高中英语语法权威解析二---“It”用法及其句型和固定搭配讲解(附练习题)

第二章“It”用法及其句型和固定搭配讲解

"It" 用法及其句型和固定搭配，是高中英语语法的重点、难点，又是近几年高考的热点，因此应给予充分的重视，现将it用法归纳如下：

一、It用作实词

表达以下概念:指代前文提到的事物，前文中的this, that；替代前文中的内容；指代一位性别不明的小孩或未知的人；指代未指明但谈话双方都知道的那件事；指代时间、天气、气候、距离等自然现象……

二、It用作形式主语

替代作主语的从句、动词不定式、动名词，而把真正作主语的从句、动词不定式、动名词置于句尾。

It 作形式主语的常见句型：

1. 代作主语的动词不定式，其句型为

(1) It be adj. (for sb.) to do sth.

此处adj. 通常为描述事件的形容词：easy, difficult, hard, necessary, unnecessary, possible, impossible, likely, unlikely, right, wrong, important, unimportant, legal, illegal, well-mannered, ill-mannered, polite, impolite, clear, obvious, certain, suitable, proper, fit, useful, useless, dangerous…

例It is illegal (for a teenager) to drive a car without a license.

(2) It be adj. of sb. to do sth.

此处adj. 通常为描述人的形容词：kind, unkind, nice, rude, cruel, considerate, thoughtful, thoughtless, careful, careless, silly, foolish, stupid, clever, wise, crazy.

例It's kind of you to help me with the problem.

(3) It替代作主语的动名词的常见句型

It's no good/use doing…

It's (well)worth doing…

It's (well)worth one's while doing/to do…

It's (well)worth while doing/ to do

例It's no use crying over spilt milk.

2. It替代作主语的从句常见句型

(1) It is + noun +从句

例It is no secret that the president wants to have a second term at office.

(2) It is adj. +clause

It's surprising that…(should)………竟然……

It's a pity/shame that…(should)………竟然……

例It's important that you should apologize to her for your rudeness.(=It's of much importance that you should apologize to her for your rudeness.)

(3) It verb sb. + clause= It is v-ing + clause

It+surprise/delight/interest/disappoint/worry/disturb/annoy/amaze

/bother/concern/frighten/please/anger sb. that…

例It worried me that she drove so fast.(= It was worrying that she drove so fast.)

(4) It verb (to sb.) that…= sb/sth verb to do

(verb = appear, seem, come about, emerge, follow, chance, happen, occur, transpire, turn out , work out)

例It (so) happened/chanced that they were out.(= They happened/chanced to be out.)

(5) It is v-ed that…=sb/sth is to do

(verb=say, report, think, believe, hope, expect, agree, accept, decide, determine, intend, plan, understand, know）

例It is said that the couple have gotten divorced.(=The couple are said to have gotten divorced.)

(6) It is v-ed that … (should)…

(verb=demand, request, require, order, suggest, advise, recommend

例It is suggested that they should begin with the third question.

三、It作主语的句型

1. It takes sb. …to do…(=sb takes…to do…)某人用多长时间做某事

例It took the men a week to mend our roof.(= The men took a week to mend our roof.)

2. It's (just)(un)like sb. to do…（不）像某人做某事的风格

例It was (just) like him to think of helping us.

3. It's (about/high) time that…should /v-ed…是该做某事的时候了

例It's(about/high) time that we should take action.

4. It's the x-th time (that) …have v-ed…第几次做某事了

例It's the third time that he has failed the driving test.

5. It is/has been…since …continuous v-ed(延续性动词) 某动作已有多长时间不发生了

例It's 10 years that he lived here

6. It was(not)…before…过(不)了多长时间某动作发生了

例It was not long before they arrived.

四、It 作形式宾语

用来替代作宾语的从句、动词不定式、动名词，而把真正作宾语的从句、动词不定式、动名词置于句尾。

It 作形式宾语的常见句型：

1. verb+ it+ adj./noun (for/of) to do/clause (verb=think, believe, suppose, consider, feel, make, keep…)

例I think it hard for you to do the task on your own./I think it hard that you'll do the task on your own.

2. verb+it+adj./noun (one's) doing (adj.=useless/worth/worthwhile)(noun=no use/no good/worth one's while/a waste of time/money/energy/words) (verb=think, believe, suppose, consider, feel, make, keep…)

例I'll make it worth your while telling me about his secret.

3. verb+it+ important/unimportant/necessary/unnecessary/natural/essential that … (should)…

verb+it+of much/great/no/little importance that…(should)…

(verb=think, believe, suppose, consider, feel, make, keep…)

例I think it important that you (should) attendthe conference.

4. verb + it+ as+ noun/adj.+ clause (verb=accept, regard, take, see, view)

例The lecturer takes it as encouraging when so many students attend his lecture.

