最基本的用法是人称代词课件

It的用法It的用法1It的用法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。E.g:Lookatthatcar.It’sgoingmuchtoofast.Eg2:Whereisthecarkey?----Iputitinyourdrawer.

也可以代表抽象的东西。E.g:It’sallmyfault.

也可以指动物或未知性别的婴儿。E.g:Whatabeautifulbaby---isitaboy?Eg2:Howaboutthebaby?----I’lltakecareofit.

还可代表一个彼此都知其何所指的东西。E.g:Wheredoesithurt?E.g2:Ifhedoesn’tcome,Ican’thelpit.Eg3:Youhavesavedmylife.Ishallneverforgetit.It的用法2非人称代词itIt用于代替指示代词，It可以表示“是谁（在某处或做某事）”e.g:“Who’sthat?”“It’sme.”E.g2:It’syourmotheronthephone.E.g3:“Why,it’syou!”shecried.It还可以用来泛指某件事。E.g:Isn’titawful! E.g2: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.E.g:It’sraining.E.g2:It’sTuesdaytoday.E.g3:It’squiethere.Eg4:It’stwomilestothebeach.非人称代词it3替代词one,ones,that,those,it,this,thatone,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。E.g: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。E.g:Hisyoungersisteristallerthantheelderone.Ineedtheplasticbags,notthepaperones.替代词one,ones,that,those,it,4ThecomputersinourschoolareconnectedtotheInternetwhilethoseintheirschoolaren’t.Thefootballplayersonourteamseemtobemoreenergeticthanthoseonyourteam.That/those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。E.g:Thestyleofthebuildingissimilartothatofatemple.ACDplayermadeinJapancostsmorethanonemadeinHongKong.Thecomputersinourschoolar5That/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.E.g:Ilikethevasebetterthantheone/thatinanothershop.Thewindowsofyourflatarecleanerthanthoseofmine.Agrandparent’sjobiseasierthanthatofaparent.That/those一般不带前置定语，但必须有后置定语。O62)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。E.g: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。2)it,this和that7E.g: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。E.g:Listentothis!Wewillhavethreedaysoff.“Apennysavedisapennyearned.”Whosaidthat?E.g:Wekeeptheicecreammac83)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。E.g:IboughtadictionarythreeyearsagoandIamstillusingitnow.IboughtadictionarythreeyearsagobutIamgoingtobuyanewonesoon.3)It和one9形式主语it有下面几种类型：Be+形容词+不定式e.g:It’sbettertobeearly.Be+名词+不定式e.g:Itwashisdutytotakecareoftheorphans.

Be+介词短语+不定式e.g:It’sbeyondmetosaywhy.

It+及物动词+宾语+不定式e.g:Itmakesmesicktothinkaboutit.

Be+名词+动名词

e.g:It’snogoodstandinghereinthecold.

Be+形容词+动名词

eg:It’shelplesstryingtoconvinceher.

其他结构+动名词

e.g:Itdoesn’tmatterwaitingafewmoredays.

形式主语it10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：e.g:Itisnaturalthattheyshouldhavedifferentviews. it+be+名词+that从句:e.g:It’sashamethatyou’resick.it+动词（+宾语）+that从句

e.g:Ithappenedthatshewasn’tinthatday.Eg2:Itneveroccurredtomethatperhapsshewaslying.It+动词的被动语态(said/believed/thought/expected/reported/known+that从句

