Unit5AdelicateWorldUsinglanguage課件-高中英語選擇性

ByMr.AbleBook5Unit5AdelicateworldUsinglanguageItasanemptyobjectTolearntheuseof“it”asanemptyobject.Todistinguishtheusageofitasanemptyobjectbyanalysingthesentencesfromreadingpassage.Toanswersomequestionsaboutfoodchainbetweenlivingthings.Tolistentoaconversationaboutbeesandlearnsomeexpressionsfromtheconversation.Totalkaboutwhatwouldhappentotheecosystemifanotherspeciesdiedout.LearningobjectivesWhatdoesitrefertoineachsentenceActivity1Lead-in1．NovisitorwouldthinkitsurprisingthattheislandisaUNESCOWorldHeritageSite.2．Expertsfeltitnecessarytocomeupwithaplantoremovealltherabbitsfromtheisland.3．Thisincidentmadeitclearthattherat,mouseandrabbitproblemneededsolving.4．Thisinterventionisalong,much-delayedendingtoasadstory,butwehumansoweittotheislandtogiveitahappyending.5．Idonotconsideritworthwhilespendingtoomuchtimeontelephoneconversation.6．Shefoundittroublesomehavingtogothroughalltheredtape.7．Youmayrelyonitthathewillcomeintime.8．Idon'tlikeitwhenyoushoutatme.Summary:當(dāng)不定式、動(dòng)名詞或從句在某個(gè)句子中作賓語時(shí)，為了保持句子的結(jié)構(gòu)平衡，常用it作為形式賓語，而將真正的賓語放到句子后部去。Inthesecases,itcarriesnospecificmeaning--it’susedasanemptyobject.Activity2GrammarItasanemptyobject1.動(dòng)詞+it+賓補(bǔ)+不定式/動(dòng)名詞/從句，常見于think,believe,make,

find,

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

等動(dòng)詞后。1.我發(fā)現(xiàn)做好這件事不容易。Ifinditdifficulttodothejobwell.2.我認(rèn)為抱怨是沒有用的。Ithinkitnousecomplaining.3.會(huì)議取消了，我們都感到很遺憾。

Weallthoughtitapitythattheconferenceshouldhavebeencancelled.Translation:2.動(dòng)詞+it+when/if從句，常見于appreciate,enjoy,like,prefer,love,dislike等動(dòng)詞后。1.如果您能幫助我們，我們會(huì)很感激。

Wereally

appreciate

itifyoucoulddousafavour.2.我不喜歡有人嘴里含著食物說話。

Ihate

itwhenpeoplespeakwithfoodinthemouth.Activity2GrammarItasanemptyobjectTranslation:3.動(dòng)詞+it+介詞+that從句，常見于oweittosb.that…

(把……歸功于)，

takeitforgrantedthat…

(認(rèn)為……理所當(dāng)然)，putittosb.that…

(向某人挑明)

，dependon，relyon，seeto（照料；處理），stickto，answerfor（因...而受罰；對...負(fù)責(zé)）等結(jié)構(gòu)中。1.多虧有你，我們現(xiàn)在才仍然活著。

Weoweittoyouthatwearestillalive.2.我還想當(dāng)然地以為他總能隨叫隨到呢。

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(塞罕壩)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/'p?l?n/n.

afinepowderproducedbyflowersnectar/'nekt?/n.

asweetliquidproducedbyflowersandcollectedbybeesfor

makinghoneypollinate/'p?l?ne?t/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.養(yǎng)分,營養(yǎng)物→

(U)n.營養(yǎng)

v.(使)溶解→

n.溶解;解體;解除;終止

n.消費(fèi)者;用戶;顧客→

v.消費(fèi);消耗

adj.不切實(shí)際的→