5. v. +it + prep. + that…

owe it to sb. that…把…归功于…

leave it to sb that…把…留给某人去做

take it for granted that …想当然

keep it in mind that…

例Don't bother to arrange anything. Just leave it to me to sort out.

6. It用在不能直接跟宾语从句的动词后面，尤其是表示好恶的动词后，enjoy, like, love, dislike, resent, hate, don't mind, be fond of, feel like, see to 宾语从句紧跟it之后例I hate it you can swim so well and I can't.

7. It用在不能直接跟宾语从句的介词后面，宾语从句紧跟it之后（except that例外）

例I'm for it that you will follow their advice.

五、强调句型

It is/was+被强调部分+ that(who)…强调句型用来强调谓语动词以外的任何句子成分。当被强调部分是人时也可以用who。

在使用强调句型时需注意以下几点：

1. 请注意强调句型的特殊疑问句

例When was it that he changed his mind to take part in the activity？

2. 在强调原因状语从句时，只能强调由because所引导的从句

例It was because he was ill that he didn't come to school yesterday.

3. 在强调not …until结构时必须把not与until一起放到被强调的位置上

例It was not until she took off her dark glasses that I realized she was my brother.

4. 注意强调句型与定语从句的区别

例It was at 7 o'clock that he came here yesterday.( 强调句型)

It was 7 o'clock when he came here yesterday.(定语从句)

六、It 常用的固定搭配

1. make it

(1).在口语当中相当于succeed,表示：成功、做到、说定、赶上、及时到达

例It's hard to make it to the top in show business.

(2).在口语中相当于fix the date for,表示“约定好时间”

例—Shall we meet next week?

—OK. We just make it next Saturday.

2. as it is

(1).相当于in fact, in reality表示“事实上，实际情况是……”

例We had planed to finish the task today, but as it is we probably won't finish it until next week.

(2).相当于方式状语从句，表示“照原样”

例Leave the table as it is.

3. as it were 相当于as one might say, that is to say, 表示“也就是说，可以说，换句话说”

例He is, as it were, a modern Sherlock Holmes.

4. if it weren't for…/if it hadn't been for…用来引导虚拟语气，相当于without, or but for, 表示“如果不是……，要不是……”

例If it weren't for Tom, I wouldn't be alive today.

5. that's it

(1). 相当于That's all. That's so much. 表示“至此为止，没有别的了”

例You can have one more sweet, and that's it.

(2). 相当于That's right.表示“对啦”

例—I guess the key to the problem is thechoice “A”

—That's it.

6. catch it 在口语中，相当于be punished/scolded for doing sth. wrong. 表示“因做错事而挨骂，受责备，受批评，受惩罚”

例We'll really catch it form our teacher if we're late for class again.

7. have it

(1).相当于say, insist表示“说，主张，表明，硬说”

例Rumour has it that they are getting divorced.

(2).相当于get to know something,表示“了解，知道，获悉”

例I had it from John that she was going abroad.

8. have what it takes在口语中，相当于be well qualified for, 表示“具有成功的条件”

例You can take it from me that your daughter has what it takes to be a star.

9. so it seems / appears.

10. Keep at it! (Don't give up!)相当于go on,表示“继续做，不放弃”

例My teacher asked me to keep at it.

11. Go it! (Go on!) 拼命干, 莽撞

12. Now you have done it! (You have done sth. wrong.)

13. Now you'll catch it! (You'll be punished.)

14. As it happened, …在口语中，相当于it's a pity that…, 表示“真不凑巧，真遗憾”

例As it happened, they were out.

15. As it turned out,…在口语中，相当于it was found to be in the end, 表示“最后被证明是”

例As it turned out, his statement was false.

16. Such as it is(they are) 在口语中，相当于although it may not be worth much, 表示“虽然没有多大价值”

例You can borrow my exam notebook, such as it is.

17. Take it/things easy. 相当于Don't worry or don't hurry. 用来劝告别人，表示“不要慌，别担心，存住气”

例Take it easy! He will do it well.

18. Take it from me.在口语中，相当于believe me what I say.表示“请相信我的话，我敢担保”

例You can take it from me that he will make it this time.

19. For what it is worth…在口语中，相当于although I'm not sure it's of value, 表示“不管其价值如何”

例Here is the article I promise you, for what it's worth.

20. Worth it 在口语中，相当于useful, 表示“有好处，值得做”

例Don't hesitate about it! It's worth it.

21. Believe it or not.表示“信不信由你”

例Believe it or not, Tom is getting married to Mary next Sunday.

22. Take it or leave it. v. 要么接受要么放弃

例That is my last offer. You can take it or leave it.

23. It all depends/that all depends 在口语中，相当于it hasn't been decided yet, 表示“那得看情况，还没有定下来”

例—Are you going to the countryside for holiday?

—It/That all depends.

24. It's up to sb. 在口语中，相当于it's decided by sb. 表示“由……决定，由……负责，取决于……”

例—Shall we go out for dinner?

—It's up to you.

