Unit5AdelicateWorldUsinglanguage课件-高中英语选择性

ByMr.AbleBook5Unit5AdelicateworldUsinglanguageItasanemptyobjectTolearntheuseof“it”asanemptyobject.Todistinguishtheusageofitasanemptyobjectbyanalysingthesentencesfromreadingpassage.Toanswersomequestionsaboutfoodchainbetweenlivingthings.Tolistentoaconversationaboutbeesandlearnsomeexpressionsfromtheconversation.Totalkaboutwhatwouldhappentotheecosystemifanotherspeciesdiedout.LearningobjectivesWhatdoesitrefertoineachsentenceActivity1Lead-in1．NovisitorwouldthinkitsurprisingthattheislandisaUNESCOWorldHeritageSite.2．Expertsfeltitnecessarytocomeupwithaplantoremovealltherabbitsfromtheisland.3．Thisincidentmadeitclearthattherat,mouseandrabbitproblemneededsolving.4．Thisinterventionisalong,much­delayedendingtoasadstory,butwehumansoweittotheislandtogiveitahappyending.5．Idonotconsideritworthwhilespendingtoomuchtimeontelephoneconversation.6．Shefoundittroublesomehavingtogothroughalltheredtape.7．Youmayrelyonitthathewillcomeintime.8．Idon'tlikeitwhenyoushoutatme.Summary:当不定式、动名词或从句在某个句子中作宾语时，为了保持句子的结构平衡，常用it作为形式宾语，而将真正的宾语放到句子后部去。Inthesecases,itcarriesnospecificmeaning--it’susedasanemptyobject.Activity2GrammarItasanemptyobject1.动词+it+宾补+不定式/动名词/从句，常见于think,believe,make,

find,

consider,feel,take,support,regard...

等动词后。1.我发现做好这件事不容易。Ifinditdifficulttodothejobwell.2.我认为抱怨是没有用的。Ithinkitnousecomplaining.3.会议取消了，我们都感到很遗憾。

Weallthoughtitapitythattheconferenceshouldhavebeencancelled.Translation:2.动词+it+when/if从句，常见于appreciate,enjoy,like,prefer,love,dislike等动词后。1.如果您能帮助我们，我们会很感激。

Wereally

appreciate

itifyoucoulddousafavour.2.我不喜欢有人嘴里含着食物说话。

Ihate

itwhenpeoplespeakwithfoodinthemouth.Activity2GrammarItasanemptyobjectTranslation:3.动词+it+介词+that从句，常见于oweittosb.that…

(把……归功于)，

takeitforgrantedthat…

(认为……理所当然)，putittosb.that…

(向某人挑明)

，dependon，relyon，seeto（照料；处理），stickto，answerfor（因...而受罚；对...负责）等结构中。1.多亏有你，我们现在才仍然活着。

