it基本用法复习.ppt

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1、It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。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,Ic

2、an’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’stwomil

3、estothebeach.非人称代词it：It用于代替指示代词：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。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。H

4、isyoungersisteristallerthantheelderone.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。Th

5、estyleofthebuildingissimilartothatofatemple.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.Thewindowsofyourflatarecleane

6、rthanthoseofmine.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

7、，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.“Apenny

8、savedisapennyearned.”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