“It”用法及其句型和固定搭配专练

1. Was it during the Second World War_____ he died?

A.that

B.while

C.in which

D.then (88)

2. Is ____ necessary to complete the design before National Day?

A.this

B.that

C.it

D.he (89)

3. I don't think ____ possible to master a foreign language without much memory work.

A.this

B.that

C.its

D.it (91)

4.Does ______ matter if he can't finish the job on time?

A.this

B.that

C.he

D.it (91)

5. It was not _____ she took off her glasses _____ I realized she was a famous film star.

A.when , that

B.until , that

C.until , that

D.when , then (92)

6. I was disappointed with the film. I had expected ______ to be much better.

A.that

B.this

C.one

D.it (93)

7. It was not until 1920 ______ regular radio broadcasts began.

A.while

B.which

C.that

D.since (94)

8. ______is a fact that English is being accepted as an international language.

A.There

B.This

C.That

D.It (95)

9. It was only when I reread this poems recently _____ I began to appreciate their beauty.

A.until

B.that

C.then

D.so (97)

10. I hate_____when people talk with their mouths full.

A.it

B.that

C.these

D.them (98)

11. 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 (2000)

12.I like ___ in the autumn when the weather is clear and bright. (2004)

A. this

B. that

C. it

D. one

13. —Do you like ___ here?

—Oh, yes. The air, the weather, the way of life. Everything is so nice.(全国卷)

A. this

B. These

C. That

D. it

14. We needed a new cupboard for the kitchen. So Peter made ___ from some wood. (全国卷)

A. it

B. One

C. Himself

D. another

15. The foreign Minister said, " _____ our hope that the two sides will work towards peace."(2004北京)

A. This is

B. There is

C. That is

D. It is

16. _____ is reported in the newspaper, talks between the two countries are making progress. (2004北京)

A. It

B. As

C. That

D. What

17. —How often do you eat out?(2004, 天津)

—________, but usually once a week.

A. Have no idea

B. It depends

C. As usual

D. Generally speaking

18. We wanted to get home before dark, but it didn't quite _____ as planed. (2004浙江卷)

A. make out

B. turn out

C. go on

D. come up

19. — What do you want to do next? We have half an hour until the basketball game.

—________. Whatever you want to do is fine with me.

A. It just depends

B. It's up to you

C. All right

D. Glad to hear that

20. It was ____ back home after the experiment.

A. not until midnight did he go

B. until midnight that he didn't go

C. not until midnight that he went

D. until midnight when he didn't go

KEYS:

1-5 ACDDB 6-10 DCDBA 11-15 ACDBD 16-20 BBBBC

it 用法讲解与练习

it的用法 it用作实词（代词）和虚词（助词）。 一、代词：人称代词或者前文刚提到的人或事；作主语还可以表示时间、距离、天气、地点、温度等。 Who is it？It must be Mr. Smith. Where is my book? It is on the table. 1. My bike is missing. I can't find__ anywhere. A. one B. ones C. it D. that 2. ____ four years since I joined the Army. A. There was B. There is C. It was D. It is 3. Someone is ringing the doorbell. Go and see __. A. who is he B. who he is C. who is it D. who it is 二、虚词（高考考点）： 一）it用作形式主语 替代从句、动词不定式、动名词，把真正作主语的从句、动词不定式、动名词置于句尾。It替代作主语的不定式的常见句型 1. It be adj. (for sb.) to do sth. 2. It be adj. (of sb.) to do sth. 1）Everyone knows that _______ is dangerous to play with fire, but _______ is difficult is to prevent children from playing with fire. A. it, it B. what, what C. it, what D. what, it 2）I know_____ is important to know my own limitations, but _______ is difficult is to help others to know their own limitations. A. it, it B. what, what C. it, what D. what, it It替代作主语的动名词的常见句型 It’s no good/use doing… It’s (well) worth doing… It’s no use _over spilt milk. A. cry B. crying C. that you cry D. for you to cry It作形式主语替代主语从句 ①It is adj. +clause ②It is v-ed that…=sb./sth. is to do ③It is + noun +从句 1）______ was known to them all that William had broken his promise _____ he would give each of them a gift. A. As; Which B. What; that C. It; that D. It; which 2）_______certain that his invention will make people’s life convenient. A. That’s B. This is C. It’s D. What’s 3）_____ that their daughter got an opportunity to study abroad. A. It’s a exciting news B. This is an exciting news C. This is exiting news D. It’s exciting news 二）it作形式宾语 vt+it+宾补+真正的宾语（to do 不定式，v-ing，宾语从句）。常用的动词有think, believe, make, find, consider, feel，suppose，regard，take，imagine等。 14.The doctor thought ____would be good for you to have a holiday. （10全国Ⅱ） A. this B. that C. one D. it 33.The fact that she was foreign made _difficult for her to get a job in that country（10辽宁）A so B. much C. that D. it 三）用于强调句型中 1. “It is/was+被强调部分+that/who+句子的其他部分”。如果强调的是人,可以用who, whom 代替that。 2. It is not until + 被强调部分+ that ... 用于强凋时间状语，“直到……才……”。3. 强调句的一般疑问句句型： Is / Was +it +所强调的部分+that / who/ whom +其余部分? 4. 强调句的特殊疑问句句型： 特殊疑问词+is\was it + that / who +其余部分? 三、高考习题 1. I dislike ____when others laugh at me in public or think poorly of me behind. A. that B. those C. it D. them enjoy, like, dislike, love, hate, prefer, appreciate 等表示喜恶的动词。 2. I hate __ if people say such things in public. A. that B. those C. it D. them 3. ”Excuse me, I want to have my watch fixed, but I can't fi nd a repair shop.“ ”I know ______ nearby. Come on, I'll show you.“ A. one B. it C. some D. that it = the + 名词，one = a + 名词。 4. There is only one English-Chinese dictionary in that book-shop. I wonder if you still want to buy __. A. it B. one C. another D. any 5. Will you see to see to （负责，注意）“ _______ that my children are taken good care of while I am away? A. it B. me C. yourself D. them 类似see to 用法的短语还有depend on,

