高二第二学期it的用法

一)高考试题题选与分析1，[1990]Idon’tthink___possibletomasteraforeignlanguagewithoutmuchwork.A.ThisB.That.C.Its.D.It2，[1991]Does___matterifhecan’tfinishthejobontime?A.ThisB.ThatC.HeD.It3，[1992]Itwasnot___shetookoffherdarkglasses___Irealisedshewasafamousfilmstar.A.When,thatB.Until,thatC.Until.whenD.When,then4,[1992]Itworriedherabit___herhairwasturninggrey.A.whatB.thatC.ifD.for5,[1993]---Whatwasthepartylike?---Wonderful.It’syears___Ienjoyedmyselfsomuch.A.AfterB.BeforeC.whenD.Since6,[1993]Tom’smotherkepttellinghimthatheshouldworkharder,but___didn’thelp.A.HeB.WhichC.SheD.It7,[1994]___isafactthatEnglishisbeingacceptedasaninternationallanguage.A.ThereB.ThisC.ThatD.It8,[1997]Itwasabout600yearsago___thefirstclockwithafaceandanhourhandwasmade.A.ThatB.UntilC.BeforeD.When9,[1998]ItwasonlywhenIrereadhispoemsrecently___Ibegantoappreciatetheirbeauty.A.UntilB.ThatC.ThenD.Soit的用法1代替前文提到过的人或事，或是上下文了解到的，可以是一个词，也可以是整个句子.e.g.Don’tthinkanymoreaboutit.Heboughtadictionaryandgaveittome.2It所指的东西不一定很具体，有时指做某个动作的人，有时指引起某种情况的事物。e.g.---Whoismakingsuchanoise?---Itmustbethechildren.It’sthewindshakingthewindow.3It可以代替指示代词this,that.e.g.---Whosedictionaryisthat?---Itismine.4it可指自然现象（如天气，气候，明暗等。）e.g.Itisfine/extremelyhot/pouring.Itissnowinghard/gettingcold/dark/late/clearingup.5it可指季节，时间。e.g.Itislateautumn/earlyspring/mid-summer.It’sOctober/awinterevening/midnight/teninthemoming.6it可指距离。e.g.Itisalongdistancefromthezoototherailwaystation.Itisonlyfivemiles/halfanhours’walk/tenminutes’ridetothesummerPalace.7it可指环境情况等。e.g.Itisveryquietatthemoment.8it作形式主语。当不定式，动名词，从句作主语时，常用it作形式主语，把真正的主语放句未。比较常见的句型有：Itisclearthat从句、、、、Itisnecessary/important/possible/easy…..forsbtodo….Itiskind/foolish/polite/brave/careless…ofsbtodo….Itseems/appears/happensthat从句。Ittakestimetodosth.Itisuse/nogood/uselessdoingsthItissaid/reported/announcedthat从句。Itisapity/ashame/nowonderItiscertainthat从句。Itistimethat从句（谓语用过去时）9it作形式宾语。当不定式，动名词和从句作宾语时，可用it作形式宾语，把真正的宾语和句未，用it作形式宾语的句型有：主语+：believe/make/considerregard/suppose+it+宾补+todosthfeel/think/find/imaginee.g.Airplaneshavemadeiteasyandcomfortableforustotrave10it用于强调句句型中：Itis/was+被强调部分（句子的主语，宾语或表语等）+（who）that+剩余部分。在强调until引导的表语时，如果在句中有not，not要提前与until连用。e.g.Theteacherdidn’tbeginhisclassuntileverybodytooktheirplaces.Itwasnotuntileverybodytooktheirplacesthattheteacherbeganhisclass.（区别：itis…that/when/before/since从句）A：Itis…that从句。1引导主语从句Itisclearthathecandoitwell.2.Itisthefirst/second…time(that)+主语+完成时“这是第二次做…B．