it做形式主语PPT课件

.,1,.it用作形式主语.1代替主语从句1）Itis+adj.+that从句Itisclear(obvious，true，possiblecertain.)that.“清楚（显然，真的，肯定）”Itisveryclearthathesroundandtalllikeatree.Itisimportant(necessary，right，strange，natural.)that.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.,.,2,2）.Itis+v-ed+that从句Itissaid(reported，learned.)that.据说（据报道，据悉）“。ItissaidthathehascometoBeijing.Itissuggested(ordered/demanded/insisted/commanded.)that.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.,=HeissaidtohavecometoBeijing.,.,3,3）.Itisapity(ashame.)that.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.,.,4,4).Itistime(abouttime，hightime)that.该句型中that后的从句应该用虚拟语气，值得注意的是常用过去时态表示虚拟常译为“是（正是）的时侯”Itistimethatchildrenwenttobed.Itisthefirst(second.)timethat.“是第一（二）次”。ItisthefirsttimeIhavebeenhere.=ThisisthefirsttimeIhavebeenhere.,.,5,5).Ithappens(seems，looks，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,.,6,6).Itdoesntmatterwhether(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。,Itdoesntmatteriftheyareold.,.,7,.2.作形式主语替代不定式1).Ittakessb.todosth.做要花费某人IttookthousandsofpeoplemanyyearstobuildtheGreatWall.2).Itiskind(ofsb.)todosth.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，stupid，wisewrong等。这个句型可以改写为：sb.iskindtodosth.。Itiskindofyoutosayso.=Youarekindtosayso.3).Itisnecessary(forsb.)todosth.常见的形容词有：important，necessary，naturaleasy，safe，common，normal，hard，difficult,dangerous，等。在中的形容词作表语可以用从句改写，如：Itisimportantforhertocometotheparty.=Itisimportantthatshe(should)cometotheparty.,.,8,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,nouse,uselessItisnogoodlearningEnglishwithoutwritingEnglish.ItsuselesstryingtoarguewithShylock.,.3.作形式主语替代ing形式,.,9,.Itlooks(seems)asif.,常译为，“看起来好象”如果与事实不相符合，则用虚拟语气,Itlooksasifheisill.（真的病了）,Itlooksasifhewereill.（没有生病）,Itseemedasifheweredying.,.,10,.Itisuptosb.todosth.,Itisuptohimtocleanourclassroomtoday.今天应由他做教室清洁。Itisuptoparentstoteachtheirchildrenmanners.该由父母教孩子礼貌。,.,11,Itisyourturntocleanourclassroomtoday.,.Itisonesturntodosth.,今天该轮到你做教室清洁。,.,12,Itisnowonderthathedidntwanttogo.Nowonderhedidntwanttogo.,.Itisnowonderthat,在该句型中如果用肯定形式，表示“真奇怪，真是令人惊讶”；,Itisawonderthathereusedsuchagoodoffer.,真奇怪，他拒绝了这样好的帮助。,难怪他不愿去。,.,13,4.It作形式宾语.Wethinkitimportanttolearnaforeignlanguage.该句型中的it作形式宾语，为了记忆方便我们可称该句型为6123结构。6指主句中常用的动词：think,believe,make,find,consider,feel；1指的是形式宾语it；2指的是宾补的两种形式：形容词或名词；3指的是真正宾语的三种形式：不定式短语，动名词短语或that引导的宾语从句。Wethinkitourdutytocleanourclassroomeveryday.HefeltitimportantlearningEnglishwell.Theyfounditdifficultthattheywouldfinishtheirworkintwodays.,.,14,findpossibleS+think+it+necessary+(forsb.)todosth./thatfeelimportant,Sentencepatterns:,形式宾语,arule2.S+V+it+onesduty+(forsb.)todosth./thatanhonour,3.S+V+it+nogood+doingsth.nouse,.,15,Wethinkitourdutytocleanourclassroomeveryday.Hefeltitnogoodplayingcomputergames.Theyfounditdifficultthattheywouldfinishtheirworkintwodays.,.,16,该句型中的it是一个形式宾语，表示模糊意思或代替后面that引导的宾语从句。因为在这个句型中的谓语动词都是需要跟宾语的，但又不能直接跟从句作宾语，于是就得在从句前加上一个形式宾语it。,.Wearecountingonitthatyouwillcome.,常见的短语和动词有：counton(依靠，指望，期盼),seeto(负责),dependon(依靠),relyon(信赖，依靠)等。,.,17,Ilike_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.,Ilike(enjoy,hate)itwhenIwouldappreciateitifseeto(dependon)itthat,Sentencepatterns:,C,形式宾语,.,18,）makeit及时赶到;成功;办成Youcanmakeitifyouhurry.Youneedntworry;hewillmakeit.,）putit说,评价“Heisanhonestman.”Tomputit.,.,19,Specialnotice:,itbevstherebe,“是”,“有”,.,20,_someoneatthedoor.Ithink_themantodeliverthemilk.Letshurry!_alongwaytogo._noneedtohurry.Westillgetmuchtime._awonderthatherefusessuchagoodoffer.,Thereis,itis,Thereis,Thereis,Itis,Itis?Thereis?,.,21,5._nodoubtthathehasdonesomethingbad.6._nopossibilitythathewillcheatus.7._nogoodarguingwiththeunreasonablewoman.8._nodifferencebetweenthetwoplans.,Thereis,Thereis,Itis,Thereis,.,22,9._wasatimewhen10._isnodenyingt