It作形式主语常见用法

It作形式主语常见句型 1.It + be +形容词+ that-从句 可用于此句型的形容词有: wonderful, true，good，right，wrong，（un）important，useless，surprising，disturbing,frightening,alarming,clear，unusual，lucky，certain, necessary等。如： ①It is quite certain that he will be at the meeting.他将出席会议是无疑的。 ②It is surprising that he came late to school this morning.他今天早上迟到真令人惊讶。 ③It is important that we (should) study hard.我们努力学习是很重要的。 注意: 该句型中的形容词是（un）important, necessary等时，从句应为(should )+动词原形。 It is important that we (should) learn English well. It is necessary that he (should) rember these words. 2.It + be +名词+ that-从句 适用该句型的名词（词组）有: a pity，an honor，a good thing，a fact，a surprise，a question,a shame,a custom, a truth,our hope, no wonder, good/bad manners等。如： ①It is a pity (that) you missed the sports meeting last week.你错过了上周的运动会太可惜了。 ②It is a fact that Engl ish is being accepted as an international language.事实上英语已经被作为一种国际语言而接受了。

2011届高考英语一轮复习讲解：it的用法

2011届高考英语一轮复习讲解：it的用法【知识要点】 It的用法 （一）作人称代词 1、it代替前面（或后面）的单数名词或分句等所表示的事物。 e.g. You cannot eat your cake but have it.（it代替前面的cake） Although we cannot see it, there is air all around us. （it代替后面的air） They say he has left town, but I don’t believe it.（it代替前面They…town分句中的情况） 2、代替有生命但不能或不必分阴阳性的东西（包括婴儿）。 e.g. Yesterday we saw a big tree. It was fully twenty metres high. （it代替前面的tree） The baby cried because it was hungry. （it代替前面的baby） 3、在某些习惯说法中，可以代替人。 e.g. ---- Someone is knocking at the door, Peter. ---- Who is it? ---- It’s me. ---- Who are singing? ---- It is the children. ---- The light is still on in the lab. It must be the third-year students doing the experiment. 4、it与one的区别：这两个词都可以代表前面说过的名词，但it用于同名同物的场合；one则用于同名异物的场合。 e.g. ---- Do you still have the bicycle? ---- No, I have sold it. ---- Is this knife yours? ---- No. It is Xiao Zhang’s. Mine is the one on the desk. 5、it与that的区别：两词都可代替某一特定名词，但that指同一类，并非同一个。 e.g. The climate of South China is mild（温和的）; I like it very much.（it指the climate of South China） The climate of South China is much better than that of Japan.（that指the climate）（二）作无人称代词 it作无人称代词时，除了句中找不到它所代表的词语外，另一个特点是它后面的内容都是表示天气、时间、距离、度量衡及情况等。 It is fine (rainy, windy, etc.). It is noon. It is a half hour’s walk to the f actory. It is eighteen square metres in area. What does it matter? （三）作强调词，构成强调结构

it的用法归纳

?Never be afraid of grammar ?Collect some examples; ?Watch them very carefully; ?Find out something in common; ?Try to use the rules ---- practise. it用法完全归纳 一、it 作人称代词的用法 1.指事物 作为人称代词，it 可以除人以外的一切事物或动物。如： I dropped my watch and it broke. 我把手表掉在地上摔坏了。 It’s hard work, but I enjoy it. 工作很辛苦，可是我乐意干。 “Where is the dog?”“It’s in the bedroom. ”“狗在哪?”“在卧室里”。 2.指人 it 指人主要用于指不性别不明的婴儿或用于确认某人的身份。如： Is it a boy or a girl? 是男孩还是女孩? There is a knock on the door. It must be the postman. 有人在敲门，一定是邮递员。 【说明】在答语中，常用来指本人，如说It’s me。

