本资料来自于资源最齐全的２１世纪教育网www.21cnjy.com
高中英语学案
制作：王忠 使用日期：2010.8.26 适用年级：高一（下）Unit 18 编号：5
It句型全归纳
★It 作主语的常见句型：
【句型1】It be adj. (for sb.) to do sth. It作形式主语替代动词不定式：
做某事对某人来说是怎么样的。
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. 对于年轻人来说无证驾驶是违法的。
It is hard for him to make up his mind. 他很难下定决心。
【句型2】It be adj. of sb. to do sth. It作形式主语替代动词不定式：做某事某人是怎么样的。
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. 你帮我解决这个问题你真好心。
=You are kind to help me with the problem.
It was foolish of her to say such a thing. 她说那样的话，真是太蠢了。
=You were foolish to say such a thing.
【说明】介词 of 与 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”。
【句型3】It's no good/use doing… It作形式主语指代动名词：做某事没好处（用）。
此句型中的形容词和名词常见的有：no／little use, no／much good, useless等
例 It's no use crying over spilt milk. 后悔无益；既往不咎；覆水难收。
It is useless trying to persuade him to give up smoking.
【句型4】It's (well)worth doing…It作形式主语替代动名词：做某事是值得的。
=It's (well)worth one's while doing/to do…
=It's (well)worth while doing/ to do
It’s worth our while waiting another hour for our guests. 我们再等我们的客人一小时，此事是值得的。
【句型5】①It is + noun +从句
②【特殊句型】It's a pity/shame that…(should)…竟然…【从句可用(should)+动词原形的虚拟语气】
惯用句型有：
It is common knowledge that… ……是常识
It is a surprise that… 令人惊奇的是……
It is a fact that… 事实是……
It is no wonder that … 难怪 … …
例It is a pity that she has made such a mistake. 真遗憾，她犯了这样一个错误。
It's a pity that you should have to leave. 你非走不可真是件憾事。
It is a thousand pity/ thousand pities that he missed the chance. 他错过了这次机会真是太可惜了。
It is no wonder that he has passed the examination. 难怪他考试及格了。
It is a shame that you have to leave so soon. 你必须这么早离开，真遗憾。
It was a stupid thing that he didn’t listen to his teacher. 他不听老师的话，真蠢。
It is a great honor that he receive that prize.他得到了那个奖真是无上的荣耀。
It is a fact that English is being accepted as an international language. 英语正被公认为一门国际语言，这已是事实。
In fact it is a hard job for the police to keep order in an important football match. 实际上，对于警察来说要在一场重要的足球比赛中维持秩序是一个难事。
It is no secret that the president wants to have a second term at office.
总统想要连任，此事并不是什么秘密。
It is our duty that we serve the people heart and soul. 全心全意为人民服务是我们的职责。
【句型6】①It is + adj. + 从句
②【特殊句型】It's surprising that… (should)…竟然…【从句可用(should)+动词原形的虚拟语气】
（adj.= surprising, strange, important, unimportant, necessary, unnecessary, natural, essential）
惯用句型有：
It is necessary that… 有必要……
It is important that… 重要的是……
It is obvious that… 很明显……
例It is important that we (should) learn English well. 我们学好英语是非常重要的。
It is necessary that the students (should) remember all the new words. 学生记住所有的新单词是必要的。
It is certain that Tom will do well in the exam. TOM肯定在考试中会做好。
It is very clear that he’s round and tall like a tree.
= That he’s round and tall like a tree is very clear.
It is quite important that China becomes an official member of WTO．中国成为世贸组织的正式成员是十分重要的。
It is necessary that you ask your parents for help when you are in trouble. 当你遇到困难时向你父母请教是必要的。
It was surprising/strange that he should have left without saying goodbye.真奇怪，他竟然没说再见就离开了。
【句型7】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.)
他开那么快让我很担心。
【句型8】It vi(to sb.) that…= sb./sth verb to do
(verb = appear, seem, come about, emerge, follow, chance, happen, occur, matter, turn out , work out)
例 It (so) happened/chanced that they were out.
