高中英语模块三it的用法课件人教版必修三.ppt(PPT文档)

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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:1.S+think+it+necessary+(forsb.)todosth.Thechairmanthought___necessarytoinviteProfessorSmithtospeakatthemeeting.(05全国)A.thatB.itC.thisD.himSentencepatterns:B…find…possiblefeel…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…)itwhen….2.Iwouldappreciateitif…3.…seeto(dependon…)itthat…Sentencepatterns: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(should+动词原形),should可以省去,建议记住该句型中的形容词。Itisimportantthatwe(should)learnEnglishwell.Itisnecessarythathe(should)rememberthesewords.5.Itissaid(reported,learned....)that...该句型中的it仍是形式主语,真正主语是that引导的主语从句;该结构常译为"据说(据报道,据悉...)"。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.这种事竟然发生在你们班上,真是遗憾!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...)timethat...该句型要和上一个句型区别开来,该句型中的that从句不用虚拟语气,而用完成时态,。至于用什么完成时态,由主句的谓语动词的时态决定。如果是一般现在时,后面从句用现在完成时态;如果是一般过去时,后面从句则用过去完成时态,该结构中that可以省去;it有时用this替换.常译为"是第一(二)...次..."。ItisthefirsttimeIhavebeenhere.=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.该句型中的不定式是真正的主语,it是形式主语,句型中的直接宾语是时间,常译为"做...要花费某人..."。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.itItis/was+被强调的部分+that/who+句子其他成分强调句型高考真题Itwas___backhomeaftertheexperiment.A.notuntilmidnightdidhegoB.untilmidnightthathedidn’tgoC.notuntilmidnightthathewentD.untilmidnightwhenhed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