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1、Theuseof“it”(I)1.It’sasmallworldafterall.3.It’safineday,isn’tit?2.Abirdlandedonthetree.It’ssinging.4.Whattimeisit?It’sseveno’clock.5.Thebabyiscrying.Itmightbehungry.this/thatI.人稱代詞a.用作人稱代詞，代替前文提到過的事物，以避免重復(fù):b.也可以指動(dòng)物或嬰兒(未知性別的嬰兒或孩子):2.非人稱代詞有時(shí)并不指具體的東西，可指天氣、時(shí)間、距離
2、、環(huán)境等Itwasveryquietinthecafé.Itishalfanhour’swalktothecity.3.指示代詞指代this或thatThisisyourpen,isn’tit?What’sthatonthedesk?Iguessitmightbearobot.Itisobviousthatgoingforsportswilldoalotofgoodtoyourhealth.It’sapitythattheChineseteamdoesn’tattendtheWorldCupinSouthAfr
3、icathisyear.4.it作形式主語(PreparatorySubject)代替不定式，動(dòng)名詞或從句所表示的真正主語。Peoplebelievedthatthemandid’ttellalie.It’sbelievedthatthemandid’ttellalie.Thetwosidesaresaidtohavereachedanagreement.It’ssaidthatthetwosideshavereachedanagreement.TheswordhasbeenprovedtodatefromQi
4、nDynasty.IthasbeenprovedthatthesworddatedfromQinDynasty.HowearlymanwasabletoconstructStonehengeisamystery.It’samysteryhowearlymanwasabletoconstructStonehenge.it作形式主語的句型常見的有：Itisclear(obvious，true，possible，certain....)thatItissaid(reported，believed....)that..
5、.Itissuggested(ordered/demanded/insisted/commanded...)that...從句用虛擬語氣Itisapity(shame/duty/fact/honor/nosurprise...)that...Ithappens(seems，looks，appears)that....Itdoesn’tmatter(nowonder…)+wh-/how-clauseIttakessb....todosth…Itisnogood(use)doingsth…Itlooks(seems
6、)asif...歸納5.作形式賓語(PreparatorySubject)為了記憶方便我們把該句型總結(jié)為"6123結(jié)構(gòu)"。6指主句中常用的動(dòng)詞：think,believe,make,find,consider,feel；1指的是形式賓語it；2指的是賓補(bǔ)的兩種形式：形容詞或名詞；3指的是真正賓語的三種形式：不定式短語，動(dòng)名詞短語或從句。Wethinkitourdutytocleanourclassroomeveryday.HefeltitimportantlearningEnglishwell.Theyfoun
7、ditdifficultthattheywouldfinishtheirworkintwodays.ItwaswithastrongbeliefthatMartinLutherkingledmangmovementsagainstracialdiscrimination.6.用于強(qiáng)調(diào)結(jié)構(gòu)（emphaticstructure）Itis/was+被強(qiáng)調(diào)部分+that/who...+其他成分ImetTominthestreetyesterday.強(qiáng)調(diào)結(jié)構(gòu)的一般疑問句型：Is/was+it+所強(qiáng)調(diào)的部分+that/wh
8、o…?WasityouthatmetTominthestressyesterday?強(qiáng)調(diào)結(jié)構(gòu)的特殊疑問句型：疑問詞+is/was+it+that/who…?Whowasitthatyoumetinthestreetyesterday?WherewasitthatyoumetTomyesterday?...not…until….句式用于強(qiáng)調(diào)句型要注意否定詞not前移構(gòu)成：Itis/was