(= They happened/chanced to be out.)
碰巧他们出去了。
It seems that there will be a heavy snow tomorrow．
【句型9】it look (seem, appear, happen, occur) as if…似乎／看起来/碰巧……
如果与事实不相符合，则用虚拟语气。
惯用句型有：
It appears that… 似乎……
It (so) happens (that)… （那么）碰巧……
It occurred to me that… 我突然想起……
It seems that he is sick. (= He seems to be sick.) 看来他似乎有病。
It happened that he wasn’t there. (= He happened not to be there.) 碰巧他不在哪儿。
He would have been traveling on the train that crashed if it hadn’t so happened he’d been working late that night. 要不是那天晚上他正巧下班晚了，他就会乘坐那趟出事的列车了。
It looks that he has been there before．看起来他好像以前到过那儿。
It seems to me that the maths problem is too easy for her．在我看来，这道数学题对她来说太简单。
It happened that I met my old friend in the street yesterday.
= I happened to meet my old friend in the street yesterday.昨天我碰巧在街上遇到我的老朋友。
It looks as if he is ill.（真的病了）
It looks as if he were ill. （没有生病）
It seemed as if he were dying.
It seemed as though he didn’t recognize me. 他似乎没认出我来。
【句型10】It is v-ed that…=sb/sth is to do
(verb=say, report, think, believe, hope, expect, accept, decide, understand, know）
常见的过去分词有：known, agreed, said, reported, learned, announced, known, decided, expected, believed, considered, declared, felt, hoped, seen, supposed, thought, understood, determine, intend, plan等。
惯用句型有：
It is known to all that… 众所周知
It is said that… 据说
It is reported that… 据报道
It is believed that… 大家相信
It is hoped that… 大家希望
It is well known that… 众所周知
It is thought that… 大家认为
It is suggested that… 据建议
It has been decided that… 大家决定
It must be remembered that…务必记住的是
例It is reported that another man-made satellite has been put into orbit. 据报道，又有一颗人造卫星被送入轨道。
It is said that he has gone to the USA for further study. 据说他已去美国深造了。
It is known to all that light travels in straight lines. 众所周知，光以直线运行。
It has been decided that we should design the machine ourselves. 已经决定我们自己来设计这部机器。
It is said that the couple have gotten divorced.
(=The couple are said to have gotten divorced.) 据说这对夫妇已离婚了。
It is reported that a lot of people lost their jobs in the city last month.据报道，上个月这个城市的许多人都失业了。
It is known that Taiwan is part of China．众所周知，台湾是中国的一部分。
It is generally believed that teaching is as much an art as it is a science．
It is well known that Thomas Edison invented the electric lamp．
【句型11】It is v-ed that … (should)… 【从句用（should）+动词原形的虚拟语气】
(verb=demand, request, require, order, suggest, advise, recommend
例 It is suggested that he (should) begin with the third question.
=It is our suggestion that he (should) begin with the third question.
大家都建议他应该从第三个问题开始。
【句型12】It is up to sb to do sth. 该由某人做某事
It’s up to you to to make the choice. 得由你来作选择。
It is up to you to look after the children．应该由你负责照看这些孩子。
Who is it up to to take charge of the first company that is run by the state？
【句型13】If it were not for… / If it hadn’t been for… 若不是因为……
If it were not for their help, we couldn’t have got over the difficulties. 要不是他们帮助，这些困难我们不克服不了的。
【句型14】It takes years to master a new language. 要花多年的时间才能掌握一门新的语言。
【说明】此句型可以有以下多变种变体：It took me an hour to write the letter. =The letter took me an hour (to write). =I took an hour to write the letter. 我写这封信花了一个小时。
【句型15】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.
【句型16】①It’s time for sth. 该做某事了。
②It’s time to do sth. 该做某事的时候了。
③It’s time for sb to do sth. 某人该干某事了。
④
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.
It is time that children should go to bed.
= It is time that children went to bed.
【句型17】①It's the/ one’s x-th time (that) … 【have v-ed】…第几次做某事了
②It was the/ one’s x-th time (that)… 【had v-ed】…第几次做某事了
例It is the first time I have been here.
