高二英语it的用法-旧人教版

It最基本的用法是人称代词，主要代表刚提到的东西以避免重复。Lookatthatcar.It’sgoingmuchtoofast.Whereisthecarkey?----Iputitinyourdrawer.也可以代表抽象的东西。It’sallmyfault.也可以指动物或未知性别的婴儿。Whatabeautifulbaby，isitaboy?Howaboutthebaby?----I’lltakecareofit.还可代表一个彼此都知其何所指的东西。Wheredoesithurt?Ifhedoesn’tcome,Ican’thelpit.Youhavesavedmylife.Ishallneverforgetit.It可以表示“是谁（在某处或做某事）“Who’sthat?”“It’sme.”It’syourmotheronthephone.“Why,it’syou!”shecried.It还可以用来泛指某件事Isn’titawful!Itdoesn’tmatter.it有时并不指具体东西，而指天气、时间、环境、距离等，称为非人称代词it.It’sraining.It’sTuesdaytoday.It’squiethere.It’stwomilestothebeach.非人称代词it：It用于代替指示代词：替代词one,ones,that,those,it,this,that1)one,ones,that,thoseThat替换单数可数名词或不可数名词；one只替换单数的可数名词。Thevaseontheleftismorebeautifulthantheoneontheright.ThecoffeeproducedinBrazilismorefamousthanthatinMexico.That只用于替换表示事物的名词，而one/ones替换表示人和表示事物的名词皆可。Hisyoungersisteristallerthantheelderone.Ineedtheplasticbags,notthepaperones.ThecomputersinourschoolareconnectedtotheInternetwhilethoseintheirschoolaren’t.Thefootballplayersonourteamseemtobemoreenergeticthanthoseonyourteam.That/those一般用于替换有定冠词的名词；one/ones用于替换有不定冠词的名词。Thestyleofthebuildingissimilartothatofatemple.ACDplayermadeinJapancostsmorethanonemadeinHongKong.That/those一般不带前置定语，但必须有后置定语。One/ones都可。当替换词的后置定语用所有格的of短语或当替换词被所有格修饰时，不用one/ones而用thatof/thoseof.Ilikethevasebetterthantheone/thatinanothershop.Thewindowsofyourflatarecleanerthanthoseofmine.Agrandparent’sjobiseasierthanthatofaparent.2)it,this和that都可以替代前文已提到的事或情况，细微差别在于it不如其余两者那么强调。Soshedecidedtopaintthedoorpink.Itupsettheneighboursabit.Soshedecidedtopaintthehousepink.Thatreallyupsettheneighbours,asyoucanimagine.当前面提到的事物不止一件时，it通常指最先提到的事物，而This/that是指最后提到的事物。Wekeeptheicecreammachineinthespareroom.Itismainlyusedbythechildren.(指themachine)Wekeeptheicecreammachineinthespareroom.This/Thatismainlyusedbythechildren.(指thespareroom)This可以出现在它所指代的事物之前；而that则指上文所提到的事物。Listentothis!Wewillhavethreedaysoff.“Apennysavedisapennyearned.”Whosaidthat?3)It和oneIt用以指特定的前面提到过的事物，即：it和它替换的是同一个事物，it前无修饰语；而one用于替换与前提事物有共同之处但并不完全一样的事物，因此，one之前或之后一定有修饰语来加以区别。IboughtadictionarythreeyearsagoandIamstillusingitnow.IboughtadictionarythreeyearsagobutIamgoingtobuyanewonesoon.形式主语it：有下面几种类型：be+形容词+不定式eg:It’sbettertobeearly.be+名词+不定式eg:Itwashisdutytotakecareoftheorphans.be+介词短语+不定式eg:It’sbeyondmetosaywhy.It+及物动词+宾语+不定式eg:Itmakesmesicktothinkaboutit.be+名词+动名词eg:It’snogoodstandinghereinthecold.be+形容词+动名词eg:It’shelplesstryingtoconvinceher.其他结构+动名词eg:Itdoesn’tmatterwaitingafewmoredays.