it的用法和练习(带答案).doc

1、重点代词it的用法和练习（含答案）(1)it用做人称代词的用法 it用作代词，意为“它”，既可以指人，也可以指物。it做人称代词，可以用来代替一个名词、短语、从句或句子，以避免他们在句中的重复。这是可以指提到过的，也可以指未提到的，在句中做主语、表语和宾语。1)指事物，it可以知道除人以外的任何事物或动物。I dropped my watch and it broke.我把手表掉在地上摔坏了。2)指人，it主用用于指性别不明的婴儿或只听其声不见其人的人，如：Is it a boy or a girl?是男孩还是女孩？There is a knock on the door. It must b

2、e the postman.“Listen. Someone is crying.” “Oh, it must be Mary.”3） 代替某些代词。代词it可以用于代替指示代词this, that以及复合不定代词something, anything, nothing等，如：“Whats this?” “Its a new machine”(2)it用作非人称代词的用法1)it用作非人称代词主要用来指时间、距离、价值、天气、气温及温度等自然现象。如Its too late to go there now.现在去那已经太迟了。It rained all day yesterday.昨天下了一整

3、天雨。2)用于某些句型。Its time for sth. 该做某事了。Its to do sth. 是时候该做某事了。Its time for sb to do sth. 某人该干某事了。Its (about/high) time +that-从句。某人该做某事了。（从句谓语用过去式，有时候用should+动词原形）Its first(second)time +that-从句。某人第几次干某事。（从句谓语动词用现在完成时）Its +时间段+since从句。自从以来有一段时间了。Its +时间段+before 从句。过多长时间才(3)it用作形式主语的用法。1)当不定式、动名词、从句等复杂成分

4、做句子主语时，为保持句子的平衡，通常把真正的主语放在句末，而句首使用形式主语it。如Its very important to remember this.Its hard work climbing mountains.Its unknown when he will come.2)it用作形式主语的重要句型。It+be+adj.+for(of)sb to do sth. 某人做某事It is hard for him to make up his mind.他很难下定决心。It was foolish of her to say such a thing.她说那样的话，太愚蠢了。提示：此句

5、型中的介词of和for的区别是：of用于指某人的性格，属性，特征等。介词for表示对象，意为“对来说”。It takes/took sb+时间段+to do sth.某人做某事花了时间。It took me two hours to finish my homework.It is up to sb to do sth.该由某人做某事了。Its up to you to make the choice.该由你来做选择了。It looks(seems,appears,happens,occurs) that (as if) 似乎It seems as though he didnt recogn

6、ize me.(4)it用作形式宾语的用法。1)当不定式、动名词、从句等复杂成分用作宾语且后面跟有宾语补足语时，通常会在宾语补足语前使用it作形式宾语，而将真正的宾语移至句末。其基本结构为“动词+it+宾语补足语+不定式（动名词或从句）”I find it difficult to do the job well.I think it best that you should stay here.We think it no use complaining.2)用作形式宾语的几个特殊结构：动词+it+that-从句I think it (that) he will come on time.动

7、词+it+when(if)-从句We rally appreciate it when she offered to help.动词+prep.+it+that-从句I cant answer for it that he will come.我不能保证他会来。动词+it+介词短语+that-从句I took it for granted that he would help us.(5)it在强调句中的用法。强调句的基本结构是：It+be+被强调部分+that(who)+其他部分。It was a computer that he bought last week.练习部分1. I like

8、 in the autumn when the weather is clear and bright. A. this B. that C. it D. one解析 C.句中like为及物动词,后面需要跟宾语.而like之后不可直接接从句作宾语.it可用于某些动词(hate, appreciate)和介词之后作笼统宾语.2. He was nearly drowned once. When was ? was in 1998 when he was in middle school.A. that; It B. this; This C. this; It D. that; This解析A.

9、 第一空用that指代上文提到的事情; 第二空用it指代第一空的that3. 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解析 B此处it指代前面出现的a new house. it指代上文提到的同一事物,为特指;而one通常指代同类事物中的某一个.4. Someone is ringing the doorbell. Go and see .A. who is he B. who he is C. who is i

10、t D. who it is解析 D此处it用作人称代词,指不明身份,性别的人;宾语从句应用陈述语序.5. In fact is a hard job for the police to keep order in an important football match.A. this B. that C. there D. It 解析 D此处it用作形式主语.6. Mikes mother kept telling him that he should work hard, but didnt help.A. he B. it C. she D. which解析 B此处it用以指代前面的句子

11、,可用that替换.7. Since you have repaired my computer, is no need for me to buy a new one.A. it B. there C. this D. that解析 B考查固定句型 There is no need for sb to do sth8. The official made clear that he would do everything possible to solve the problem.A. it B. this C. that D. him解析 A此处 it用作形式宾语.9. Do you li

12、ke here? Oh, yes, the air, the weather and the way of life. Everything is so nice.A. this B. there C. that D. it解析 D此处 it泛指自然环境.10. Bills aim is to inform the viewers that cigarette advertising in TV is illegal, ?A. isnt it B. is it C. isnt he D. is he 解析A主语为 “ Bills aim”.11. is mentioned above, the

13、 number of the students in senior high school is increasing.A. which B. As C. That D. It解析 B非限制性定语从句中, as /which均可指代整句话的内容,但 which只能放在主句后,译为 “这一点”; as则位置灵活,译为 “正如”.12. It was with great joy he received the news that his lost daughter had been found.A. because B. which C. since D. that解析 D考查强调句型.13.

14、It was back home after the experiment.A. not until midnight did he go B. until midnight that he didnt go C. not until midnight that he went D. until midnight when he didnt go解析 C考查not until结构强调句型.14. Why! I have nothing to confess. You want me to say?A. What is it that B. What it is that C. How is it that D. How it is that解析 A考查强调句型的特殊疑问句句式.15. It is the ability to do the job matters not where you come from or what you are.A. one B. that C. what D. it解析 B考查强调句型.被强调部分是not where you come from or what you are (but ) the ability to do the job.为了平衡结构,