《it用法详解》PPT课件.ppt

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1、It的用法代词：用于指人以外的一切生物，无生命的东西和事情日期，距离，价值，度量，温度，环境等it用作非人称代词，指代日期、时间、季节、天气、温度、距离、重量、环境、情况等，常不翻译出来It’squitehothereinsummer,isn’tit?It’searlymidnightnow.We’dbettergotobed.It’saboutanhour’sdrivefromheretoNanchang.Itwasnoisylastnight.—Doyoulikeithere？(2004年高考全国卷Ⅱ)—Oh,yes.Theair,thewea

2、ther,thewayoflife.—Everythingissonice.(天气)(时间)(距离)（情况）(环境等)指代性别不详的婴幼儿他她是谁？Whoisit?指代说话者心目中不太清楚的那个人---Whoisknockingatthedoor?---It'smaybeTom.Thebabyiscrying.Itmightbehungry.—“Whoisitoverthere?”—“Itmustbeheadmaster.”—“No,itcan’tbehim,forhehasgonetoParis.”I.人称代词a.用作人称代词，代替前文提到过的

3、事物，以避免重复:Throwwastedpaperinthedustbin.It'sjustbesideyou.b.还可以指代前面整件事情：Thisspadeismadeofiron.Itisknowntoall.2.指示代词(在回答含有指示代词thisthat的问句时，常用it指代)---Whoisthat?--ItisLucy.What’sthatontheright?Iguessitmightbeawatermelon.—“Hello!Whoisthat(speaking)?”—“Thisisjohn/I(speaking).此处不能用it

4、代thisit指代上文提到的表特指的单数可数名词或不可数名词，即“同类又同物”;one表示“同类不同物”,只能代替可数名词单数，相当于a/an+可数名词单数；还可以指众多中的一个（注意它在定语从句中的指代）(复数n用ones指代)that表示“同类不同物”，（只在平级结构或比较级结构或表对比结构中指代前文出现的表特指的可数名词单数或不可数名词。（复数名词用those指代)Ihadagoodpen,butIlostityesterday.I’llbuyonetomorrow.注1:it,one,that区别TheParkersboughtanewho

5、usebut___willneedalotofworkbeforetheycanmovein.A.theyB.itC.oneD.which2.We’vebeenlookingathousesbuthaven’tfound___welikeyet.A.oneB.onesC.itD.them3.I’mmovingtothecountrysidebecausetheairthereismuchfresherthan___inthecity.A.onesB.oneC.thatD.those易误辨析:it/one/thatBACthehousethatthe

6、ParkersboughtahousetheairExercises:1.---wouldyouliketobuyabicycleofthiskind?---Yes,I'dliketohave_________.A.itB.thatC.oneD.this2.Thecolorofmycoatisdifferentfrom__ofyours.A.itB.oneC.thatD.this3.Themachinesweusetodayaremuchbetterthan_____weusetenyearsago.A.itB.thatC.oneD.those4.

7、Theseshoesaretootight,doyouhavelarge___?A.itB.thatC.onesD.one√√√√定语从句1.Isthisthefactory_______hermotherworkedlastyear?A.theoneB.thatC.whereD.which2.Isthisfactory_______hermotherworkedinlastyear?A.theoneB.thatC.whereD.which3.______cleantheblackboardistobepraised.A.AnyonewhoB.Th

8、eboyC.TheoneD.theones√√√1.Sb+think+it+necessary+(forsb.)todos