= This is the first time I have been here.
It's the third time that he has failed the driving test.
It was the third time that he had failed the driving test.
【句型18】①It is/has been… since …discontinuous v-ed(非延续性动词) 某动作从开始发生到现在已有多长时间了。
②It 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 since he came here. 他来这里已经十年了。
It's 10 years since he lived here. 他离开这里已经十年了。
It is eight years since they last met each other．他们自从上次相见已有八年的时间了。
It is just a week since we arrived in Beijing．我们到达北京刚好一星期。
It is five years since I last smoked．我戒烟已有五年的时间了。
It is two months since he was ill．他病愈已两个月了。
【句型19】It was(not)…时间段… before…一般过去时…过(不)了多长时间某动作发生了
It will (not)…时间段…before…一般现在时…过(不)多长时间某动作发生了
例 It was not long before they arrived. 没等多久他就来了。
It was long before they arrived.等了很久他才来。
It won’t be long before he arrives. 等不了多久他就会来了。
It will be three days before he returns.要等三天他才得回来。
【句型20】It was …时间点…when…（当某人做某事时）时间是…
例 It was ten o’clock when we reach home.当我们到家时时间是10点。【It指时间】
【比较】It was at ten o’clock that we reached home. 我们是10点到的家。【It was… that…为强调句】
【句型21】It was…地点…where…地点是…
例 It was his office where he held the meeting.地点是他举行会议的办公室。【It指地点】
【比较】It was at his office that he held the meeting.他是在他的办公室举行的会议。【It was… that…为强调句】
【区别】
①It is 20 years ago______ the two friends met in Viet Nam.
②It will be 20 years______ they meet in Viet Nam.
③It is 20 years______ he came to live here.
④It is 20 years______ he spent in writing this novel.
⑤It was not long______ the people in Austria took up guns.
先分析结构，再分析意思。谨慎试词，防止混淆。①句强调时间状语，故用that；②是It…before…句型，时间状语从句，只用before；③句It is a period of time since-clause是固定结构，只用since；④是强调句型，因spend一词为及物动词，故需要宾语that。但此例是一临界例句。它可能是强调句型，亦有可能是定语从句，若为定语从句则which亦可。⑤是It…before…句型，时间状语从句，只用before.
【区别】
① It is on a winter night _______ his wife left him without saying goodbye.
A. which B. that C. when D. in which
② It is a winter night _______ his wife left him without saying goodbye.
A. which B. that C. when D. in which
③ It is a winter night _______ he spent with me last year.
A. that B. where C. as D. when
无论强调时间状语还是地点状语，都必须有介词短语部分。去掉“金三点”后，结构合理，句意通畅，则为强调句型，①即是。若不成结构，即看似被强调的部分不能在句中充当任何成分，则有可能是定语从句，还应注意关系副词的选用，②即是。而③例是临界的例子,前面已讨论过, 就不再赘述了。
【句型22】It＋动词＋that ／whether ／what ／ who ／when ／where ／why从句。
【特例】It doesn’t matter whether/ if /where/when/what...该句型中whether(if) 引导的从句是真正主语，该句型常译为 ＂不论（是否）．．．没关系．．．。如：
It was not clear what he meant．他是什么意思不太清楚。
It hasn't been decided whether the project would be given up．是否要放弃这项工程还没决定。
It was not known who would speak at the meeting．谁在大会上发言不清楚。
Does it matter if he can't finish the job on time？
Will it matter if I'm a little late
If I have to stay late at work tonight, it won't matter because we can go
out another night.
It doesn't matter what you wear, as long as you look neat and tidy.
Does it matter what I think
What does it matter how old I am
It does not matter that the gun was in fact unloaded.
Do you think it matters that the cups and saucers don't match
【句型23】It is no wonder ＋that-clause／No wonder ＋that-clause 难怪某人……。例如：
They are all classmates．It is no wonder that they should help each other with their studies．
It turned out that he slept very late last night. No wonder he fell asleep in class.
