,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,It,的用法,It的用法,1,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,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，,2,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,Its quite hot here in summer,isnt it?,Its early midnight now.Wed better go to bed.,Its about an hours drive from here to Nanchang.,It was noisy last night.,Do you like it here,？,Oh,yes.The air,the weather,the way of life.,Everything is so nice.,(,天气,),(,时间,),(,距离,),（情况）,(,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,3,指代性别不详的婴幼儿,他她是谁？,Who is it?,指代说话者心目中不太清楚的那个人,-,-Who is knocking at the door?,-Its may be Tom.,The baby is crying.,It,might be hungry.,“Who is it over there?”,“It must be headmaster.”,“No,it cant be him,for he has gone to Paris.”,指代性别不详的婴幼儿他她是谁？Who is it?指代说话,4,I.,人称代词,a.,用作人称代词，代替前文提到过的事物，以避免重复,:,Throw wasted paper in the dustbin.Its just beside you.,b.还可以指代前面整件事情：,This spade is made of iron.It is known to all.,2,.,指示代词,(在回答含有指示代词thisthat的问句时，常用it指代),-Who is that?-It is Lucy.,Whats that on the,right,?I,g,uess it,might,be a,watermelon,.,“Hello!Who is that(speaking)?”,“This is john/I(speaking).,此处不能用,it,代,this,I.人称代词,5,it,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,),I had a good pen,but I lost,it,yesterday.Ill buy,one,tomorrow.,注,1:,it,one,that,区别,it 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,6,The Parkers bought a new house but _ will need a lot of work before they can move in.,A.they B.it C.one D.which,2.Weve been looking at houses but havent found _ we like yet.,A.one B.ones C.it D.them,3.Im moving to the countryside because the air there is much fresher than _ in the city.,A.ones B.one C.that D.those,易误辨析,:,it/one/that,B,A,C,the house that the Parkers bought,a house,the air,The Parkers bought a new house,7,Exercises,:,1.-would you like to buy a bicycle of this kind?,-Yes,Id like to have_.,A.it B.that C.one D.this,2.The color of my coat is different from_of yours.,A.it B.one C.that D.this,3.The machines we use today are much better than _we use ten years ago.,A.it B.that C.one D.those,4.These shoes are too tight,do you have large_?,A.it B.that C.ones D.one,Exercises:,8,定语从句,1.Is this the factory _ her mother worked last year?,A.the one B.that C.where D.which,2.Is this factory _ her mother worked in last year?,A.the one B.that C.where D.which,3._clean the blackboard is to be praised.,A.Anyone who B.The boy C.The one D.the ones,定语从句,9,1,.Sb+think +it +necessary+(for sb.)to do st,h.,+连词+,clause,The chairman thought _ necessary to invite Professor Smith to speak at the meeting.,A.that B.it C.this D.him,Sentence patterns,:,B,形式宾语,makebelievefeelfindconsider,hardpossibleimportantuselessworthworthwhile,Translation:,我们认为你什么时候出发并不重要,。,We consider it unimportant when you set out.,The chairman thought _ neces,10,2.S+V+it +ones duty+(for sb.)to do sth.,+连词+clause,3.S+V+it+no+n+doing sth.,(need 除外）,形式宾语,I think it his duty to clean the blackboard.,Sentence patterns:,an honour,a pity,a shame,a good idea-,no usegoodpointharm-,1.作为医生，我们觉得救死扶伤是我们的职责。,2.他们相信适当锻炼身体毫无坏处。,Traanslation,As doctors,we feel it our duty to save the dying and treat the wounded.,They believe it no harm doing the exercsie appropriately.,11,I like _ in the autumn when the weather is clear and bright.,A.this B.that C.it D.one,点拨:这是it作形式宾语的一种特殊用法.少数动词(如like,love,enjoy,dislike,hate,dont mind,appreciate,feellike等)或包含介词的动词短语(如see to,depend on,be fond of等)后接宾语从句,必须先由it担任形式宾语,再接从句.,I like(enjoy,hate)it when.,I would appreciate it if,see to(depend on)it that,Sentence patterns,:,C,形式宾语,I like _ in the autumn when,12,点拨:这也是it作形式宾语的一种特殊用法.少数动词短语中包含it作形式宾语,其结构为：,sb owe it to sb+连词+clause 把归功于,bring it to sb+连词+clause 把带给某人,leave it to sb to do+连词+clause 把留给某人去做,take it for granted+连词+clause 某人想当然,keep it in mind+连词+clause 牢记,形式宾语,She took _ for granted that he was liked by all the people.A.this B.that C.it D.one,C,Sentence patterns,You can leave the chores to me if you are busy.,Please keep it in mind that you are a chinese man.,She owed it to me that she is getting better and better,.,点拨:这也是it作形式宾语的一种特殊用法.少数动词短语中包含,13,Sentence patterns:,形式宾语,sb think it adj for sb to do+连词+clause,sb think it n for sb to do+连词+clause,sb think it no n(usegood-)doing(except need),sb appreciate it+连词+clause,sb leave it to sb to do+连词+从句,sb owe it to sb+连词+clause,sb bring it to sb+连词+clause,sb take it for granted+连词+clause,sb keep it in mind+连词+clause,sb think it adj for sb to do+连词+clause,sb think it n for sb to do+连词+clause,sb think it no n(usegood-)doing(except need),sb appreciate it+连词+clause,sb leave it to sb to do+连词+从句,sb owe it to sb+连词+clause,sb bring it to sb+连词+clause,sb take it for granted+连词+clause,sb keep it in mind+连词+clause,sb think it adj for sb to do+连词+clause,sb think it n for sb to do+连词+clause,sb think it no n(usegood-)doing(except need),sb appreciate it+连词+clause,Sentence patterns:形式宾语sb think,14,It,常可代替不定式（短语）、动名词（短语）或从句在句中作形式宾语，