it用法总结ppt课件

The use of“It”1it用法总结The use of“It”1it用法总结11.it1.it作人称代词1.1.it1.1.it的最基本用法是作人称代词，主要指刚提到的事物，以避免重复:Ningbo is a beautiful city,isnt it?1.2.1.2.也可以指动物或婴儿(未知性别的婴儿或孩子):):IsthisyourdogIsthisyourdog？No,itisnt.No,itisnt.1.3.1.3.也可指抽象事物:It was a great surprise to me when he did a thing like that2it用法总结 1.it作人称代词2it用法总结22.2.非人称代词it itit it有时并不指具体的东西，而泛指天气、时间、环境等，称为非人称的it it：2.1.2.1.指天气：Itisalovelyday,isntit?Itisalovelyday,isntit?Itisabitwindy.Itisabitwindy.2.2.2.2.指时间:Itwasnearlymidnightwhenshecameback.Itwasnearlymidnightwhenshecameback.2.3.2.3.指环境:Itwasveryquietinthecaf.Itwasveryquietinthecaf.2.4.2.4.指距离：Itishalfanhourswalktothecitycentre.Itishalfanhourswalktothecitycentre.3it用法总结2.非人称代词it2.4.指距离：3it用法总结3.引导词it it1.Itis+1.Itis+被强调部分+that.+that.使用该句型有以下几点请注意：强调句的谓语is is或waswas永远用单数.ItwasyesterdaythatImetyourfatherintheItwasyesterdaythatImetyourfatherinthestreetstreet不管被强调部分是哪种状语，只能用thatthat连接，不得使用wherewhere、whenwhen等连词.ItwasinthestreetthatImetyourfatherItwasinthestreetthatImetyourfatheryesterdayyesterday4it用法总结.引导词it1.It is+被强调部分+tha4被强调部分为人时，可用who(主格或宾格)和whom(宾格)代替that，用that也行。1)Itwasyourfatherthat/whom/whoImetinthestreetyesterday2)ItwasIthat/whometyourfatherinthestreetyesterday强调句中也要注意主谓一致、人称一致和否定转移的问题。ItistheywhoareourfriendsItwasnotuntiltenoclockthatwegothomelastnight5it用法总结5it用法总结5注意不要混淆强调句和其他从句。Itiswasthat为强调句标志，去掉后仍可组成一个完整的句子，只是没被强调,而其他从句一般不具备这一特征。比较：1)Itwastenoclockwhenwegothomelastnight我们昨晚到家时已十点了。2)Itwasattenoclockthatwegothomelastnight我们昨晚是在十点到家的。要点点拔第一句不是强调句，when不可改为that,因为去掉itwas和that后，只能组成“Wegothometenoclocklastnight”这样一个不完整的句子；第二句是强调句，that不可改为when6it用法总结注意不要混淆强调句和其他从句。It is wasthat62.Itisnotuntil+2.Itisnotuntil+被强调部分+that.+that.该句型也是强调句型。主要用于强凋时间状语，译成汉语直到才，可以说是not.until.not.until.的强调形式。ItwasnotuntilshetookoffherdarkglassesItwasnotuntilshetookoffherdarkglassesthatIrealizedshewasafamousfilmstar.thatIrealizedshewasafamousfilmstar.=NotuntilshetookoffherdarkglassesdidI=NotuntilshetookoffherdarkglassesdidIrealizeshewasafamousfilmstar.realizeshewasafamousfilmstar.=Ididntrealizeshewasafamousfilmstar=Ididntrealizeshewasafamousfilmstaruntilshetookoffherdarkglasses.untilshetookoffherdarkglasses.7it用法总结2.It is not until+被强调部分+t73.it3.it用作形式主语3.13.1代替主语从句1 1）Itis+adj.+thatItis+adj.+that从句Itisclear(obviousItisclear(obvious，truetrue，possiblecertain.)thatpossiblecertain.)that.“.“清楚（显然，真的，肯定）”Itisveryclearthathesroundandtalllikeatree.Itisveryclearthathesroundandtalllikeatree.Itisimportant(necessary.Itisimportant(necessary，rightright，strangestrange，natural.)that.natural.)that.thatthat后的从句中要用虚拟语气（should+should+动词原形），shouldshould可以省去，建议记住该句型中的形容词。Itisimportantthatwe(should)learnEnglishwell.Itisimportantthatwe(should)learnEnglishwell.8it用法总结3.it 用作形式主语8it用法总结8 2 2）.Itis+v-ed+that.Itis+v-ed+that从句Itissaid(reportedItissaid(reported，learned.)that.learned.)that.据说（据报道，据悉）“。ItissaidthathehascometoBeijing.ItissaidthathehascometoBeijing.Itissuggested(ordered.Itissuggested(ordered/demanded/insisted/commanded.)that./demanded/insisted/commanded.)that.主句中的过去分词是表示请求，建议，命令等词时，thatthat后的从句要用虚拟语气（should+should+动词原形），shouldshould可以省；常译为“据建议；有命令）Itissuggestedthatthemeeting(should)beputoff.Itissuggestedthatthemeeting(should)beputoff.9it用法总结 2）.It is+v-ed+that 从句9it用法93 3）.Itisapity(ashame.)that.Itisapity(ashame.)that.thatthat后的从句一般用虚拟语气（should+should+动词原形），shouldshould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.Itisapitythatsuchathing(should)happeninyourclass.Itisapitythatheisill.Itisapitythatheisill.10it用法总结3）.It is a pity(a shame.104).Itistime(abouttime4).Itistime(abouttime，hightime)that.hightime)that.该句型中thatthat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.Itistimethatchildrenwenttobed.Itisthefirst(second.)timethat.Itisthefirst(second.)timethat.“是第一（二）次”。ItisthefirsttimeIhavebeenhere.ItisthefirsttimeIhavebeenhere.