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)?aNovisitorwouldthinkitsurprisingthattheislandisaUNESCOWorldHeritageSite.cExpertsfeltitnecessarytocomeupwithaplantoremovealltherabbitsfromtheisland.Itreferstothatclauseinsentence(a)andan

infinitiveinsentence(c).“It”insentence(a)refersto“theislandisaUNESCOWorldHeritageSite”.“It”insentence(c)refersto“to

comeupwithaplantoremovealltherabbitsfromtheisland.”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作形式賓語的常見情況歸納如下：1.it代替不定式短語。常用于：think/find/feel/consider/make/regard...it+adj./n.+todoIfinditpleasanttoworkwithhim.Theyfeltitdifficulttofinishtheworkinsuchashorttime.Shethinksitherdutytohelphim.Allthesenoisesmadeitimpossibleformetogoonwiththework.2.it代替v.-ing只限于少數(shù)句型。

consider/think/find...it+good/use/worthwhile...+doing...Theprofessorconsidersitnogoodreadingwithoutunderstanding.Doyouconsideritanyusearguingwithhim?Idon’tthinkitworthwhilegoingtosuchaplace.3.it代替賓語從句(that有時候可以省略)。think/find/make...it+n./adj.+ObjectClause...Weallthoughtitapitythattheconferencewascancelled.Theykeptitquietthathewasdead.Hehasn’tmakeitclearwhenheiscomingback.it作形式賓語還有幾種特殊情況，歸納如下：動詞+it+that從句，常見于put,have,take等動詞后。e.g.Itakeitthathewillfinishthetaskbyhimself.動詞+it+when/if從句，常見于appreciate,enjoy,like,prefer等動詞之后。e.g.Wereallyappreciateitifyoucoulddousafavour.e.g.*Weoweittoyouthatwearestillalive.

*Itookitforgrantedthattheywerenotcoming.動詞+it+介詞短語+that從句，常見于oweittosb,takeitforgranted等結構中。動詞+介詞+it+that從句，常見于lookto,dependon,insiston,stickto,answerfor等結構中。e.g.*Sheinsistedonitthatshewasinnocent.*Youmaydependonitthathewillhelpyou.e.g.*Hemadeitknowntoeveryonethathewasright.

*Theyhaven’tmadeitknownwheretheyaretoholdtheconference.動詞+it+過去分詞+從句。根據(jù)括號內(nèi)的漢語提示并用it作形式賓語補全下面句子。1._______________________(我認為那很重要)tofindapart-timejob.2._______________________________(新技術使之成為可能)toachieveabalancebetweeneconomicdevelopmentandecosystems.IconsideritimportantNewtechnologiesmakeitpossible3._______________________(他們覺得很困難)torecovertheoriginalecosysteminsuchashorttimelastyear.4.______________________________________(你為何不讓人們引起注意)thatouractions,nomatterhowsmalltheymaybe,makeadifferencetonature?Theyfeltitverydifficult

Whydon'tyoubringittopeople'sattentionRewritetheunderlinedpartsusingitasanemptyobject.Thered-earedslider,aspeciesoffreshwaterturtle,isnativetotheSouthernUnitedStatesandNorthernMexico.Duetoitscuteappearance,manypeoplethinkkeepingthisturtleasapetisagoodidea.manypeoplethinkitagoodideatokeepthisturtleasapet.2Recentyearshaveseenmoreandmorepetslidersescapingorbeingreleasedfromhomes,andsomeownersbelievetoreleasethemintothewildisnobigissue.believeitnobigissuetoreleasethemintothewildThesedays,peoplehavefoundtoreleasetheseturtlesintothewildisathreattootherspecies.peoplehavefounditathreattootherspeciestoreleasetheseturtlesintothewildExpertsconsiderownerskeepingtheirpetsinanenclosedareaimportant,andanyoneunabletokeeptheirpetsshouldtakethemtoanappropriateanimalshelter.ExpertsconsideritimportantforownerstokeeptheirpetsinanenclosedareaLookatpicturesofSaihanbaNationalForestParkandfindoutthechanges./3LocatedinChengdeCity,HebeiProvince,Saihanba(塞罕壩)sits450kilometerstothenorthofBeijing.Theplaceiscoveredwithsnowsevenmonthsayear.Itusedtobeafreezing,barrendesertplaguedbysandstorms.However,ithasbeenturnedintotheworld’slargesthuman-madeforestthatcoversanareaofnearly75,000hectares.Thus,itiscalleda“greenmiracle.”LookatthepicturesoftheSaihanbaNationalForestParkanddescribeitschangesusingitasanemptyobjectwhereappropriate.Youmayrefertothewordsandexpressionsinthetableforhelp.nouns/adjectivestodo/thatbreakthroughimpossiblelikelyunrealistic...growinvestigateplanttreestransform...Ithinkitabreakthroughtotransformadesertintoaforest...Ithinkitimpossibletogrowtreesthereinthe1960s.IthinkitunrealistictoplanttreesinthedesertwhentheworkersfirstcametoSaihanba.根據(jù)漢語意思，補全下列句子（每空一詞）。1.我們認為提高公眾保護海洋野生動物的意識非常重要。Weconsider___________________________________thepublic'sawarenessofsavingoceanwildlife.2.你認為顧客們有可能不使用塑料瓶和塑料袋嗎？Doyouthink__________________forcustomersnot____________________plasticbottlesandbags?itvitaltoraise

itpossible

touse

3.