Unit5AdelicateworldStartingoutUnderstandingideas课件-高二英语选择性

Unit5ADelicateWorldStartingoutArewehumansaloneonthisbeautifulplanetIfonespeciesgoextinct,willthataffectusAbsolutely!Weandotherlivingthings,suchasplants,animals,insectsarelivingonthisplanettogether!Wedependoneachothertosurvive.That’showecosystemworks!Watchthevideoandanswerthequestions.1.ArehumanspartofEarth’secosystemsWhy2.Inwhatwayscanhumansaffectecosystems______.Humansarepartof_________________.Becauseallthelivingthingslivein___________andpeopleare____________YesecosystemslivingthingsEarth’secosystemsHumanscanaffectecosystemsin__________________ways.Forexample,tohaveapositiveinfluenceonecosystems,peoplecan______________,_______________________,____________etc.However,______________,__________________and____________affectecosystemsinanegativeway.positiveandnegativeplanttreesdeforestationfeedandprotectanimalsrecyclethingsairandwaterpollutionexcessivewasteLookatthesatelliteimagesandanswerthequestions.1.Whatishappeningtotheareaaccordingtothesatelliteimages2.Whatdoyouthinkalatersatelliteimagewouldshow3.WhatdoyouthinkcausedthesechangesAralSeaisbecomingsmallerandsmaller/shrinking.Asmallerone.Maybeitwouldnotbeabletoshowanything.Climatechange,Environmentalpollution,People’sactivities…Unit5ADelicateWorldUnderstandingideaAnimalsinthepictures

birdspenguinsWhatkindofchangeswouldtakeplaceifcats,ratsandrabbitswereintroducedtoanenvironmentlikethisTheywouldhuntthebirdsandeatthenativevegetation,thusupsettingthelocalecologicalbalance.ReadthepassageandfindoutwhathappenedtoMacquarieIsland.Non-nativespeciesintroducedtoMacquarieIslandattackednativebirds,andledtoasubstantialreductionofbirdpopulationandeventheextinctionofparakeets.Inaddition,non-nativespeciesateanddevastatedthenativevegetation.Allofthisplayedapartinupsettingthenaturalharmonyoftheisland.Butnowtheisland’secologyisontheroadtorecoverywithhumanefforts.Lookthroughthepassage,divideitintothreeparts,andgetthemainideaofeachpart.Part1Para_____ theb_______oftheislandPart

2Paras_____ thec_______oftheislandPart3Paras_____

thec______________oftheisland

1eauty2-3haos4-6onservationMacquarieIsland:fromChaostoConservationFromwhataspectsdoesthewriterintroducetheislandinpara.1L________S________L________I________ocationhapenhabitantsandscapeInthe________________

ocean,________betweenAustraliaandAntarctic.South-westPacifichalfwaylongandthinWhyStrongwindsandstormyseassculpteditsshape.Greengrass;barerock;awildandnatural

beautyroyalpenguins;kingpenguins;elephantsealsOrganiseinformationfromthepassageandcompletetheflowchart.eatingthebirds’eggsandattackingbabybirdstheytookovertheisland,Catswerebroughttotheisland.in1810Thecatsdevelopedanappetiteforthebirds.Rabbitswereintroducedtotheisland.Toprovidefoodforhumans.morerabbitsmeansmorecatsMorecatshuntedthebirdsandparakeetsdiedout.Aviruswasreleasedontotheisland.Trapsanddogswereused.Poisonanddogswereused.Toremovealltherabbitsfromtheisland.Tocatchthecats.Toremovealltheremaininginvadingspecies.Theislandispest-freeanditsecologyisontheroadtorecovery.Substantialreductionofrabbitpopulationledtocatskillingmorenativebirds.Thepopulationofratsandmiceincreased.in1970sin1980sin2000Therabbitpopulationexplodedonceagain.Choosetheauthor’spurposeinwritingthepassageandgiveyourreasons.1.ToanalysehowMacquarieIslandwassavedfromdestruction.2.ToinformreadersofthechaoscausedonMacquarieIslandbyhumans.3.ToentertainreaderswithafunnystoryaboutwhathappenedonMacquarieIsland.4.Tosuggestwaysinwhichanecosystemcanbeprotected.Whatdoyouthinkis

toblameforthechaosinMacquarieIsland?DeeperthinkingItis

wehumans

that

aretoblamefortheecologicalproblemwiththeisland,wemustshouldertheresponsibilitytomakeeffortstorecoveritsecology.1.failtodosth ____________2.inharmonywith

____________3.developanappetitefor

____________4.beintroducedto

____________

5.soilerosion

____________6.outofcontrol

____________7.remove…from

____________8.decreasefrom…to

____________9.inconsequence

____________10.turnout

____________11.asubstantialnumberof

____________12.onceandforall

____________13.everylast

____________14.oweittosbtodosth

____________

未能做成某事与…和谐从…移走/去除失控土壤侵蚀对…产生兴趣被引入…从…减少到…结果；因此每一个彻底地；一劳永逸地结果是，证明是大量的没有绿色，生命就没有希望。Withoutgreen,lifehasnohope.(认为)应该为某人做某事Nor

wouldtheyfailtoimaginehowitsnativeinhabitants,includingroyalpenguins,kingpenguins,andelephantseals,existedinperfectharmonywiththeirnaturalhabitatforthousandsofyears.★

本句为__________结构。句子中nor

为______词，置于句首。

结构：____________________________________________________________。部分倒装否定Nor+助动词

/be动词

/情态动词

+主语

+谓语+其它成分1.他没有辞职，也没有被解雇。2.他们那时无法理解这件事，我们也理解不了。Hedidn’tquithisjob,norwashefired.Theycouldn’tunderstanditatthattime,andnorcouldwe.♥否定意义的副词放在句首时，句子要用部分倒装。类似副词和短语还有：

never,seldom,little,few,rarely,nowhere,notuntil,hardly…when,nosooner…than,notonly…butalso,innoway,bynomeans,undernocircumstancesetc.1)Never

beforehaveIseensuchamovingfilm.2)Bynomeanswillwegiveup.3)HardlyhadIenteredtheclassroomwhenthebellrang.2.Looseontheisland,theydidwhatrabbitsdobest–theymultipliedrapidlyandbeganeatingthenativevegetationanddiggingholes,whichcausedsoilerosion.★

Looseontheisland

是形容词（短语）作___语。

用法：其逻辑主语为句子的主语，是由主语相同的两个句子改写而成的。状1)Wereachedthetopofthemountain.Weweretiredandhungry.

改写：_______________________________________________.2)Janewassatisfiedwithit.Sheboughtthebookimmediately.

改写：____________________________________________.Wereachedthetopofthemountain,tire