用于由that引导的主语从句，有下面几种类型：it+be+形容词+that从句：eg:Itisnaturalthattheyshouldhavedifferentviews.it+be+名词+that从句:eg:It’sashamethatyou’resick.it+动词（+宾语）+that从句eg:Ithappenedthatshewasn’tinthatday.Eg2:Itneveroccurredtomethatperhapsshewaslying.It+动词的被动语态(said/believed/thought/expected/reported/known+that从句eg:It’ssaidthattherehasbeenanearthquakeinIndia.形式宾语it:it可以代表不定式：Shefounditdifficulttoconvincehim.Hefeltithisdutytotakecareofthem.It代表that引导的从句：Itookitforgranted(that)youwouldbecoming.It代表连接代（副）词引导的从句：Hehasn’tmadeitclearwhenheiscomingback.Theyhaven’tmadeitknownwherethemeetingistotakeplace.用it跟从句用法：1）it+be+形容词+从句：Itisnotcleartomewhyhebehavedlikethat.2）it+be+名词+从句:It’sapuzzlehowlifebegan.3）it+动词（+宾语）+从句Itdoesn’tmattermuchwherewelive.Itmakesnodifferencewhetherwegobytrainorbyboat.4）it+动词的被动语态+从句Itisnotdecidedwhowilleditit.5）it+动词be+that从句No,itcouldn’tbethattheywereinterestedinhim.6）It+be+一点时间+when…ItwasChristmasEvewhenIgotthenewsofhisbeingkilledinacarcrash.7）It+be+一段时间+since…Itis/hasbeenthreeweeksinceIlastheardfromhim.8）Itistimetodo/that…(谓语用过去时态）Itistimeforustogivethehouseathoroughcleaning.Itistimethatwegavethehouseathoroughcleaning.9）It+be+thefirst/secondtimethat…(谓语动词用完成时态）ItisthefirsttimeinhistorythattwoNobelPrizeshavebeenawardedtothesameperson.10）Ittakessb.Timetodo…IttookMary20minutestochooseasuitabledressfortheparty.NancysawyoursisterinTokyolastweek.ItwasNancywhosawyoursisterinTokyolastweek.ItwasyoursisterwhomNancysawinTokyolastweek.ItwasinTokyothatNancysawyoursisterlastweek.ItwaslastweekthatNancysawyoursisterinTokyo.It用于强调句结构：It+动词be+强调部分+who(whom)/that+其他部分it可以用来对句子的某一成分加以强调。有些否定句也可以改成这种强调结构：Ididn’thearfromheruntillastsummer.Itwasn’tuntillastsummerthatIheardfromher.Ididn’tdoallthisformyself.Itwasn’tformyselfthatIdidallthis.问句也可变成这种结构：Whocalledhim“comrade”?Whowasitthatcalledhim“comrade”?Howdidyouforgettolockthedoor?Howwasitthatyouforgottolockthedoor?Ex:把下列句子改为强调句：1.Petersawhisfriendintheparkyesterday.2.Ididn’treceivemyletteruntilyesterday?4.Didithappenin1980?5.WhydoeseveryonethinkI’mnarrow-minded?1.Petersawhisfriendintheparkyesterday.ItwasPeterwhosawhisfriendintheparkyesterday.ItwashisfriendwhomPetersawintheparkyesterday.ItwasintheparkthatPetersawhisfriendyesterday.ItwasyesterdaythatPetersawhisfriendinthepark.2.Ididn’treceivemyletteruntilyesterday?Itwasn’tuntilyesterdaythatIreceivedmyletter.4.Didithappenin1980?Wasitin1980thatithappened?5.WhydoeseveryonethinkI’mnarrow-minded?WhywasitthateveryonethinksI’mnarrow-minded?；足球比分足球比分；他の眼里,也根本算不得什么,所以他就是这样の无所谓,并不是太在意.根汉の心境,俨然已经到了这种地步了,要是自己现在能够成为绝强者,都会兴奋の睡不着觉了,何况还是准至尊呢.不过也