3.代替某些代词 代词it 还可用于代替指示代词this, that 以及复合不定代词something, anything, nothing等。如： “What’s this?”“It’s a new machine. ”“这是什么?”“是一种新机器”。 Nothing is wrong, is it? 没出什么问题，是吗? 二、it 作非人称代词的用法 1.基本用法 it 作非人称代词的用法，主要用于指时间、距离、价值、天气、气候及温度等自然现象。如： It’s too late to go there now. 现在去那儿已经太迟了。 It rained all day yesterday. 昨天下了一天的雨。 It can get very hot here. 这里有时会很热。 2.用于某些句型 It’s time for sth. 该做某事了。 It’s time to do sth. 该做某事的时候了。 It’s time for sb to do sth. 某人该干某事了。 It’s (about / high) time + that-从句. 某人该做某事了。(从句谓语用过去式，有时也用“should+动词原形”) It’s first (second) time + that-从句. 某人第几次干某事。(从句谓语用现在完成时)

选修6It的用法语法练习题及答案

It的用法 It的用法在高考中也是重现率较高的语言点，尤其是it用于强调句。其考查方式多通过“单项填空”进行，偶尔也出现在“短文改错”和“完形填空”中。 1．(NMET98) It was only when I reread his poems recently ___ I began to appreciate their beauty．A．until B．that C．then D．so 正确答案：B 此题考查强调句，所以用that。 2．(NMET98) I hate____when people talk with their mouths full． A．it B．that C．these D．them 正确答案：A 此题考查it作形式宾语的用法，所以选A。 3．(MET91，短文改错)David and I did not agree and David pointed to a path which he thought it would probably lead to a village． 正确答案：去掉it，因为定语从句中已有宾语which。 一、要点点拔 1．代替上文中提到过的人或事物。指代人时，一般用于小孩或身份不十分明朗的人。 1) －Who is the baby? －It‘s my teacher’s son． 2) －Who is that gentleman? －It's my friend Tom．He(不可用It) wants to see you． 2．用于表达天气、环境、时间、距离、季节等。例如： 1) It’s half an hour’s walk from here to our school． 2) It‘s nice and warm here． 3) But it's two o'clock now, and it's time for us to go to school． 3．用作形式主语.it 没有具体意义，而只是帮助把真正的主语移至句子后尾，使句子显得平稳一些，能借it 给移至句子后尾的主语有三种：一种由不定式表示，一种由动名词表示，一种由从句表示。 1).It 替代真正的主语——动词不定式短语. It is easier to say than to do . It is a good act to help the others. 2).it 替代真正的主语——动名词短语,以动名词短语做主语的句子，主要在以no good, no use, no harm, dangerous, foolish 等词作表语的句中. It’s no harm drinking running water in that area。 It’s foolish talking like that. 3).it 替代从句作主语，用从句做主语的带it 的句子很多,常见的有下面几类： ①It is a pity (a shame ,a fact ,a wonder ,a good thing,etc. )that… It is a shame that he didn’t pass the exam. ②It is strange ( surprising,obvious ,true, good,possible,clear,etc. ) that…。 It was clear that they had no desire for peace. ③It seems (happened ,turned out,etc.)that… It seemed that things were not as they expected. ④It is said ( decided ,expected ,etc)that … It is said that the tickets have been sold out . 4.用作形式宾语。

it用法及句型归纳

it用法及句型归纳 it为人称代词，主格与宾格同形。该词用法灵活，下面帮助同学们作以归纳。 一、可用来代替指示代词this或that。例如： —What's this/that? 这/那是什么？ —It's a ruler. 这/那是尺子。 二、表示时间、距离、天气、数字等。例如： 1. —What's the time?几点了？ —It's ten to ten. 九点五十。 2. —What's one plus two? 一加二等于几？ —It's three. 等于三。 三、用来代替前面提到的人或物。例如： This is my pen. Give it to me, please. 这是我的钢笔，请把它给我。 四、指心目中或上下文中所指的人或物。例如： 1. —Who's that over there? 那边的人是谁？ —Is it Bill? 是比尔吗？ 2. Miss Gao has a computer. It's new. 高老师有一台电脑，它是新的。 五、指身份不明、性别不详的人或者指照片中的人。例如： —What's the baby in the picture?照片中的那个婴儿是谁？ —It's me. 是我。 六、在电话用语中，可用it来指代对方或者自己。例如： —Hello! Who's it? 喂，你是哪位？ —It's Jim. 我是吉姆。