=ThisisthefirsttimeIhavebeenhere.=ThisisthefirsttimeIhavebeenhere.11it用法总结4).It is time(about time，115).Ithappens(seems5).Ithappens(seems，lookslooks，appears)that.appears)that.该句型中it it是形式主语，thatthat引导的是主语从句，主句中的happenhappen，seemseem等词是不及物动词。Ithappened(sohappened)thathemethisteacherintheIthappened(sohappened)thathemethisteacherinthestreet.street.碰巧.Itseemsthathewillbebackinafewdays.Itseemsthathewillbebackinafewdays.看来12it用法总结5).It happens(seems，looks，123.2.3.2.作形式主语替代不定式1).Ittakessb.todosth.1).Ittakessb.todosth.做要花费某人IttookthousandsofpeoplemanyyearstobuildtheGreatWall.IttookthousandsofpeoplemanyyearstobuildtheGreatWall.2).Itiskind(ofsb.)todosth.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：badbad，bravebrave，carelesscareless，cleverclever，cruelcruel，foolishfoolish，stupidstupid，wisewisewrongwrong等。这个句型可以改写为：sb.iskindtodosth.sb.iskindtodosth.。Itiskindofyoutosayso.Itiskindofyoutosayso.=Youarekindtosayso.=Youarekindtosayso.3).Itisnecessary(forsb.)todosth.3).Itisnecessary(forsb.)todosth.常见的形容词有：importantimportant，necessarynecessary，naturaleasynaturaleasy，safesafe，commoncommon，normalnormal，hardhard，difficult,dangerousdifficult,dangerous，等。在中的形容词作表语可以用从句改写，如：Itisimportantforhertocometotheparty.Itisimportantforhertocometotheparty.=Itisimportantthatshe(should)cometotheparty.=Itisimportantthatshe(should)cometotheparty.13it用法总结3.2.作形式主语替代不定式 13it用法总结13Itisnogood(use)doingsth.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nogoodnogood，(notanygood)(notanygood)，nousenouse，(notanyuse)notanyuse)。ItisnogoodlearningEnglishwithoutspeakingItisnogoodlearningEnglishwithoutspeakingEnglish.English.ItsuselesstryingtoarguewithShylock.ItsuselesstryingtoarguewithShylock.3.3.作形式主语替代ing形式14it用法总结It is no good(use)doing sth144.It4.It作形式宾语.Wethinkitimportanttolearnaforeignlanguage.Wethinkitimportanttolearnaforeignlanguage.该句型中的it it作形式宾语，为了记忆方便我们可称该句型为61236123结构。6 6指主句中常用的动词：think,believe,make,find,consider,feelthink,believe,make,find,consider,feel；1 1指的是形式宾语it it；2 2指的是宾补的两种形式：形容词或名词；3 3指的是真正宾语的三种形式：不定式短语，动名词短语或thatthat引导的宾语从句。Wethinkitourdutytocleanourclassroomeveryday.Wethinkitourdutytocleanourclassroomeveryday.HefeltitimportantlearningEnglishwell.HefeltitimportantlearningEnglishwell.TheyfounditdifficultthattheywouldfinishtheirworkinTheyfounditdifficultthattheywouldfinishtheirworkintwodays.twodays.15it用法总结4.It 作形式宾语.15it用法总结15五、特殊句型1).Itis.since.1).Itis.since.。Itis(hasbeen)5yearssincehisfatherdied.Itis(hasbeen)5yearssincehisfatherdied.2).Itis.when.2).Itis.when.。“当的时候，是”Itwas5oclockwhenhecamehere.Itwas5oclockwhenhecamehere.3).Itbe.before.3).Itbe.before.该句型主句中的it 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longlong，notlongnotlong，3days3days，2weeks2weeks等表示时间段的词或短语，常译为“之后”。Itwas3daysbeforehewenttoBeijing.Itwas3daysbeforehewenttoBeijing.Itwillbenotlongbeforehefinisheshisjob.Itwillbenotlongbeforehefinisheshisjob.16it用法总结五、特殊句型3).It be.before.164 4）.Itlooks(seems)asif.Itlooks(seems)asif.该句型中it it无意义，asifasif引导一个状语从句。常译为，看起来好象如果与事实不相符合，则用虚拟语气。Itlooksasifheisill.Itlooksasifheisill.（真的病了）Itlooksasifhewereill.Itlooksasifhewereill.（没有生病）ItseemedasifheweredyingItseemedasifheweredying5 5）.Itdoesntmatterwhether(if).Itdoesntmatterwhether(if).该句型中whether(if)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。ItdoesntItdoesntmatteriftheyareold.matteriftheyareold.17it用法总结4）.It looks(seems)as if.17 6）make it 及时赶到;成功;办成 You can make it if you hurry.You neednt worry;he will make it.7）catch it 被责骂;受处罚IfIcomehomelateIllcatchitfrommymother.Youllcatchitbecauseofyourcarelessness.18it用法总结 7）catch it 被责骂;受处罚18it用法总结188）.It的一些习惯用法How is it with your study?学习好吗？Thats it.这就对了。It went hard with him.他身遇不幸。It is all over with me.我完蛋了。We must fight it out.我们必须坚持到底。I cant help it.我没有办法。19it用法总结8）.It的一些习惯用法19it用法总结1920it用法总结Good bye20it用法总结20