Unit5AdelicateworldStartingoutUnderstandingideas課件-高二英語選擇性

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

____________

未能做成某事與…和諧從…移走/去除失控土壤侵蝕對…產(chǎn)生興趣被引入…從…減少到…結(jié)果；因此每一個徹底地；一勞永逸地結(jié)果是，證明是大量的沒有綠色，生命就沒有希望。Withoutgreen,lifehasnohope.(認(rèn)為)應(yīng)該為某人做某事Nor

wouldtheyfailtoimaginehowitsnativeinhabitants,includingroyalpenguins,kingpenguins,andelephantseals,existedinperfectharmonywiththeirnaturalhabitatforthousandsofyears.★

本句為__________結(jié)構(gòu)。句子中nor

為______詞，置于句首。

結(jié)構(gòu)：____________________________________________________________。部分倒裝否定Nor+助動詞

/be動詞

/情態(tài)動詞

+主語

+謂語+其它成分1.他沒有辭職，也沒有被解雇。2.他們那時無法理解這件事，我們也理解不了。Hedidn’tquithisjob,norwashefired.Theycouldn’tunderstanditatthattime,andnorcouldwe.?否定意義的副詞放在句首時，句子要用部分倒裝。類似副詞和短語還有：

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

是形容詞（短語）作___語。

用法：其邏輯主語為句子的主語，是由主語相同的兩個句子改寫而成的。狀1)Wereachedthetopofthemountain.Weweretiredandhungry.

改寫：_______________________________________________.2)Janewassatisfiedwithit.Sheboughtthebookimmediately.

改寫：____________________________________________.Wereachedthetopofthemountain,tire