Weoweittoyouthatwearestillalive.2.我还想当然地以为他总能随叫随到呢。

Ijusttookitforgrantedthathe’dalwaysbearound.Activity2GrammarItasanemptyobjectTranslation:1.Iwouldappreciate______ifyoucouldletmeknowinadvancewhetherornotyouwillcome.2.Susanmade_____cleartomethatshewishedtomakeanewlifeforherself.3.Wefeelitourduty________(make)ourcountryabetterplace.4.Ifindithard______metogetonwellwithmyclassmates.5.Ithinkitnouse________(talk)aboutitwiththem.6.Wefinditessential______weshouldlearntospendmoneywisely.7.Therightlevelofbackgroundnoisemayinterruptournormalpatternsofthinkingjustenoughtoallowourimaginationstowander,withoutmakingitimpossible________(focus).itittomakefortalkingthattofocusActivity3ExercisesTask1:Fillintheblanks.Task2:Rewritetheunderlinedpartsusingitasanemptyobject.(Ex2)Thered-earedslider,aspeciesoffreshwaterturtle,isnativetotheSouthernUnitedStatesandNorthernMexico.Duetoitscuteappearance,manypeoplethinkkeepingthisturtleasapetisagoodidea.Recentyearshaveseenmoreandmorepetslidersescapingorbeingreleasedfromhomes,andsomeownersbelievetoreleasethemintothewildisnobigissue.Thesedays,peoplehavefoundtoreleasetheseturtlesintothewildisathreattootherspecies.Expertsconsiderownerskeepingtheirpetsinanenclosedareaimportant,andanyoneunabletokeeptheirpetsshouldtakethemtoanappropriateanimalshelter.Activity3ExercisesmanypeoplethinkitagoodideatokeepthisturtleasapetbelieveitnobigissuetoreleasethemintothewildpeoplehavefounditathreattootherspeciestoreleasetheseturtlesintothewildExpertsconsideritimportantthatownersshouldkeeptheirpetsinanenclosedareaLocatedinChengdeCity,HebeiProvince,Saihanba(塞罕坝)sits450kilometerstothenorthofBeijing.Theplaceiscoveredwithsnowsevenmonthsayear.Itusedtobeafreezing,barrendesertplaguedbysandstorms.However,ithasbeenturnedintotheworld’slargesthuman-madeforestthatcoversanareaofnearly75,000hectares.Thus,itiscalleda“greenmiracle.”Task3:LookatthepicturesandreadabouttheSaihanbaNationalForestPark.(Ex3)Activity3ExercisesTask3:LookatthepicturesoftheSaihanbaNationalForestParkanddescribeitschangesusingitasanemptyobjectwhereappropriate.Youmayrefertothewordsandexpressionsinthetableforhelp.(Ex3)Activity3ExercisesIthinkitabreakthroughtotransformadesertintoaforest…ByMr.AbleBook5Unit5AdelicateworldUsinglanguageEcosystemsLookatthediagramandanswerthequestions.(Ex5)Activity1ReadingQ1.WhatdoesthediagramshowQ2.WhataretherelationshipsbetweenthelivingthingsThediagramshowsafoodchain.Thelivingthingsarecloselyconnectedwith

eachotherbythefoodtheyeat.Secondaryconsumers

preyon

primaryconsumers,primaryconsumers

feedon

producers,andproducers

absorblightfromthesun,andwateranddissolvednutrientsfromthesoil,whichareprovidedbydecomposers.Q2.WhataretherelationshipsbetweenthelivingthingsCompletethepassagewiththecorrectformofthewordsandexpressionsinEx5.(Ex6)Inawoodlandecosystem,treesandotherplantsareproducers.They

1

________

water,takeinnutrientsfromthesoil,andenergyfromthesun.Insectsareanexampleofaprimaryconsumer.They2

_________

theproducerstoprovidefoodforthem,andare3

________bysecondaryconsumers:smallmammalsandbirds.They4__________theprimaryconsumers.Worms,fungiandbacteriaaredecomposers.They5

__________animalwasteandtheremainsoflivingthings.Thechemicalsthesedecomposers6

_______fertilisethesoilandgivetheplantsthenutrientstheyneedtogrow.absorbrelyonfedonpreyonbreakdownreleaseActivity1ReadingHowmuchdoyouknowaboutbeesOneoftheoldestspeciesintheecosystem,the

honeybeehasbeeninexistenceformillionsofyears.Ahoneybeecanflyasfastas24kilometresperhour

andits

wingscanbeat200timespersecond.Injustonejourneytocollectpollen

andnectar,onesinglehoneybeecanpollinateasmanyas50to100

flowers.pollen/'pɒlən/n.

afinepowderproducedbyflowersnectar/'nektə/n.

asweetliquidproducedbyflowersandcollectedbybeesfor

makinghoneypollinate/'pɒlɪneɪt/v.