e.g:It’ssaidthattherehasbeenanearthquakeinIndia.用于由that引导的主语从句，有下面几种类型：11形式宾语it:it可以代表不定式：e.g:Shefounditdifficulttoconvincehim.Eg2:Hefeltithisdutytotakecareofthem.It代表that引导的从句：e.g:Itookitforgranted(that)youwouldbecoming.It间或代表连接代（副）词引导的从句：E.g:Hehasn’tmadeitclearwhenheiscomingback.Eg2:Theyhaven’tmadeitknownwherethemeetingistotakeplace.形式宾语it:12用it起始的句型归纳：1）it+be+形容词+从句： e.g:Itisnotcleartomewhyhebehavedlikethat.2）it+be+名词+从句: e.g:It’sapuzzlehowlifebegan.3）it+动词（+宾语）+从句e.g:Itdoesn’tmattermuchwherewelive.eg2:Itmakesnodifferencewhetherwegobytrainorbyboat.4）it+动词的被动语态+从句e.g:Itisnotdecidedwhowilleditit.用it起始的句型归纳：135）it+动词be+that从句e.g:No,itcouldn’tbethattheywereinterestedinhim.6）It+be+一点时间+when…E.g:ItwasChristmasEvewhenIgotthenewsofhisbeingkilledinacarcrash.7）It+be+一段时间+since…E.g:Itis/hasbeenthreeweeksinceIlastheardfromhim.8）Itistimetodo/that…(谓语用过去时态）E.g:Itistimeforustogivethehouseathoroughcleaning.Itistimethatwegavethehouseathoroughcleaning.5）it+动词be+that从句149）It+be+thefirst/secondtimethat…(谓语动词用完成时态）E.g:ItisthefirsttimeinhistorythattwoNobelPrizeshavebeenawardedtothesameperson.10）Ittakessb.Timetodo…E.g:IttookMary20minutestochooseasuitabledressfortheparty.9）It+be+thefirst/secondt15There起始的句型归纳：1）therelive/stand/lie/exist…E.g:Therestandsabigtreeattheentrancetothetemple.Therelayaditchtwometreswideahead.2)Therecome/go/appear/occur/follow…用于描述某事的发生或某个动作的开始。E.g:Therewillfollowabreakof10minutesandthenwewillgoonwiththelecture.There起始的句型归纳：163)Therebeing…（独立主格结构）E.g:Therebeingnothingleftinthefridge,wehadtodosomeshoppingfirst.4)…theretobe结构常见于动词intend,mean,consider,hate,want等词后。E.g:Noonewouldexpecttheretobeawarinhiscountry.Idon’twanttheretobeanotheraccidentlikethis.

3)Therebeing…（独立主格结构）175)Thereisnoneedtodo…E.g:Thereisnoneedtowaitforthebussincewecantakeyouinourcar.若名词是use,good,harm,sense,point时Thereisno+名词+indoing…E.g:Thereisnopointinarguingwithhim.Hewon’tlistentoanyone.6)Thereappear/seem/islikely/iscertaintobe…E.g:Thereseemstobesomethingwrongwiththeelectricfan.Thereislikelytobemorepeopleatthespeechcontestthanexpected.5)Thereisnoneedtodo…18It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。

Eg:NancysawyoursisterinTokyolastweek.

ItwasNancy

whosawyoursisterinTokyolastweek.Itwasyoursister

whomNancysawinTokyolastweek.Itwas

inTokyo

thatNancysawyoursisterlastweek.Itwas

lastweek

thatNancysawyoursisterinTokyo.It用于强调句19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?有些否定句也可以改成这种强调结构：20Ex:把下列句子改为强调句：1.Tombrokethewindow

last

night.2.Theywantmoney.3.Petersawhisfriend

inthepark

yesterday.4.Ididn’thaveanopportunityofseeingheragainfor

severalyears.5.WhydoeseveryonethinkI’mnarrow-minded?6.Ididn’treceivemyletteruntil

yesterday?7.DidDickcallthemeetinglastweek?8.Didithappenin1980?Ex:把下列句子改为强调句：21It的用法It的用法22It的用法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。E.g:Lookatthatcar.It’sgoingmuchtoofast.Eg2:Whereisthecarkey?----Iputitinyourdrawer.

也可以代表抽象的东西。E.g:It’sallmyfault.

也可以指动物或未知性别的婴儿。E.g:Whatabeautifulbaby---isitaboy?Eg2:Howaboutthebaby?----I’lltakecareofit.

还可代表一个彼此都知其何所指的东西。E.g:Wheredoesithurt?E.g2:Ifhedoesn’tcome,Ican’thelpit.Eg3:Youhavesavedmylife.Ishallneverforgetit.It的用法23非人称代词itIt用于代替指示代词，It可以表示“是谁（在某处或做某事）”e.g:“Who’sthat?”“It’sme.”E.g2:It’syourmotheronthephone.E.g3:“Why,it’syou!”shecried.It还可以用来泛指某件事。E.g:Isn’titawful! E.g2: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.E.g:It’sraining.E.g2:It’sTuesdaytoday.E.g3:It’squiethere.Eg4:It’stwomilestothebeach.非人称代词it24替代词one,ones,that,those,it,this,thatone,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。E.g: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。E.g:Hisyoungersisteristallerthantheelderone.Ineedtheplasticbags,notthepaperones.替代词one,ones,that,those,it,25ThecomputersinourschoolareconnectedtotheInternetwhilethoseintheirschoolaren’t.Thefootballplayersonourteamseemtobemoreenergeticthanthoseonyourteam.That/those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。E.g:Thestyleofthebuildingissimilartothatofatemple.ACDplayermadeinJapancostsmorethanonemadeinHongKong.Thecomputersinourschoolar26That/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.E.g:Ilikethevasebetterthantheone/thatinanothershop.Thewindowsofyourflatarecleanerthanthoseofmine.Agrandparent’sjobiseasierthanthatofaparent.That/those一般不带前置定语，但必须有后置定语。O272)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。E.g: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。2)it,this和that28E.g: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。E.g:Listentothis!Wewillhavethreedaysoff.“Apennysavedisapennyearned.”Whosaidthat?E.g:Wekeeptheicecreammac293)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。E.g:IboughtadictionarythreeyearsagoandIamstillusingitnow.IboughtadictionarythreeyearsagobutIamgoingtobuyanewonesoon.3)It和one30形式主语it有下面几种类型：Be+形容词+不定式e.g:It’sbettertobeearly.Be+名词+不定式e.g:Itwashisdutytotakecareoftheorphans.