在初中英语教材中，出现了许多由it引导的固定句式，现归纳如下： 一、It's time for sb. to do sth. / It's time for sth.意为"是(某人)该干……的时间了"、"到……的时候了"。例如： 1. It's time for supper ／to have supper.该吃晚饭了。 2. It's time for me to study.我该学习了。 二、It takes(sb.)some time to do sth.意为"(某人)花……时间做某事"。例如： 1. It takes twenty minutes to go to school by bike. 骑自行车上学要花二十分钟的时间。 2. It took me a week to finish reading the book. 我花了一周时间读完这本书。 三、It is one's turn to do sth.意为"轮到某人做某事了"。例如： It's your turn to be on duty tomorrow. 明天轮到你值日了。 四、It is ／has been ＋时间段＋since ＋一般过去时，意为"自从……以来已过了……(时间)。" 例如： 1. It is / has been four days since I caught a cold. 我感冒已四天了。 2. It is / has been two weeks since we met last. 自从我们上次见面以来已过了两周。 五、It seems ／seemed ＋that从句，意为"看起来好像……"。例如： It seemed that our team was going to win. 我们队看起来好像要赢了。 六、It's＋表语＋to do sth.。例如： It's a good idea to go out for a walk. 出去散步是个好主意。 七、It's ＋adj.＋that从句。例如： It's true that I may fall behind the other students.我真可能落在别的学生后面。 八、It's＋adj.＋of(for)sb.＋to do sth.。对于这个句型究竟用of还是用for，主要取决于前面的形容词。如果形容词是描述不定式行为者的性格、品质等的，如kind，good，nice，clever 等用of；如果形容词仅仅是描述行为的则用for，这类形容词常见的有difficult，easy，hard，important，dangerous等。例如：

-it的用法及强调句型(精心整理)

it的用法及强调句型 it的用法 一、it作指示代词【完成句子】用one，ones，it，that，those填空 (1) — I can't find my watch. —You haven't found ______？If you want to buy a new ______，I suggest you buy ______ made in China. (2) We've got a big cup and two small ______. (3) The weight of an elephant is much greater than ______ of a tiger. (4) The books on the first shelf are easier than ______ on the second shelf. (5) The boy told his story and ______ of the girl upstairs. 【答案】(1) it; one; one (2) ones(3) that (4) those / the ones (5) that / the one 【结论1】 ①指代上文提过的事物时，it指的是同名同物，相当于the＋名词； ②one指的是同名异物，表示单数可数名词相当于a ＋名词；a / an＋形容词＋one等于a / an＋形容词＋名词；复数形式用ones； ③that后面常有后置定语，有特指意义，代替不可数名词或单数可数名词，相当于the＋ 名词； ④复数名词用those，相当于the ones。 【例句观察】— Someone is knocking at the door. Who is it? — It must be Leo. He said he'd come to see me. 【结论2】it指代人时，常指小孩或身份不明的人。 【例句观察】It's too quiet in the room. Everyone just keeps silent. 【结论2】it可用以指代环境或情况。 (6)— What time is it now? — It's half past seven. (7)— It is spring now and it's warm these days. 【结论3】it可用以指代时间、季节、天气或距离。 【注意】it指代时间时，有如下一些句型： (1) It is time for sth. (for sb.)to do sth. / that－从句(should do / did, 必须用虚拟语气) 例：① It's time for lunch. ② It's time for us to clean the house. ③ It's time that we should clean the house. ＝It's time that we cleaned the house. (2) It is / has been ＋some time ＋since－从句(从句用一般过去时) It is 10 years since I graduated from college. (3) It / This/That is the first / second time that－从句(必须使用现在完成时)这是某人 第……次做了某事。 It / This/That was the first / second time that－从句(必须使用过去完成时) 例：①It is the second time that she has visited the Great Wall. ②This was the first time that I had come late to school. (4) It was ＋时间点＋when －从句 例：It was evening when we got home. ＝It was evening in which we got home. (5) It was / will be ＋some time ＋before －从句 例：①过了5年他们才从北大毕业。 It was five years before they finally graduated from Beijing University. ②不久，我们就要从我们学校毕业了。 It won't be long before we graduate from our school. 二、it作形式主语 1.代替主语从句 ①It is clear ( obvious，true，possible certain....) that ..... “清楚（显然，真的，肯定．．．）” ②. It is important ( necessary，right，strange，natural...) that ... that 后的从句中要用虚拟语气（should + 动词原形），should 可以省去，建议记住该句型中的形容词。 It is important that we (should) learn English well.