【句型24】It ／This ／That is ／was ／the best （worst／most．．．）＋that-clause 这是／那是某人经历过的……中最……的 了。
若主句的谓语动词用is，从句的谓语动词要用现在完成时；若主句的谓语动词用 was，从句的谓语动词须用过去完成时。例如：
It was the best novel that I had read before．这是以前我读过的小说中最好的一部了。
This is the most tiring talk that I have had for years. 这是这些年来我听过的最令人乏味的演讲了。
【句型25】It is/was because … … + that … … 是因为… … 才… …
It was because he was ill that he had to see a doctor. 是因为病了，他才不得不去看医生的。
He told me that it was because he was ill that they decided to return. 他告诉我正是因为他患病了他们才决定回来的。
It was because the weather was too bad that we failed to get in touch with them. 正是因为天气太坏，我们才没有和他们联系上。
【句型26】It is/was not because…but because … + that …不是因为… 而是因为 …才…
It is not because she is beautiful but because she has a talent for music that I recommend her.
我不是因为她美，而是因为她有音乐天才，才推荐她的。
It is not because of your efficiency but because of long absence that you get little money.
不是因为你做事效率低，而是因为你缺勤时间久，得到的钱才少的。
【句型27】强调句句型It is/was…that/who…
【1】强调句句型
1.陈述句：It is/ was + 被强调部分（通常是主语、宾语或状语）+ that/ who（当强调主语且主语指人）+ 其它部分。
It was yesterday that www.he met Li Ping.
2.一般疑问句：同上，只是把is/ was提到it前面。
Was it yesterday that he met Li Ping
3.特殊疑问句：特殊疑问词即被强调部分+ is/ was + it + that/ who + 其它部分？
When and where was it that you were born
What was it that made you so happy 使你这么高兴的到底是什么？
Whom was it that Mr. Smith saw in the college yesterday 史密斯先生昨天在大学里见到的那个人到底是谁？
4.用于宾语从句：动词+ 连词即被强调部分+ it is/was +that/ who +其他部分。
I don’t know when it was that he came home.
She didn’t know where it was that he was.
5.与情态动词搭配：即将句型中is/was变为be用于情态动词之后。
I think it could be Tom who is to blame.
Could it be in the office that he was scolded by his boss
It will not be you who(that) will have to take the blame for this.不是你必须承担这份责任。
It must be the servant who killed Mr. Smith. 一定是仆人杀害的史密斯先生。
It may have been at Christmas that John gave Mary a handbag. 或许是在圣诞节，约翰送手提包给玛丽的。
6.强调句例句：针对I met Li Ming at the railway station yesterday.句子进行强调。
强调主语：It was I that (who) met Li Ming at the railway station yesterday.
强高考资源网调宾语：It was Li Ming that I met at the railway station yesterday.
强调地点状语：It was at the railway station that I met Li Ming yesterday.
强调时间状语：It was yesterday that I met Li Ming at the railway station.
7.注意：构成强调句的it本身没有词义；强调句中的连接词一般只用that, who，即使在强调时间状语和地点状语时也如此，that, who不可省略；强调句中的时态只用两种，一般现在时和一般过去时。原句谓语动词是一般过去时、过去完成时和过去进行时，用It was … ，其余的时态用It is … 。
【2】not … until … 句型的强调：
句型为：It is/ was not until + 从句 + that + 其它部分
It was not until she took off her dark glasses that I realized she was a famous film star.
直到她摘下墨镜来我才意识到她是一位著名影星。
It was not until I had read your letter that I understood the true state of affairs.
直到我读了你的信，我才了解到事情的真实情况。
It is not until I have seen it with my own eyes that I will believe it.
只有我亲眼看到这件事，我才相信它。
普通句：He didn’t go to bed until/ till his wife came back.
强调句：It was not until his wife came back that he went to bed.
【比较】
倒装句：Not until his wife came back did he go to bed.
【3】only+ 状语从句 句型的强调句
句型为：It is/ was only+ 从句 +that+ 主句。
正常句：I left only after my mother cam back.
强调句：It was only after my mother came back that I left.
