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It’s10:08It’slovelyItweighsonly3kilosIt’salargesumofmoney2.2.指时间:Itwasnearlymidnightwhenshecameback.2.3.指环境:Itwasveryquietinthecafé.2.4.指距离：Itishalfanhour’swalktothecitycentre.3.it的其他用法3.1.表示谁在做某事的句子：Whoisit?---It’sme.Herfacelightedwhenshesawwhoitwas.3.2.用来泛泛的指某件事：Soyouaregoingtobemarriedthistime？Whenisit？Itdoesn’tmatter./Itisashame,isn’tit?it可用来指代前文提到的人,物或事情,也可以用来指时间,金钱,距离,天气等自然现象基本用法:____wasasunnyday.Peterdecidedtogoforawalktothepark,though_____wastwomilesaway.___wassocomfortabletowalkonthestreet.itItItSuddenly___begantorain.Hefound__hardtowalkthere.Thenhetookabushome.Unfortunately___wentwrong.Whenhegothome,hewaswetthrough.Thus___wasadaythathewouldneverforget.ititititEg:Itwasasunnyday.Peterdecidedtogoforawalktothepark,thoughitwastwomilesaway.Summary2Itcanbeusedasimpersonalpronounstotalkabouttime,date,distanceorweatherandsoon.1.S+think+it+necessary+(forsb.)todosth.Thechairmanthought___necessarytoinviteProfessorSmithtospeakatthemeeting.(05全国)A.thatB.itC.thisD.himSentencepatterns:B…findpossiblefeel…important/clause形式宾语2.S+V+it+one’sduty+(forsb.)todosth./clause3.S+V+it+nogood+doingsth.nouse形式宾语Ithinkithisdutytocleantheblackboard.Sentencepatterns:…aruleanhonour……findpossible1.S+think+it+necessary+(forsb.)todosth./clausefeelimportant……Sentencepatterns:形式宾语…arule2.S+V+it+one’sduty+(forsb.)todosth./clauseanhonour…3.S+V+it+nogood+doingsth.nouseIlike___intheautumnwhentheweatherisclearandbright.(04全国)A.thisB.thatC.itD.one点拨:这是it作形式宾语的一种特殊用法.少数动词(如like,love,enjoy,dislike,hate,appreciate等)或包含介词的动词短语(如seeto,dependon等)后接宾语从句,必须先由it担任形式宾语,再接从句.1.Ilike(enjoy,hate…)itwhen2.Iwouldappreciateitif…3.…seeto(dependon…)itthatSentencepatterns:C形式宾语1.Itisnecessarytobepreparedforajobinterview.Havingtheanswersreadywillbeofgreathelp.2.TheForeignMinistersaid,“Itisourhopethatthetwosideswillworktowardspeace.”3.Itisknowntoeverybodythatthemoontravelsroundtheearthonceeverymonth.形式主语高考真题Itisclear(obvious，true，possible，certain....)that.....该句型中it是形式主语，真正的主语是that引导的主语从句，常译为“清楚（显然，真的，肯定．．．）”是主语从句最常见的一种结构。Itisveryclearthathe’sroundandtalllikeatree.=Thathe’sroundandtalllikeatreeisveryclear.4.Itisimportant(necessary，strange，natural...)that...该句型和上一个同属一个句型；由于主句中的形容词不同，that后的从句中要用虚拟语气.Itisimportantthatwe(should)learnEnglishwell.Itisnecessarythathe(should)rememberthesewords.5.Itissaid(reported，learned....)that...ItissaidthathehascometoBeijing.Itisreportedthatanotherearthsatellitehasbeenputintoorbit.6.Itissuggested(ordered/demanded/insisted/commanded...)that...