Itis…when从句e.g.Ithinkitwillbemidnightwhentheworkisfinished.e.g.Itwasseptember10,1999whenIwenttoBeijing.C.Itis…从句。常用Itis/was/willbelong/notlong/manyyears/hours/afewminutesbefore…表示…去….就/才“或”不多久就…e.g.ItwasnotlongbeforethewholecountryroseupanddrovetheAustriansoldiersfromtheirhomeland.D.Itis…since从句意思是；“自从…以来已经多久了”。如果since从句中的谓语动词是短暂性动词，那么就表示该动作的开始，如果从句中的谓语动词是延续性动词或表示状态的动词，则指动作或状态的结束。就学生而言：Itisnearly12yearssinceIbecameastudent.就老师而言：Itisnearly12yearssinceIwasastudent.二．练习：1．Oxford,asweknow___,isonethebestunirersityintheworld.A.thatB.itc.thisD./2.ItwasthethirdtimeI__tothatcity.A.havebeenB.hadbeenC.cameD.Was.3.Whenwasit__youarrivedinNewYork?A.thatB.atwhichC.beforeD.Since.4.Itwas___ImetMr.GreeninShanghai.A.tenyearssinceB.fiveyearsC.twomonthswhenD.manyyearsagothat5.Jackisill,haveyouheardabout__?A.thatB.thisC.itD.which6.__whosuggestedthathe__toNewYorkinordertogetadirectfight.A.Itwasher…wentB.Itwasher…goC.Itwasshe…wentD.Itwasshe…go7__hasalreadybeenpointedout,grammarisnotasetofdeadrules.A.As.B.ItC.ThatD.This8__herealizeditwastoolatetoreturnhome.A.NosooneritgrewdarkthanB.HardlydiditgrowdarkwhenC.ItwasnotuntildarkthatD.Itwasuntildarkthat9.Iwasdisappointedwiththefilm,Ihadexpected__tobemuchbetter.A.thatB.thisC.itD.Them.10.---Sonoisyoutside!---__BillandJackquarrelling!A.ItisB.ThereareC.ThenareD.Maybe11.It__MikeandMarywhohelpedtheoldmanseveraldaysago.A.wereB.wasC.areD.hadbeen12.---Wasthatthenewschoolmasterwhowalkedby?---_____________.A.ItmustbethatB.ItmusthavebeenC.HemustbeD.Thismusthavebeen.13.Hefelt___toworkforhumanrightsandprogress.A.ithisdutyB.hisdutyC.thatisadutyD.thatishisduty答案：1．B．2。B3。A4。D5。A6。D7。A8。C9。C10．A11。C12。B13。B14。A15。D代词IT的用法１、代替则提到的一件事物。２、起提示代词的作用，指一个人或事物；指做某个动作的人。３、表示时间、天气、距离等。４、代替一个由否定式、动名词短语或主语从句。５、自然现象（如天气、气候、明暗等）、季节时间、环境等。６、强调句型：Itis/was+被强调部分＋that...eg:ItwasXiaoYangthatdidit.７、Ittakessb.sometimetodosth.eg:Ittookthesixthblindmanquitealongtimetofindtheelephant.８、Itisone'sdutytodosth.eg:Itisourdutytoattendthismatter.９、Itisnouse/gooddoingsth.eg:It'snousetalkingtoaboutit.１０、Itis＋for/ofsb.todosth.(necessary,important,strange,natural,后用for，在foolish,kind,nice,clever,silly,stupid,good,right,wrongrude等后用of。eg:Itisnecessaryforustomasteraforeignlanguage.ItisverykindofyouhelpmewithmyEnglish.１１、Ithappens/seems等动词＋that从句：eg:IthappenedthatIwasn'ttherethatday.Itseemedthathehadreadthereport.１２、Itdoesn'tmattertosb.whether...句型：eg:Itdoesn'tmattertomewhetherhecomesornot.１３、Itissaid/supposed/known/reported/announced/decided等动词＋that从句：eg:Itissaidthatthenovelhasbeentranslatedintoseveralforeignlanguage