英语中it的用法及练习

英语中it的用法及练习 一、概述 在英语中，it的使用相当广泛，它既可用作代词，如人称代词（personal it）、指示代词（demonstrative it）及非人称代词（impersonal it）, 也可用作引导词（anticipatory it）和强调结构中的强调词（emphatic it） Someone is ringing the doorbell. Go and see who it is.有人在按门铃。去看看是谁。（人称代词）What’s this?这是什么？ It’s a book.这是一本书。（指示代词） What a long way it is from Beijing to London! 从北京到伦敦真远。（非人称代词） It's best to plant trees in spring because it's warmer.春天是植树的最佳时节，因为天气更暖和。（作引导词） It was I who met him in the park last week. 是我上星期在公园遇到他的。（强调结构中的强调词） 二、it作代词 1、用作人称代词（personal it） 代替前文提到过的事物，it作真实主语或宾语。 The frog is not a warm-blooded animal. It is a cold-blooded one.青蛙不是温血动物，它是冷血动物。 My pen is missing. I can't find it anywhere. 我的笔丢了，我哪儿也找不到它了。 I won't be back tonight. Please tell my wife about it .我今晚不回来了，请你向我妻子说一声。 I was disappointed with the film. I had expected it to be much better. 我对这部电影很失望，我曾盼望它更好。 Tom's mother kept telling him that he should work harder, but it didn't help.汤姆的妈妈不停地告诉他要努力，但这没起作用。 2、用作指示代词（demonstrative it） 相当于this或that，it有时不特指某件东西，而代表前面已提到的或将会发生的某件事情。 -Who is knocking at the door? —谁在敲门？ -It's me. —是我。 I had a talk with the student. It was very helpful to her. 我和那个学生谈了次话，对她非常有帮助。 It happened during my stay in the United States. 事情发生在我在美国的时候。 -Whose exercise book is that? —谁的作业本？ -It's his . —是他的。 3、用作非人称代词（impersonal it） 代词it可用来指除人以外的一切生物和事物，无阴阳性之分。可指时间、距离、度量、价值、自然现象（天气、气体、阴暗等）。 -What's the time? —“几点了？” -It's half past ten. —“十点半”（指时间） It is late autumn now. 现在是深秋。（指时间） It is rather cold today, isn't it?今天很冷，是不是？（指天气） -How far is it from here to the station? —从这儿到车站有多远？ -It's about two kilometers. -大约两公里。（指距离） It is raining hard. 雨下得很大。（指自然现象） -What's the cost of the dictionary? 那本词典多少钱？

(完整版)it的用法练习题

it的用法练习题（一） 1.It took us over an hour _____________along the street. A. walk B. to walk C. walking D. walked 2.I think it a great honor ________to visit your country. A. to invite B. inviting C. having invited D. to be invited 3.Many people now make_____________ a rule to buy cards for their friends before Christmas. A. themselves B. it C. that D. this 4._____is very clear to everyone that he's round and tall like a tree. A. This B. What C. That D. It 5.In the United States, bus travel doesn't cost much as train travel,_____________? A. don't they B. does it C. do they D. doesn't it 6.Someone is at the door, who is_____________? A. this B. that C .it D. he 7.—It is raining cats and dogs. —_____________ . A. So it is B. So is it C. Neither it is D. Neither is it 8.—My home is in that tall building over there. —_______________? A. Can it see B. Can see it C. Can be seen it D. Can it be seen 9. _____________raining hard for 3 hours without stopping. A. It is B. It was C. It has been D. It had been 10.—Has the boy got his bicycle now? —Yes, the police gave_____________. A. him to him B. it to it C. it to him D. him to it 11.—Boy, —It is, looks like spring is coming soon.

It的用法、Therebe句型

期末专题练习——It的用法、There be句型 ［教学内容］ 第一部分It 的用法 概说：It是个非常简单的单词,但其用法却很灵活。 一、指代作用。It作句子的主语。 （一）It指前面已经提到过的人或事物。 1. What’s this? —It’s a chair. 2. Who is it? —It’s me. 提示：it代替上文提及的原物(复数用they)； one指代上文提及的、泛指的可数名词单数（复数ones）； that指代上文提及的定指的可数名词单数或不可数名词（复数those）。 （二）It指时间、季节。虚义。 1. What time is it? —It’s nine. 2. It’s time to go to school. Let’s go. 3. What day is today? —It’s Saturday. 4. What is the date today? —It is Oct. 1st. 5. What season is it? —It is summer. （三）It指气候。虚义。 1. It is cold in this room. 这个房间很冷。 2. What’s the weather like today? —It’s fine. 今天天气怎么样？天气很好。 3. It often snows in winter in Harbin. 哈尔滨的冬天经常下雪。 （四）It指距离、情况等。虚义。 1. It is five kilometers from my home to the school. 从我家到学校有五千米。 2. It is very near from this shop to that. 从这个商店到那个商店很近。 3. It is a long way to the sea. 这离海很远。 4. Is it well with you? 你身体好吗？ 二、It作形式主语。 动词不定式、动名词短语、从句在整个句中起主语作用，而这一部分用词较多，因此