该句型和上一个同属一个句型，主句中的过去分词是表示请求，建议，命令等词时，that后的从句要用虚拟语气（should+动词原形），should可以省；常译为“据建议；有命令．．．）Itissuggestedthatthemeeting(should)beputoff.Itwasorderedthatwe(should)arrivethereintwohours.7.Itisapity(ashame...)that...该句型中，that后的从句一般用虚拟语气（should+动词原形），should可省去．表示出乎意料，常译为＂竟然＂。没有这种意义时，则不用虚拟语气。Itisapitythatsuchathing(should)happeninyourclass.Itisapitythatheisill.他生病了，真遗憾！8.Itistime(abouttime，hightime)that...该句型中that后的从句应该用虚拟语气，值得注意的是①常用过去时态表示虚拟．②有时也用should+动词原形，should不能省，常译为＂是（正是）．．．的时侯．．．＂Itistimethatchildrenshouldgotobed.=Itistimethatchildrenwenttobed.9.Itisthefirst(second...)timethatsbhas/havedonesthItwasthefirsttimethatsbhaddonesthItisthefirsttimeIhavebeenhere.=ThisisthefirsttimeIhavebeenhere.10.Itis....since...。该句型主要用作处理瞬间动词的完成时，又要和表示一段时间的时间状语连用的问题，主句中是时间作表语，其时态是现在时或完成时，since引导的从句通常是一般过去时态，而且是瞬间动词。如果主句是一般过去时，从句则用过去完成时。Itis(hasbeen)5yearssincehisfatherdied.11.Itis...when...。该句型中的when引导的是一个时间状语从句，主句中的it指时间，表语由具体的时间充当，常译为＂当．．．的时候，是．．．＂Itwas5o’clockwhenhecamehere.12.Itbe...before...该句型主句中的it指时间，主句中的时态常是将来一般时或过去时两种时态．主句中的表语多是long，notlong，3days，2weeks等表示时间段的词或短语，常译为“．．．之后．．．”。Itwas3daysbeforehewenttoBeijing.Itwillbenotlongbeforehefinisheshisjob.13.Ithappens(seems，appears)that...该句型中it是形式主语，that引导的是主语从句，主句中的happen，seem等词是不及物动词。Ithappened(sohappened)thathemethisteacherinthestreet.碰巧．．.Itseemsthathewillbebackinafewdays.看来．．．14.Ittakessb....todosth.IttookthousandsofpeoplemanyyearstobuildtheGreatWall.15.Itisnogood(use)doingsth.该句型中的真正主语是动名词短语，主句中的表语可以是nogood，(notanygood)，nouse，(notanyuse)。ItisnogoodlearningEnglishwithoutspeakingEnglish.16.Itdoesn’tmatterwhether(if)...该句型中whether(if)引导的从句是真正主语，该句型常译为＂不论（是否）．．．没关系．．．。Itdoesn’tmatteriftheyareold.17.Itiskind(ofsb.)todosth.该句型中的不定式短语是真正主语，如果不定式的逻辑主语是由of引起，主句中的形容词必须是能表示逻辑主语特征的形容词。常见的有：bad，brave，careless，clever，cruel，foolish，good（好心的），honest，horrible，kind，lazy，modest，naughty，nice（有教养的），polite，rude，silly，stupid，wise，wrong（错误的）等。这个句型可以改写为：sb.iskindtodosth.。Itiskindofyoutosayso.=Youarekindtosayso.18.Itisnecessary(forsb.)todosth.该句型与上一个同属一个句型，如果不定式的逻辑主语是由for引起，主句中的形容词通常是表示重要性，紧迫性，频繁程度，难易，安全等情况的形容词。常见的形容词有：①important，necessary，natural②easy，safe，common，normal，hard，difficult，dangerous，unusual，rare，impossible，pleasant等。=在①中的形容词作表语可以用从句改写，如：Itisimportantforhertocometotheparty.=Itisimportantthatshe(should)cometotheparty.…possibleItis/was+adj.necessary+(forsb.)todosth./clauseimportant……one’sdutyIt+is/was+n.one’shope+clause/(forsb.)todosth.anhonour……saidItis/wasp.p.known+that-clausebelieved…形式主语Itistheabilitytodothejob__mattersnotwhereyoucomefromorwhatyouare.A.oneB.thatC.whatD.i