toputpollenintoaflowerorplantsothatitproducesseeds

pollinationn.Activity2

Pre-listeningDidYouKnowListentotheconversationandchoosethetruestatements.(Ex7)1.Beesareveryimportanttoourfoodsupplybecausethey

providehoney.2.Thebeepopulationisdeclining.3.Withoutbees,humanswoulddieout.4.Allhumancropsdependonbeesforpollination.5.Ifbeesbecameextinct,otherinsectscouldpollinateenoughcrops.6.Humansareresponsibleforthedeclineinthebeepopulation.✔✔✔Activity3

ListeningListenagainandcompletetheflowchart.(Ex8)pesticidesandclimatechangedecliningveryquicklyhavefallenby17%beunabletoreproduceOtherinsectsbeesareresponsibleforpollinatingabout70%woulddieoutActivity3

ListeningMeg:HeyOllie,haveyouheardthatthebeepopulationis___________Ollie:No,Ihaven't.But,thinkingaboutit,Ihardlyeverseebeesthesedays.WhenIwas little,theyseemedtobeeverywhere!Meg:Ifbeesdieout,humanswilldieouttoo.Ollie:What!Youmustbekidding!Idon'tbelieveit!Meg:It'safact!!Iwatchedanaturedocumentaryallaboutittheotherevening.Beesare veryimportanttoourfood__________.Ollie:HowcanthatbepossibleHumanswon'tdieoutjustbecausethere'snohoney!Meg:Beesdon'tjustmakehoney.Don'tforgetthatbeesarealsoresponsiblefor___________ plants.Withoutthem,cropswouldbeunabletoreproduce.Ollie:Butsurelythereareotherwaysofgettingthesecropstoreproduce.Doesithavetobe beesMeg:Well,thereareotherinsectsthatpollinateplants,butit'sunlikelythattheywouldbeable tofully___________________thelossofbees.Beesareresponsibleforpollinating about70%ofthespeciesofcrops.Listenagainandcompletethetapescript.Activity3

ListeningdecliningsupplypollinatingcompensateforOllie:AreyousureaboutthatdataItsoundsrather_______________.Meg:Watchthedocumentaryandcheckitoutforyourselfifyoudon'tbelieveme.Without bees,_____________plantspecieswoulddieout.Animalsthatliveonthecropswould dieout,andwewouldn'thaveenoughtoeat.Ollie:SeriouslyThat'sscary!Butlookingonthebrightside,therearemillionsandmillions ofbees.They'renotgoingtodieoutanytimesoon.Meg:I'mafraidyou'rewrong.Thebeepopulationisdecliningveryquickly.Accordingto statistics,beenumbersintheUShavefallen_____17%injustoneyear.Ollie:Gosh!WhatcausedthatMeg:Acombinationofthings,really,butit'smainlyduetodamagetotheir______________ causedbypesticidesandclimatechange.Ollie:SohumanactivityisthemaincauseMeg:That'sright.Ollie:Well,inthatcase,we'dbetterdosomethingbeforeit'stoolate.exaggeratednumerousbyhabitatsActivity4

WatchingCompletetheboxeswiththeexpressionsfromtheconversation.Youmustbekidding! •Areyousureabout...Idon’tbelieveit! •Checkitoutforyourself...It’safact! •Accordingtostatistics...Don’tforgetthat…ExpressingdoubtRespondingtodoubt

•Youmustbekidding!•Idon’tbelieveit!•Areyousureabout...•It’safact!•Don’tforgetthat…•Checkitoutforyourself...•Accordingtostatistics...Activity5

SpeakingWorkinpairs.Talkaboutwhatwouldhappentotheecosystemifanotherspecies,likebees,diedout.Usethewordsandexpressionsinthissection.Activity5

SpeakingOwlConsumerSnakeconsumerFood

ChainFrogconsumerGrasshopperconsumerPlantsproducerActivity6

Revision

(C)n.养分,营养物→

(U)n.营养

v.(使)溶解→

n.溶解;解体;解除;终止

n.消费者;用户;顾客→

v.消费;消耗

adj.不切实际的→