【比较】
倒装句：Only after my mother came back did I leave.
【4】It is/was + (被强调部分) + (that) …+ that…正是 …的这个 …才…
It is the fact that we have spent all our money that we must face.
正是我们已花光我们所有钱财的这一事实，才是我们必须面对的。
It was that he was chosen that made us very happy.
正是他被选中这件事，才使我们非常高兴的。
It is in the factory (that) we visited last week that his father works.
他父亲工作的地方，正是上周我们参观的那家工厂。
It is in the way (that) I like that she cooks chicken.
她正是以我喜欢的方式烹调鸡肉的。
【5】It is/was … not … (被强调部分)+ that…是… …而不是… …
It is/was not …but …(被强调部分)+that…不是……而是……
It was last week not yesterday that she met your brother in New York.
她是在上周而不是在昨天，在纽约看见你弟弟的。
It was not last week but yesterday that she met your brother in New York.
她不是在上周而是在昨天，在纽约看见你弟弟的。
It was Mary’s bag not Jone’s that was lost at school yesterday evening.
昨晚是玛丽的提包，不是琼斯的提包，在学校丢了。
It was not Mary’s bag but Jone’s that was lost at school yesterday evening.
昨晚不是玛丽的提包，而是琼斯的提包，在学校丢了。
【注】谓语动词的强调
如果需要强调谓语时，必用助动词do/ does或did。注意：此种强调只用do/ does和did ，没有别的时态；过去时用did ，后面的谓语动词用原形。
Do sit down. 务必请坐。
He did write to you last week. 上周他确实给你写了信。
Do be careful when you cross the street. 过马路时，务必（千万）要小心啊！
★It 作宾语的常见句型：
【句型1】verb+ it+ adj./noun (for/of) to do/clause (verb=think, believe, suppose, consider, feel, make, find, keep…)例如:
Do you think it possible for them to send an engineer there
I think it a pity that you didn't try harder.
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.
I found it kind of you to help me with that.
【句型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.例如:
You must find it exciting working here.
I have made it a rule to have a walk after supper every day.
【句型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) attend the conference.
You may think it strange that anyone would live there.
I think it best that you should stay here.我认为你最好呆在这里。
【句型4】verb + it+ as+ noun/ adj.+ clause 看做；认为；
(verb=accept, regard, take, see, view)
例 The teacher takes it as encouraging when so many students attend his lecture. 很多学生来听他的课时，这个老师认为这是一种鼓励。
【句型5】动词 + it + when /that/ if-从句。It用在不能直接跟宾语从句的动词后面，尤其是表示好恶、感激的动词后，enjoy, like, love, dislike, resent, hate, don't mind, appreciate宾语从句紧跟it之后。
如：
I dislike it when you whistle. 我不爱听你吹口哨。
We really appreciate it when she offered to help. 她来帮忙了，我们十分感激。
I’d prefer it if I didn’t have to do so much work. 要是我不必做那么多工作，好就太好了。
I like it that you came. 你来了，我很高兴。
I take it (that) he will come on time. 我认为他会准时来的。
You can put it that it was arranged before. 你可以说这是以前安排的。
Rumor has it that the defense minister will soon resign. 据传闻，国防部长不久就要辞职。
【句型6】动词 + prep + it + that-从句。depend on, rely on, see to, feel like, look to, insist on, stick to, answer for，be fond of等。凡介词后不能直接用that宾从，先用it再接that从句（except that例外）。如：
See to it that you’re not late again. 注意千万不要再迟到。
Look to it that this doesn’t happen again. 注意不要再发生这种事。
You may rely on it that he’ll come to meet you. 你放心，他会来接你的。
I can’t answer for it that he will come. 我不能保证他会来。
I'm for it that you will follow their advice. 我赞成你听他们的建议。
I know nothing about him except that he comes from America.
