1、“it”“it”的用法的用法itit可用来指代前文提到的人可用来指代前文提到的人,物或事物或事情情,也可以用来指时间也可以用来指时间,金钱金钱,距离距离,天天气等自然现象气等自然现象一、一、it 做代词做代词:1.it作人称代词作人称代词.指指前文前文提到的事物提到的事物，以避免重复以避免重复:ShantouShantou is a beautiful city,isnt is a beautiful city,isnt itit?.指指不明性别的不明性别的婴儿婴儿或不明身份的人或不明身份的人:LookLook，thats a thats a babybaby!ItIt looks like
2、a doll.looks like a doll.Is Is thisthis your wallet?No,your wallet?No,itit isnt.isnt.代替指示代词代替指示代词this/thatthis/thatThere is a There is a catcat on the desk.on the desk.ItIt looks like a hat.looks like a hat.WhoWho is knocking at the door?is knocking at the door?It It must be Bill.must be Bill.2.2.非人
3、称代词非人称代词itit.指天气：指天气：ItIt is a lovely day,isnt it?is a lovely day,isnt it?.指时间指时间:ItIt was nearly midnight when she came back.was nearly midnight when she came back.指环境指环境:ItIt was very quiet in the caf.was very quiet in the caf.指距离：指距离：ItIt is half an hours walk to the city centre.is half an hours
4、walk to the city centre.1.Theres only one vase here.Do you 1.Theres only one vase here.Do you want to buy _?want to buy _?2.We have more than a pen in our shop.2.We have more than a pen in our shop.Do you want _?Do you want _?3.The cost of hiring a house in 3.The cost of hiring a house in central Xi
5、an is higher than _ central Xian is higher than _ in any other area of the city?in any other area of the city?itonethat同物，特指同物，特指其中之一，泛指其中之一，泛指同类异物，特指同类异物，特指 it,that,this,one(s),or those4.There is a river along the village._ is a river with a long history.5.My mother bought me a new dictionary and h
6、er mother will buy her _ too.6.Bikes made in Shanghai are better than the _ made in Changsha.7.The students in my class are stronger than _ in Class 1.Itoneonesthose二、二、it 做引导词做引导词6 6个主句中常用的动词：个主句中常用的动词：think,believe,make,find,consider,feelthink,believe,make,find,consider,feel；1.it1.it做做形式宾语形式宾语结构：结
7、构：主语主语+动词动词+(+(形式宾语形式宾语)it+()it+(宾语补足语宾语补足语)形容词或名词形容词或名词 +(+(真正宾语真正宾语)不定式或动名词或宾语从句不定式或动名词或宾语从句。We We thinkthink itit our dutyour duty to clean our classroomto clean our classroom.I I feltfelt itit no useno use arguing with himarguing with him.They They foundfound itit difficultdifficult that they wo
8、uld finish that they would finish their work in two days.their work in two days.I I considerconsider it it very interesting very interesting to study to study English.English.HeHe made made itit a rule a rule that we should keep silent that we should keep silent in class.in class.三、三、it做做形式主语形式主语:It
9、 is very clear that hes round and tall It is very clear that hes round and tall like a tree.like a tree.=That hes round and tall like a tree is=That hes round and tall like a tree is very clear.very clear.It is kind of you to say so.=You are kind It is kind of you to say so.=You are kind to say so.t
10、o say so.It is important for her to come to the party.It is important for her to come to the party.=It is important that she(should)come to the=It is important that she(should)come to the party.party.It is a pity that such a thing(should)happen in It is a pity that such a thing(should)happen in your
11、 class.your class.It is a pity that he is ill.It is a pity that he is ill.It is time that children should go to bed.It is time that children should go to bed.=It is time that children went to bed.=It is time that children went to bed.It is suggested that the meeting(should)be put It is suggested tha
12、t the meeting(should)be put off.off.It was ordered that we(should)arrive there in It was ordered that we(should)arrive there in two hours.two hours.1 1.It is.It is/was/was the first the first (second.)(second.)time that.time that.ItIt is is the first time I the first time I have been have been here.
13、here.=This=This isis the first time I the first time I have been have been here.here.2 2.It happens.It happens (seems(seems，appears,appears,comes about,comes about,turns out,turns out,looks)looks)that.that.It happened(so happened)that he met his It happened(so happened)that he met his teacher in the
14、teacher in the street.street.It seems that he will be back in a few days.It seems that he will be back in a few days.ItIt waswas the first time I the first time I hahad d been been here.here.3 3.It takes sb.It takes sb.+时间时间 to do sth.to do sth.花某人时间做花某人时间做It took thousands of people many years to b
15、uild the Great Wall.4 4.It is no good.It is no good (use)(use)doing sth.doing sth.做某事没用做某事没用 It is no good learning English without speaking English.It seemed as if he were dying.6 6.It looks.It looks (seems)(seems)as if.as if.好像好像 It looks as if he is ill.（真的病了）（真的病了）It looks as if he were ill.（没有生
16、病）（没有生病）It doesnt matter if they are old.5 5.It doesnt matter whether.It doesnt matter whether (if)(if).是否是否没关系没关系 We decide to make a rule for us room-mates to turn off the lights at 10:30 p.m.A.that B.this C.it D.one其他常见其他常见的带有的带有it的有用的结构的有用的结构(1)It is+adj+of/for+to.(2)It takes.some time to.(3)It is said/reported/.that(4).thinks/finds it easy/difficult/.to.C