It的用法及典型句型归纳. 个人总结

It的用法及典型句型归纳 一、人称代词it的最基本用法是作代词，主要指刚提到的事物，想法，以避免重复;也可以指性别不明或性别被认为是不重要的人或动物；未指明但谈话双方都明白的事情或情况。 ①They watched the train until it disappeared in the distance. ②Is this your dog？No, it isn’t. ③I hate it when people talk with a full mouth.． 二、.非人称代词.it有时并不指具体的东西而泛指天气、时间、日期、距离、价值、度量、温度、环境等： It is a lovely day, isn’t it? // It was nearly midnight when she came back. It is April First today. // It is some 3000 kilometers from A to B. It is three dollars. // Today it is 30 degrees centigrade. 三、作形式主语，替代主语从句，动词不定式，或动名词短语 1.作形式主语替代主语从句 ⑴It is clear ( obvious，true，possible，certain....) that ＂┅清楚的（显然的，真的，可能的,肯定的．．．）＂ ⑵It is important ( necessary，right，strange，natural...) that + (should ) do (虚拟语气) ┅是重要的(必要的,对的,奇怪的,自然的┅) ⑶It is said (reported/ learned/believed/thought/known/told/hoped.....) that = sb / sth is said (reported/ believed /thought…) to do( to be doing/ to have done) sth ＂据说（据报道，据悉．．．）＂。 ⑷It is suggested ( advised/ ordered / demanded/ insisted/ commanded... ) that +(should ) do ＂据建议；有命令．． ⑸It is a pity ( a shame /an honour/a good thing/a fact,/a surprise/... ) that that后的从句一般用虚拟语气（should + 动词原形），should可省去．表示出乎意料，常译为＂竟然＂。没有这种意义时，则不用虚拟语气。 小练一下： It is very clear that he’s round and tall like a tree. = It is important that we (learn) English well. It is necessary that he (remember) these words. It is said that he has come to Beijing. = It is reported that another earth satellite has been put into orbit. = It is suggested that the meeting ( put off). It was ordered that we (arrive) there in two hours. It is a pity that such a thing ( happen) in your class. It is a pity that he (be) ill. 2.作形式主语替代不定式 . ⑴It is kind ( of sb. ) to do sth.= sb be kind to do sth.一般都是表示人的特性的形容词。如： bad /brave /careless/ clever /cruel / foolish / good （好心的）/ honest/ kind / lazy / modest/ naughty/ nice（有教养的）/polite/ rude / silly / stupid / wise ，等。 Eg. It is kind of you to give me a hand. = ⑵It is necessary ( for sb. ) to do sth. .不定式的逻辑主语是由for引起。常见的形容词有： Important/ necessary/ natural/ easy / safe / common / normal / hard / difficult / dangerous/ unusual/ rare / impossible / pleasant Eg. It is important for her to come to the party.

it用法+练习题

It的用法总结 在英语中,it有许多不同的用法,它既可以用作代词(如人称代词、非人称代词)，也可以用作引导词（作形式主语或形式宾语），还可以用来构成强调句型。 1.it用作代词 (1) 用作人称代词在句子中作主语或宾语；指前面已经提到过的事物、动物或人，且it指特定的事物；如果指前文中提到的事物中的任何一个，用one。one可以与any, each, every, not等连用，但one不可代替不可数名词。 —Where’s your car? —It’s in the garage. 你的汽车在哪儿呢？在车库里。(指代物品your car) Did you hit it? 你打中了吗？(指代事件) The baby cried when it was hungry.这婴儿饿时就哭。（指代婴儿，尤指性别不详或无所谓时） —Who is that? —It’s me. 是谁？我。(指一定情景中所确定的人或事物，此时相当于指示代词，代指this 和that,有时也指人) —What’s this? —It’s a box. 这是什么？一只箱子。 (2) 作非人称代词表示天气、日期、时间、温度、距离、价值、路程、度量、自然现象与环境等。也可模糊地指一般情形或上文的部分或整个意思。译成汉语时，it通常不一定译出来。 It’s a long time since they left. 他们走后很久了。 It’s two miles to the beach.离海滨有两英里远。 That’s just it—I can’t work when you’re making so much noise.原因就在这里——你弄出这么大的声音，我工作不了。 另外，需要注意两点： （1）“It’s time…”后面可以接不定式和介词短语表示“是做……的时候了”。如： It’s time for supper. It’s time to have supper. (2) “It’s time…”后面还可以接一个从句，但是从句中的谓语动词一定要用过去式即虚拟语气，如： It’s time we had lunch.是我们吃饭的时候了。 It’s time we started.是我们该出发的时候了。 2.it用作引导词 (1) 作形式主语由动词不定式、动词-ing短语或名词性从句担任主语的句子，常用it 来作形式主语，而把真正的主语放在句子的后面。 It’s not easy for us to learn English well. [句型为: It +be+形容词+（for sb.）to do sth.] It’s foolish of you to say that to her. [句型为: It +be+形容词+（of sb.）+to do sth.] It’s no use/good/help…sleeping too much. (句型为: It +be+名词+doing) It’s important that we be there on time.（句型为: It +be +形容词+that从句） It’s high time that Tom went to school. (句型为: It +be +time +that从句，从句中的动词用过去时) It was the second time that he had telephoned me that day. [句型为: It +be+ the first(second, third)time +that从句]（that从句中动词用完成时） It was arranged that they should leave the following winter. (句型为: It +be+过去分词+that