Be+介词短语+不定式e.g:It’sbeyondmetosaywhy.

It+及物动词+宾语+不定式e.g:Itmakesmesicktothinkaboutit.

Be+名词+动名词

e.g:It’snogoodstandinghereinthecold.

Be+形容词+动名词

eg:It’shelplesstryingtoconvinceher.

其他结构+动名词

e.g:Itdoesn’tmatterwaitingafewmoredays.

形式主语it31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：e.g:Itisnaturalthattheyshouldhavedifferentviews. it+be+名词+that从句:e.g:It’sashamethatyou’resick.it+动词（+宾语）+that从句

e.g:Ithappenedthatshewasn’tinthatday.Eg2:Itneveroccurredtomethatperhapsshewaslying.It+动词的被动语态(said/believed/thought/expected/reported/known+that从句

e.g:It’ssaidthattherehasbeenanearthquakeinIndia.用于由that引导的主语从句，有下面几种类型：32形式宾语it:it可以代表不定式：e.g:Shefounditdifficulttoconvincehim.Eg2:Hefeltithisdutytotakecareofthem.It代表that引导的从句：e.g:Itookitforgranted(that)youwouldbecoming.It间或代表连接代（副）词引导的从句：E.g:Hehasn’tmadeitclearwhenheiscomingback.Eg2:Theyhaven’tmadeitknownwherethemeetingistotakeplace.形式宾语it:33用it起始的句型归纳：1）it+be+形容词+从句： e.g:Itisnotcleartomewhyhebehavedlikethat.2）it+be+名词+从句: e.g:It’sapuzzlehowlifebegan.3）it+动词（+宾语）+从句e.g:Itdoesn’tmattermuchwherewelive.eg2:Itmakesnodifferencewhetherwegobytrainorbyboat.4）it+动词的被动语态+从句e.g:Itisnotdecidedwhowilleditit.用it起始的句型归纳：345）it+动词be+that从句e.g:No,itcouldn’tbethattheywereinterestedinhim.6）It+be+一点时间+when…E.g:ItwasChristmasEvewhenIgotthenewsofhisbeingkilledinacarcrash.7）It+be+一段时间+since…E.g:Itis/hasbeenthreeweeksinceIlastheardfromhim.8）Itistimetodo/that…(谓语用过去时态）E.g:Itistimeforustogivethehouseathoroughcleaning.Itistimethatwegavethehouseathoroughcleaning.5）it+动词be+that从句359）It+be+thefirst/secondtimethat…(谓语动词用完成时态）E.g:ItisthefirsttimeinhistorythattwoNobelPrizeshavebeenawardedtothesameperson.10）Ittakessb.Timetodo…E.g:IttookMary20minutestochooseasuitabledressfortheparty.9）It+be+thefirst/secondt36There起始的句型归纳：1）therelive/stand/lie/exist…E.g:Therestandsabigtreeattheentrancetothetemple.Therelayaditchtwometreswideahead.2)Therecome/go/appear/occur/follow…用于描述某事的发生或某个动作的开始。E.g:Therewillfollowabreakof10minutesandthenwewillgoonwiththelecture.There起始的句型归纳：373)Therebeing…（独立主格结构）E.g:Therebeingnothingleftinthefridge,wehadtodosomeshoppingfirst.4)…theretobe结构常见于动词intend,mean,consider,hate,want等词后。E.g:Noonewouldexpecttheretobeawarinhiscountry.Idon’twanttheretobeanotheraccidentlikethis.

3)Therebeing…（独立主格结构）385)Thereisnoneedtodo…E.g:Thereisnoneedtowaitforthebussincewe