Unit5ADelicateWorldUsinglanguage课件-高中英语选择性

Unit5AdelicateworldItasanemptyobjectTolearntheuseof“it”asanemptyobjectTolearntodescribethechangesusing“it”asanemptyobjectLookatthesentencesandanswerthequestions.Sentences(a)and(c)arefromthereadingpassage.1a

NovisitorwouldthinkitsurprisingthattheislandisaUNESCOWorldHeritageSite.b

NovisitorwouldthinkthattheislandbeingaUNESCOWorldHeritageSiteissurprising.c

Expertsfeltitnecessarytocomeupwithaplantoremovealltherabbitsfromtheisland.d

Expertsfelttocomeupwithaplantoremovealltherabbitsfromtheislandwasnecessary.1.Whatdoes“it”refertoinsentences(a)and(c)?Itreferstothatclauseinsentence(a)andan

infinitiveinsentence(c).2.Whatisthedifferencebetweenthesentencesineachgroup?Whentheobjectofasentenceisathat-clause(b)oraninfinitive(d),wesometimesuse“it”asanemptyobjectandputtherealobjectlatertokeepbalance.Forexample,sentence(a)uses“it”astheemptyobjectof“think”,referringtotherealobject:“theislandisaUNESCOWorldHeritageSite”.Sentence(b)usesthat-clauseastheobjectof“think”.Nowlookformoresentenceswiththisstructureinthereadingpassage,andsummariseitsuseinyourownwords.Thisincidentmadeitclearthattherat,mouseandrabbitproblemneededsolvingonceandforall.…butwehumansoweittotheislandtogiveitahappyending.it作形式宾语的常见情况归纳如下：1.it代替不定式短语。常用于：think/find/feel/consider/make/regard...it+adj./n.+todoIfinditpleasanttoworkwithhim.Theyfeltitdifficulttofinishtheworkinsuchashorttime.Shethinksitherdutytohelphim.Allthesenoisesmadeitimpossibleformetogoonwiththework.2.it代替ing只限于少数句型。

consider/think/find...it+good/use/worthwhile...+doing...Theprofessorconsidersitnogoodreadingwithoutunderstanding.Doyouconsideritanyusearguingwithhim?Idon’tthinkitworthwhilegoingtosuchaplace.3.it代替宾语从句(that有时候可以省略)。think/find/make...it+n./adj.+ObjectClause...it作形式宾语还有几种特殊情况，归纳如下：动词+it+that从句，常见于put,have,take等动词后。e.g.Itakeitthathewillfinishthetaskbyhimself.动词+it+when/if从句，常见于appreciate,enjoy,like,prefer等动词之后。e.g.Wereallyappreciateitifyoucoulddousafavour.动词+it+介词短语+that从句，常见于oweittosb,takeitforgranted等结构中。动词+介词+it+that从句，常见于lookto,dependon,insiston,stickto,answerfor等结构中。e.g.*Sheinsistedonitthatshewasinnocent.*Youmaydependonitthathewillhelpyou.e.g.*Hemadeitknowntoeveryonethathewasright.

*Theyhaven’tmadeitknownwheretheyaretoholdtheconference.动词+it+过去分词+从句。根据括号内的汉语提示并用it作形式宾语补全下面句子。1._______________________(我认为那很重要)tofindapart-timejob.2._______________________________(新技术使之成为可能)toachieveabalancebetweeneconomicdevelopmentandecosystems.IconsideritimportantNewtechnologiesmakeitpossible3._______________________(他们觉得很困难)torecovertheoriginalecosysteminsuchashorttimelastyear.4.______________________________________(你为何不让人们引起注意)thatouractions,nomatterhowsmalltheymaybe,makeadifferencetonature?Theyfeltitverydifficult

Whydon'tyoubringittopeople'sattentionRewritetheunderlinedpartsusingitasanemptyobject.Thered-earedslider,aspeciesoffreshwaterturtle,isnativetotheSouthernUnitedStatesandNorthernMexico.Duetoitscuteappearance,manypeoplethinkkeepingthisturtleasapetisagoodidea.manypeoplethinkitagoodideatokeepthisturtleasapet.2Recentyearshaveseenmoreandmorepetslidersescapingorbeingreleasedfromhomes,andsomeownersbelievetoreleasethemintothewildisnobigissue.believeitnobigissuetoreleasethemintothewildThesedays,peoplehavefoundtoreleasetheseturtlesintothewildisathreattootherspecies.peoplehavefounditathreattootherspeciestoreleasetheseturtlesintothewildExpertsconsiderownerskeepingtheirpetsinanenclosedareaimportant,andanyoneunabletokeeptheirpetsshouldtakethemtoanappropriateanimalshelter.ExpertsconsideritimportantforownerstokeeptheirpetsinanenclosedareaLookatpicturesofSaihanbaNationalForestParkandfindoutthechanges./3LocatedinChengdeCity,HebeiProvince,Saihanba(塞罕坝)sits450kilometerstothenorthofBeijing.Theplaceiscoveredwithsnowsevenmonthsayear.Itusedtobeafreezing,barrendesertplaguedbysandstorms.However,ithasbeenturnedintotheworld’slargesthuman-madeforestthatcoversanareaofnearly75,000hectares.Thus,itiscalleda“greenmiracle.”LookatthepicturesoftheSaihanbaNationalForestParkanddescribeitschangesusingitasanemptyobjectwhereappropriate.Youmayrefertothewordsandexpressionsinthetableforhelp.nouns/adjectivestodo/thatbreakthroughimpossiblelikelyunrealistic...growinvestigateplanttreestransform...Ithinkitabreakthroughtotransformadesertintoaforest...Ithinkitimpossibletogrowtreesthereinthe1960s.IthinkitunrealistictoplanttreesinthedesertwhentheworkersfirstcametoSaihanba.根据汉语意思，补全下列句子（每空一词）。1.我们认为提高公众保护海洋野生动物的意识非常重要。Weconsider___________________________________thepublic'sawarenessofsavingoceanwildlife.2.你认为顾客们有可能不使用塑料瓶和塑料袋吗？Doyouthink__________________forcustomersnot____________________plasticbottlesandbags?itvitaltoraise

itpossible

touse

3.如果人人都能参与这次回收计划，我们会很感激。________________________________