenvironmentgettingworse?3.Howcanwesavetheearth?Theearthissufferingfrompollution.Theriverusedtobecleanbutitisdirtynow.Humanactivitieshaveproducedalotofrubbish.Theairisbadlypolluted.Weshouldreducethewasteandsaveenergy.1.Theearthissufferingfrompollution.2.Theriverusedtobecleanbutitisdirtynow.3.Humanactivitieshaveproducedalotofrubbish.4.Theairisbadlypolluted.5.Weshouldreducethewasteandsaveenergy.Part1Let’sreview.issuffering現(xiàn)在進(jìn)行時(shí)usedtodo現(xiàn)在完成時(shí)

被動(dòng)語態(tài)

情態(tài)動(dòng)詞usedtohaveproducedisshouldpolluted現(xiàn)在進(jìn)行時(shí)(Presentprogressive)

1.Theearthissufferingfrompollution.2.Look!Myfriendsareplayingsoccer.3.IamhavinganEnglishclassnow.現(xiàn)在進(jìn)行時(shí)定義結(jié)構(gòu)標(biāo)志詞表示說活時(shí)正在進(jìn)行的動(dòng)作；也表示目前或現(xiàn)階段一直進(jìn)行的動(dòng)作。be(am/is/are)+vinglook,listen,now....issufferingareplayingamhavingbe+doingmakesavewatchbuyputswimbeginstaytakecutseedraw寫出下列單詞的現(xiàn)在分詞.makingsavingwatchingbuyingputtingswimmingbeginningstayingtakingcuttingseeingdrawing動(dòng)詞現(xiàn)在分詞的變化規(guī)則1.V-ing2.去e+ing3.重讀閉音節(jié)雙寫尾字母+ingActivity1現(xiàn)在完成時(shí)(Presentperfect)

1.Humanactivitieshaveproducedalotofrubbish.2.Manypeoplehaveheardofsharkfinsoup.現(xiàn)在完成時(shí)定義結(jié)構(gòu)標(biāo)志詞表示動(dòng)作已經(jīng)完成，但對現(xiàn)在造成影響；或表示從過去某一時(shí)間開始一直延續(xù)到現(xiàn)在并且還可能持續(xù)下去的動(dòng)作。have/has+done(動(dòng)詞的過去分詞)already,yet,ever,never,since,for....haveproducedhaveheardworkwatchsavestopnodstudybeginstaytakecutseedrawworkedwatchedsavedstoppednoddedstudiedbegunstayedtakencutseendrawnActivity2寫出下列單詞的過去分詞.動(dòng)詞過去分詞的變化規(guī)則1.V-ed2.以e結(jié)尾+d3.重讀閉音節(jié)雙寫尾字母+ed4.輔音字母加y結(jié)尾，變y為i+ed5.不規(guī)則變化usedtodosth.Theriverusedtobecleanbutitisdirtynow.usedto+V原形