我对他一无所知，除了他来自美国这事外。
【句型7】动词 + it + 介词短语+ that-从句。
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；认为…理所当然
keep it in mind that…记住…
bring it to sb’s attention让某人注意…
如：
I owe it to you that I am still alive. 多亏有你我才仍然活着。
I took it for granted that he would help us. 我认为他会帮助我们的。
I take it for granted that you will be coming to the meeting. 我当然认为你会来参加会议。
Don't bother to arrange anything. Just leave it to me to sort out.你不必去安排任何事情。就留给我去处理。
★It 常用的其他固定句型
【句型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.
【句型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. 我们曾计划今天完成任务，但事实上，我们可能要下周才能完。
(2)相当于方式状语从句，表示“照原样”
例 Leave the table as it is. 让那桌子保持原样。
【句型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.
【句型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.
【句型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 the choice “A”
—That's it.
【句型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.
【句型7】 have it
(1)相当于say, insist表示“说，主张，表明，硬说”
例 Rumor 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.
【句型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.
【句型9】 so it seems / appears.
【句型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.
【句型11】 Go it! (Go on!) 拼命干, 莽撞
【句型12】 Now you have done it! (You have done sth. wrong.)
【句型13】 Now you'll catch it! (You'll be punished.)
【句型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.
【句型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.
=It turned out that his statement was false.
【句型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.
【句型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.
【句型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.
【句型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.
【句型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.
【句型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.
【句型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.
【句型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.
【句型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.
【句型25】It can't be helped. 没办法。
【句型26】 It is + one’s turn + to do sth. 轮到某人做某事
It was my turn to clean the blackboard.轮到我擦黑板了。
It is his turn to take the children to school.今天该轮到他送孩子们上学了。
【句型27】It makes no/little difference/matter to do something.
It makes no difference to me whether it’s foggy or clear. 对我来说，天气有雾或晴朗没什么关系。
It doesn’t make any difference to me whether he goes or not. 不管他是否去对我都没有什么影响。
It makes no matter whether you arrive first or last --- there’s enough food for everyone, whatever time they arrive. 大家早到晚到都无关紧要 --- 不管什么时候来，都有足够的东西吃。
【句型28】It doesn’t matter (to sb.) + 从句 （对）… …都无所谓
It doesn’t matter to me what he says. 对我来说，他说什么都无所谓。
It doesn’t seem to matter much whether he received the gift or not. 他是否接受这件礼物似乎都无所谓。
It doesn’t matter if we are late. 我们就是晚到一点也不要紧。
若有不妥之处，敬请批评指正。
21世纪教育网 -- 中国最大型、最专业的中小学教育资源门户网站。 版权所有@21世纪教育网本资料来自于资源最齐全的２１世纪教育网www.21cnjy.com
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；指代前文提到的事物。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
4. 泛泛的指某件事： (有时泛指一般情况)
It doesn’t matter.
It is a shame, isn’t it
How is it going (情况怎样)
It says in the newspaper that......
5. it用在一些词组中，it 没有特别的意思，模糊意义。
The last train's e on, we'll foot it.(来，咱们步行吧。)
二、it 作非人称代词的用法
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：
⑴指天气：It is a lovely day, isn’t it
⑵指时间: It was nearly midnight when she came back.
⑶指日期:It is April First today.
⑷指距离:It is some 3000 kilometers from Beijing to Guangzhou.
⑸指价值:It is three dollars.
⑹指温度:Today it is 30 degrees centigrade.
三、it用作形式主语
当不定式、动名词、从句等复杂成分用作句子主语时，为保持句子平衡，通常把真正的主语放在句末，而在句首使用形式主语it。
It’s very important to remember this. 记住这一点很重要。
It’s hard work climbing mountains. 爬山是费劲的事。
It’s unknown when he will come. 他什么时候来还不知道。
四、it用作形式宾语
当不定式、动名词、从句等复杂成分用作宾语且其后跟有宾语补足语时，通常会在宾语补足语前使用形式宾语，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)”。如：
I find it difficult to do the job well. 我发现做好这件事不容易。
I think it best that you should stay here. 我认为你最好住这儿。
We think it no use complaining. 我们认为抱怨是没有用的。
21世纪教育网 -- 中国最大型、最专业的中小学教育资源门户网站。 版权所有@21世纪教育网
