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It的用法归纳一:it做代词1.it指天气,时间,地点,距离等.Itiscoldtoday.Nanchongisabeautifulcity,isn’tit?Itisseveno’clocknow.2.It用来指代刚提到的事物,以避免重复.Itisacatoutsidethedoor.3.it指未知性别的某人.Someoneisknockingatthedoor.Whocanitbe?4.代词it,one和that.It代替的是前面提到的同一名称的同一事物,即同名同物。所代替的名词可以是可数名词也可以是不可数名词。One代替的是前面提到的同名异物中的任何一个,所代替的上午可数名词,其前可带冠词与修饰语,如代替复数名词,则用ones.That代替前面提到的同名异物中特指的事物,所代替的名词可以是可数名词也可是不可数名词,但其前通常不能有修饰语。Thepopulationproblemmaybethegreatestoneintheworld.Thedoctorinourschoolisyoungerthanthatinyourschool.IboughtadictionarythreeyearsagoandIamstillusingitnow.IboughtadictionarythreeyearsagobutIamgoingtobuyanewonesoon.二:it做形式主语1.Itisclear(obvious,true,possible,certain....)+that从句该句型中it是形式主语,真正的主语是that引导的主语从句,常译为"很清楚(显然,真的,肯定...)"是主语从句最常见的一种结构。It’sclearthatsmokingisbadforourhealth.2.Itisimportant(necessary,strange,natural...)+that从句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.Itisimportantthatwe(should)learnEnglishwell.Itisnecessarythathe(should)rememberthesewords.3.Itis/was+P.P.+that从句.1)Itissaid(reported,learned/believed/thought/considered/well-known....)that从句该结构常译为"据说(据报道,据悉...)"。ItissaidthathehascometoBeijing.Itisreportedthatanotherearthsatellitehasbeenputintoorbit.2)Itissuggested(ordered/demanded/insisted/commanded...)+that从句。该句型和上一句属一个句型。主句中的过去分词是表示请求、建议、命令(一坚持,二命令,三建议,四要求)等词时,that后的从句要用虚拟语气(should+动词原形)。should可以省略,常译为“据建议;有命令……”Itissuggestedthatthemeeting(should)beputoff.Itwasorderedthatwe(should)arrivethereintwohours.4.Itisapity(ashame...)that从句...在该句型中,that后的从句一般用虚拟语气(should+动词原形),should可以省去,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!5.Itistime(abouttime/hightime)that...sb.didsth/sb.shoulddosth.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)...的时侯了..."Itistimethatchildrenshouldgotobed.=Itistimethatchildrenwenttobed.6.Itisthefirst(second...)timethatsb.hasdonesth.Itwasthefirst(second...)timethatsb.haddonesth该句型应和上一个句型区别开来。该句型中不用虚拟语气,而用完成时态。如果主句是一般现在时,从句用现在完成时态;如果主句是一般过去时,从句则用过去完成时态。该结构中that可以省去;it有时也用this替换,常译为“是某人第一(二,…)次做某事”。ItisthefirsttimethatIhaveenjoyedthiskindofmooncake.ThiswasthesecondtimethatIhadbeentoBeijing.7.Itis+(一段时间)+since从句该句型主要用作处理瞬间动词的完成时,要和表示一段时间的时间状语连用。主句中是时间作表语,其时态是现在时和完成时,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.Itisalmostfiveyears___wesaweachotherlasttime.A.beforeB.sinceC.afterD.when(B)8.It+be+notlong/long/一段时间+before从句该句型主句中的it指时间,主句中的时态常是一般将来时或过去时两种时态,主句中的表语多是long,notlong,3days,2weeks等表示时间段的词和短语。常译为“……之后才……”,“没过……就……”Itwas3daysbeforehewenttoBeijing.Itwillnotbelongbeforehefinisheshisjob.9.It+be+时间点+when从句这个句型中,it指时间,而且表示时间的词语前没有介词(时间一般为具体时间)。主句中的谓语动词和从句中的谓语动词在时态上一般是一致的,主句是willbe,when从句用一般现在时代替将来时。常译为“当……的时候,是……”Itwasalready8o‘clockwhenwegothome.Itwasthenextmorningwhenwefinishedourwork.Itwillbemidnightwhentheygetthere.10.Itseems(似乎),appears(似乎),happens(碰巧)that从句该句型中的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。Ithappenedthathemethisteacherinthestreet.(碰巧……)Itseemsthathewillbebackinafewdays.(看来……)TheForeignMinistersaid,“___ourhopethatthetwosideswillworktowardspeace.”A.ThisisB.ThereisC.ThatisD.Itis(D)11.Ittakessb.sometimetodosth.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……事情要花费某人……时间”IttookthousandsofpeoplemanyyearstobuildtheGreatWall.12.Itisnogood(use)doingsth做某事是没有用的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.13.Itis/was+adj.+for/of+sb.todosth.该句型中的不定式短语是真正主语,如果主句中的形容词是能修饰逻辑主语的形容词。常见的有:bad,brave,careless,clever,cruel,foolish,honest,kind,lazy,modest,naughty,polite,rude,silly,stupid,wise,wrong等,不定式的逻辑主语由of短语引出。Itiskindofyoutosayso=Youarekindtosayso.如果不定式的逻辑主语是由for引出的,主句的形容词通常是表示重要性,紧迫性等情况的词。常见的有necessary,natural,easy,safe,common,,normal,hard,difficult,dangerous,unusual,grape,impossible等。Itisimportantforhertocometotheparty.=Itisimportantthatshe(should)cometotheparty.14.Itlooks(seems)asif…该句型中it无意义。Asif引导一个状语从句,常译为:“看起来好像……”如果与事实不相符合,则用虚拟语气。Itlooksasifheisill.(真的病了)Itlooksasifhewasill.(事实上没有生病)Itseemedasifhewasdying.三:It做形式宾语it用来替代作宾语的从句、动词不定式、动名词,而把真正作宾语的从句、动词不定式、动名词置于句尾。1.Sb.find/feel/consider/regard/think/believe/make+it+adj./n.todosth/Ifindithardtogiveupsmoking.Wethinkitourdutytocleanourclassroomeveryday.四:it用于强调句句型:Itis/was+被强调部分+that/who+其他部分……it可以用来对句子的某一成分加以强调。NancysawyoursisterinTokyolastweek.ItwasNancywhosawyoursisterinTokyolastweek.ItwasyoursisterwhoNancysawinTokyolastweek.ItwasinTokyothatNancysawyoursisterlastweek.ItwaslastweekthatNancysawyoursisterinTokyo.Notuntil的强调句型:itis/wasnotuntil……that…..在强调not…until结构时必须把not与until一起放到被强调的位置上。Ididn’trecognizeheruntilshetookoffherdarkglasses.五:It常用的固定搭配1.makeit在口语当中相当于succeed,表示:成功、做到、说定、赶上、及时到达。Shefeelsshe’sfinallymadeitasasinger.—I’mafraidIcan’twalkanyfurther.—Comeon!Youcanmakeit.Ifwesetoffnow,weshouldmakeittothestationbeforethetraingoes.2.makeit+时间点表示就定在什么时候了—whenshallwemeettomorrowmorning.—let’smakeit8:00attheschoolgate.3.Itisawasteoftime/moneydoingsth.It’sawasteoftimeyourtalkingtohim.你和他谈是浪费时间。4.(Itis)nowonder(that)…难怪……It’snowon
本文标题:It的用法归纳
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