過去常常做某事Theriver____________beclean.（變否定句）____theriver_______beclean?（變一般疑問句）Yes,it_____./No,it______.didn’tusetoDidusetodiddidn’tActivity31.她過去常常周末和朋友閑逛She________________withfriendsonweekends.2.他過去不常熬夜。He_________________________atnight.3.Markusedtobeafraidofgods.（變一般疑問句）__________________________________usedtohangoutdidn’tusetostayuplateDidMarkusetobeafraidofdogs?被動(dòng)語態(tài)(Passivevoice)Theairisbadlypolluted.Manytreeswerecutdown.Moreworkwillbedonetoprotecttheenvironment.Thesharksshouldbesaved.ispollutedwerecutshouldbesavedwillbedone一般現(xiàn)在時(shí)被動(dòng)語態(tài)一般過去時(shí)被動(dòng)語態(tài)情態(tài)動(dòng)詞被動(dòng)語態(tài)一般將來時(shí)被動(dòng)語態(tài)am/is/are+動(dòng)詞的過去分詞was/were+動(dòng)詞的過去分詞willbe+動(dòng)詞的過去分詞情態(tài)動(dòng)詞+be+動(dòng)詞的過去分詞情態(tài)動(dòng)詞(Modalverbs)Weshouldreducethewaste.Theenvironmentmightbecomebetter.shouldmight1.情態(tài)動(dòng)詞+動(dòng)詞原形2.情態(tài)動(dòng)詞通常沒有人稱和數(shù)的變化3.常見的情態(tài)動(dòng)詞有：can/could,may/might,should,would,must等Part2Whathavewelearned?GrammarfocusWe__________tosavetheearth.(try)PresentprogressiveTheriver__________soclean.(be)usedtoTheair____badly________.(pollute)PassivevoiceNoscientificstudies__________thatsharkfinsaregoodforhealth.(show)PresentperfectWeshould_______savethesharks.(help)Modalverbsaretryingusedtobeispollutedhaveshownhelp用括號(hào)中所給詞的正確形式填空1.Thegirls__________(dance)intheclassroomnow.2.It’s5o’clocknow.Mike__________(have)dinner.3.I__________(live)heresince1995.4.He__________(work)inBeijingfortwoyears.5.Anewhighwayinmyhometown___________(build)nextyear.Activity5aredancingishavinghavelivedhasworkedwillbebuiltActivity61.--_____youpassmeapen?I’dliketowritedownthenumber.--Sure.Hereitis.A.CanB.MustC.Might2.--MayIgotothecinema,Mom?--Certainly,butyou_____bebackby11o’clock.A.canB.mustC.might3.--Excuseme.IsthistherightwaytotheSummerPalace?--Sorry,I’mnotsure.Butit_____be.A.canB.mightC.mustn’tABBFillintheblankswiththecorrectformsoftheverbsinbrackets.4a________youever________(take)partinanenvironmentalproject?Yes,Ihave.I________(help)withaClean-UpDaylastyear.Itwas________(consider)thebiggestclean-upprojectthiscity________ever________(have).Howmanypeople________(take)part?I________(think)morethan1,000people________(come)tohelpout.That’sfantastic!Iguesseveryoneinthiscityis________(try)toimprovetheenvironment.Yes,wecan’taffordto________(wait)anylongertotakeaction!Joe:Ken:Joe:Ken:Joe:Ken:HavetakenhelpedconsideredhadhadtookthinkcametryingwaitFillintheblankswiththeappropriatemodalverbsfromthebox.4bPeople________thinkthatbigthings________bedonetosavetheearth.Manyforgetthatsavingtheearthbeginswithsmallthings.Forexample,you________saveelectricitybyturningoffthelightswhenyouleavearoom.You________alsousereusablebagsinsteadofplasticbags.Ithinkit’sagreatideathatyounow________payforplasticbagsinsomestores.Andinsteadofdrivingtoschoolorwork,you________rideyourbikeorwalk.Ifit’sfar,you________takethebus.Allthesesmallthings________addupandbecomebigthingsthat________improvetheenvironment.Let’stakeactionnow!canwouldcouldhavetoshouldmustmay/mightWhichisthemainideaofthepassage?A.Peoplecandobigthingstosavetheearth.B.Savingtheearthbeginswithsmallthings.C.Plasticbagsshouldbeforbiddeninstores.Fillintheblankswiththeappropriatemodalverbsfromthebox.4bPeople________thinkthatbigthings________bedonetosavetheearth.Manyforgetthatsavingtheearthbeginswithsmallthings.Forexample,you________saveelectricitybyturningoffthelightswhenyouleavearoom.You________alsousereusablebagsinsteadofplasticbags.Ithinkit’sagreatideathatyounow________payforplasticbagsinsomestores.Andinsteadofdrivingtoschoolorwork,you________rideyourbikeorwalk.Ifit’sfar,you________takethebus.Allthesesmallthings________addupandbecomebigthingsthat________improvetheenvironment.Let’stakeactionnow!canwouldcouldhavetoshouldmustmay/mightmightmustshouldshouldhavetocancancouldwouldPart3Whatshouldwedo?Makealistofthingsthatpeoplecandotohelptheenvironmentanddiscussyourlistwithyourpartner.4c1.usepublictransportation2.growmoreplants3.turnoffthelightswhenyouleavetheroom4.takeyourownshoppingbagsTipsPairworkIthinkthateveryoneshouldusepublictransportation.Idisagree.It’sdifficultforparentswithyoungchildrentousepublictransportation.Wecangrowmoreplants.It’sagoodidea.Wecanalsoturnoffthelightswhenweleavetheroom.Iagreewithyou.Ibelieveouractionscanleadtoabetterfuture.You’reright.Let’sstartnow!Part3Whatshouldwedo?1.Icanusethepresentprogressive,usedto,passivevoice,presentperfecttense,modalverbscorrectly.2.Iplayedanactivepa