搜索
it可以作代词（如人称代词、非人称代词）和引导词，也可以用于强调句式中，还可以用于一些固定表达中。一、it作代词1.用作人称代词，指代：①上文提到过的人、事、物或情况等；②婴儿、性别不明或没必要区分性别的人或动物。此外，it也可指代未知的人。如：Inmyopinion,lifeinthetwenty-firstcenturyismucheasierthanitwasusedto.Someoneisringingthedoorbell.Goandseewhoitis.It’sJohnonthephone.2.用作非人称代词，指时间、天气、距离或自然现象等。如：Itisonlyhalfanhour’swalktothehospital.It’sabouttwokilometersfromheretothestation.Itisrainingheavilyoutside.二、it作引导词1.it作形式主语的常用句型★“It+be+名词+主语从句”中从句谓语常用“（should+）动词原形”。常用于本句型的主要有apity,ashame,nowonder,noaccident等。如：Itisagreatpitythatheshouldbesogreedy.Itisashamethatheshouldattempttoinjurethereputationofanhonestman.Itwasnoaccidentthatsuchabookshouldappearinthe18thcentury.★“It+be+形容词+主语从句”中从句谓语常用“（should+）动词原形（或完成时）”。常用于本句型的形容词主要有impossible,strange,surprising等。如：Itisimpossiblethatitshouldbeamerecoincidence.It’sstrangethatsheshouldhavebeenarrestedforstealing.Itwassurprisingthatheshouldhavefinishedwritinganovelinonlytwentydays.★“It+动词（+宾语或状语）+主语从句”。常用于本句型的动词主要有please,happen等。如：Itpleasedmeverymuchthathesucceeded.Itpleasesmethatheshouldwanttotalkwithme.ItsohappenedthathehadjustleftforTianjin.★“It+动词的被动语态+主语从句”。常用于本句型的动词主要有accept,admit,allow,announce等。如：It’sacceptedthattheuniverseisendless.Itisgenerallyadmittedthatheisatrustworthyperson.Itwasannouncedthatallprisonerswouldbesetfree.ItwasannouncedthatthePrimeMinisterwouldspeakontelevisionthatevening.2.it作形式宾语★根据句子结构的需要，人们常用it作形式宾语，而将真正的宾语放在宾语补足语后。常用于这种句型的动词有believe,bring,consider,declare,feel,find,make,prove,think等。如：Ifinditamazingthatanyonewouldwanttolistentothatmusic.Idon’tthinkitpossibletomasteraforeignlanguagewithin3months.Ifounditworthwhilereadingthisbook.★it作形式宾语的常用句型：1）动词+it+if/when从句当enjoy,like,dislike,love,hate,prefer,appreciate等动词后需要接一个if或when引导的从句时，需要在动词后接it作形式宾语。如：Shewon’tlikeitifyouarrivelate.Hehatesitwhenpeopleusehisbike.I’dpreferitifIdidn’thavetodosomuchwork.Iwouldappreciateitverymuchifyouwouldhelpmewithit.2）动词+介词+it+that从句能用于此句型的主要有：dependon,answerfor,seeto。如：Youmaydependonitthathewillturnupintime.Ican’tanswerforitthattheboyishonest.I’llseetoitthatalltheseletterswillbesenttothepostbeforetwelve.三、it用于强调句型中强调句型可以对句中除谓语动词以外的成分加以强调。四、it用在一些固定表达中Assomeoneputsit,...像某人所说的那样Pleaseseetoitthat...请务必……Whenitcomesto...当提到……时Itlooks/seemsasif...看起来好像……It’stimeforsth.该做某事了It’stime(forsb.)todosth.（某人）该干某事了Itis(high)timethat...（早就）该……It’sfirst/second/third/...time+that...这是某人第几次干某事（从句谓语用现在完成时）Itis/hasbeen+一段时间+since...自从……已经……；Itwasn’t/won’tbelongbefore...没过多久就/很快……It’s+时间段+before...过……时间才……五、it与one的区别两者均可代替前面提到的事物，区别是：it指的是与前面已提到的事物为同一物，此时的it等于“the+名词”；而one指的是与前面已提到的事物为同一类物，此时的one等于“a+名词”。如：IhaveadictionarybutI’velentittoMary.Ihaven’tadictionary;canyoulendmeone?I.选用括号内合适的单词填空。1.Itwasonlyaftershehadbeguntocarryoutthetask________(that,when)Maryrealizeditwasextremelydifficulttocomplete.2.___(It,As)isourbeliefthatwecanmakeagoodlifeifweworkhard.3.___(It,What)issuggestedthatparentsshouldpaymoreattentiontotheirchildren’sinnerworld.thatItIt4.Asamatteroffact,_____(that,it)isnotfailureitself,butwhatwethinkoffailureandwhatwedoafterwardsthatcounts.5.—DoyoustilldriveyourFordcar?—No,Isold____(it,that)twoyearsago.6.Youmustkeep____(it,what)inmindthatyoucanneverbetoocarefulwhenproofreadingthenewspaper.7.Will____(that,it)beconvenientforyoutostartworktomorrow?itititit8.______(There,It)isnodoubtthatthevisitingteam,whichhasbetterplayers,willwinthematch.9.—Idon’tthinkIcanworkoutthemathsproblem.It’stoodifficult.—Thinkitover,andperhapsyouwillmake________(it,that).ThereitII.用there或it的正确形式填空。1.DuringmystaythereImade____arulenottoeatfattyfoods.2.I’dappreciate____ifyoucouldhelpmefindoutthereasonwhythecomputerdoesn’twork.3.IkepttellingMarynottostayuptoolateanymore,but____didn’thelp.4._____isanurgentneedforqualifiedteachers.5.Ilike____whenIamwithpeoplelikeMr.Ma,whoisalwayswillingtohelpothers.itititThereit6.—Whoismakingloudnoisesoutsidethewindow?—______isTom,myneighbour’sson.7.________wasnopointinstayinganylonger.8.I’masgoodacookassheisexceptwhen_____comestomakingpizza.9.Ihavenoideawho____wasthattaughtmethetrick,whichhelpedmetosolvetheproblem.10.________isahardjobforsuchalittleboytocarrytheheavyboxupstairs.Let’sgivehimahand.ItThereititItIII.选用正确的词完成下面短文。it,these,that,what,theDoyouhaveadraweroraboxofyourspecialstuff?1._____maylooklikejunktoanybodyelse,buttoyou2.____maybeveryimportant.Maybe3.________isyoursetoflastyear’shockeycards,abottletopyouhopedwouldshowthewinningnumber,thesmoothestpebblesyoucouldfindonthebeach,andyourclassphoto.Ifyouhavekeptthingslike4.________,thenyouareacollector!Somepeoplemightcall5.________collectionjunk,ititItthesethebutyoucancall6._____MEMORABILIA(MEM-or-a-BILLY-a)(值得纪念的事物).Thatsoundsmoreimpressive,doesn’t7.________?Ifyouthinkabout8.________happenswhenyoulookthroughyourcollection,youmightguesswhatmemorabiliaare.Sometimesjustlookingatoneofyourspecialthingshelpstotrigger(触发)amemoryofhowyougot9.________.Inmostkindsofcollections10.________iseasytoseehowtheitemsbelongtogether.ititwhatititIfyoucollectstamps,anybodycanseehowtheymakeacollection.11.________isnotsoeasyforsomebodyelsetounderstandhowyour