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．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 so
n． 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： ① It 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. ② It is strange ( surprising,obvious ,true, good,possible,clear,etc. ) that… 。 It was clear that they had no desire for peace. ③ It seems (happened ,turned out,etc.)that… It seemed that things were not as they expected. ④ It is said ( decided ,expected ,etc)that … It is said that the tickets have been sold out . 4.用作形式宾语。 当复合宾语中的宾语是不定式,－ing 短语或从句往往用 it 作形式宾语,而将真正的宾语移至句末,句子重心 后移。 1) We find it difficult to learn English well in such a short time． 2) We think it no use crying over spilt milk． 3) We made it clear when and where we were going to have the meeting． 5．用于强调句型，即“It is/was＋被强调部分＋that/who/whom+其它”句型之中。 使用该句型有以下几点请注意： ① 强调句的谓语 is 或 was 永远用单数. It was yesterday that I met your father in the street． ②不管被强调部分是哪种状语，只能用 that 连接，不得使用 where、when 等连词. It was in the street that I met your father yesterday． ③被强调部分为人时，可用 who(主格或宾格)和 whom(宾格)代替 that，用 that 也行。 1) It was your father that/whom /who I met in the street yesterday．
2) It was I that/who met your father in the street yesterday． ④强调句中 也要注意主谓一致、人称一致和否定转移的问题。 1) It is they who are our friends． 2) It was not until ten o'clock that we got home last night． ⑤注意不要混淆强调句和其他从句。It is was…that…为强调句标志，去掉后仍可组成一个完整的句子，只是 没被强调,而其他从句一般不具备这一特征。 比较： 1) It was ten o'clock when we got home last night．我们昨晚到家时已十点了。 2) It was at ten o'clock that we got home last night．我们昨晚是在十点到家的。 第一句不是强调句，when 不可改为 that,因为去掉 it was 和 that 后，只能组成“We got home ten o'clock last night．”这样一个不完整的句子；第二句是强调句，that 不可改为 when．
I. 形式主语型 1. It is clear (obvious，true，possible，certain…) that… 2. It is important (necessary，right，strange，natural…)that… 掌握本句型， 应该记住所列举的形容词， 并且记住 that 后的从句应用虚拟语气 (should+动词原形)， should 可以省去。 3. It is no good (use) doing sth． 4. It is a pity (a shame …) that… 本句型中，that 后的从句一般用虚拟语气 (should 十动词原形)，should 可以省去。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。 5. It is time (about time，high time) that… 本句型中 that 后的从句应该用虚拟语气。 6. It is the first (second…)time that… 7. It is said (reported，learned…．)that… 8. It is suggested (ordered…) that… 本句型中的过去分词应该是表示请求、建议、命令等的词，that 后的从句要用虚拟语气(should 十动词 原形)，should 可以省略。常译为“据建议；有命令……”。 9. It happens (seems，appears) that… 10. It takes sb…to do sth． 11. It doesn?t matter whether… 12. It is kind (of sb) to do sth． 本句型中的不定式如果需要逻辑主语，则须要前置介词 of，而句型中的形容词必须是能表示逻辑主语特 征的形容词，常见的有 bad，brave，careless，clever，cruel，foolish，honest，horrible，kind，lazy，modest， naughty, polite，rude，silly, stupid，wise，wrong 等。 13. It is necessary ( for sb) to do sth． 14. It is (just) like sb to do sth． 本句型为“某人(恰恰)是……样子”。用来表示赞扬或不满，若用否定式，则表示怀疑。 例：It's like him to leave the work to others． 他就是这样的一个人，把工作推给别人。 15. It is up to sb to do sth． 本句型表示“谊由某人做……”。 II．强调句型 It is+ 被强调部分+that/who… 本句型中被强调部分可以是主语、宾语或状语。强调的主语如果是人，that 可以由 who 换用。
III．其他句型 1. It is…since… 本句型主句中用时间作表语，一般用现在时或完成时，since 引导的从句常用瞬间动词的一般过去时态。 主句如用一般过去时，则从句用过去完成时。 2. It is…when… 本句型中的 when 引导的是一个时间状语从句，主句中的 it 指时间，表语由具体的时间充当。 3. It looks (seems) as if．． ． 本句型中的 as if 引导一个状语从句，常译为“看起来好像……”。如果与事实不相符合，则用虚拟语气． 例 1 It looks as if he is ill (真的病了) . 例 2 It looks as if he were ill (没有生病) . 一．替代词 it, that, (the) one(s), those 的用法辨析 1. The award on the left is more beautiful than _______ on the right. A the one B one C it D this 2. Few pleasures can equal ________of a cool drink on a hot day. A. some B. any C. that D. those 3. The hunter?s younger sister is taller than the elder ___. A the one B one C that D this 4. I need the plastic bags, not the paper______ . A the one B ones C that D this 5. The TV sets made in China are much better than ________ in Japan. A．that B．those C．them D．It 6. Listen to________! We will have three days off. A the one B ones C that D this 7. “A penny saved is a penny earned.” Who said_________? A the one B ones C that D this 8. I bought a dictionary three years ago and I am still using______ now. A one B ones C it D this 9. I bought a dictionary three years ago but I am going to buy a new _______soon. A one B ones C it D this 10. I was disappointed with the film. I had expected____ to be much better. A.that B. this C. one D .it 11 Equipped with modern facilities, today's libraries differ greatly from______. A. those of the past B. the past C. which of the past D. these past 12. My most famous relative of all, ______ who really left his mark on America,wasReb Sussel, my great-grandfather. A. one B. the one C. he D. someone 13. He has one blue pen and two red ________. A. one B. those C. one's D. ones 14. Cars do cause us some health problems —in fact far more serious than_____ mobile phones do. A. one B. ones C. it D. those 15. Cook was a strict but good captain, ______ who took good care of the sailors on his ship. A. that B. one C. it D. what 16. Mr Zhang gave the text books to all the pupils except____who had already taken them. A.these B.ones C.the ones D.the others 17. —— I'm looking for a flat. —— Would you like ____ with ____ garden?
A．it; the B．it; a C．one; a D．one; the 18.Meeting my uncle after all these years was an unforgettable moment, ___I will always treasure. A.that B.one C.it D.what 19. The style of the building is similar to _________of a temple. A.that B.one C.it D.what 20. The computers in our school are connected to the Internet while___in their school aren?t. A.that B.one C.it D.those 21.Our food and service are better than ________ used to be. A．it B．that C．they D．those 22.I?m moving to the countryside because the air there is much fresher than _____ in the city. A. ones B. one C. that D. those 23.We?ve been looking at houses but haven?t found _____we like yet. A. one B. ones C. it D. them 24.I prefer a flat in Inveneas to _____in Perth, because I want to live near my Mom?s A. one B. that C. it D. this 25.We needed a new cupboard for the kitchen. So Peter made _____ from some wood we had. A. it B. one C. himself D. another 二．It 常用句式 1 It was last night ___ I saw the film. A. the time B. when C. that D. which 2.Was it on October 1,1949 ___the PRC was founded? A. when B that C which D who 3 It was not until midnight____he came to . A. that B before C when Dsince 4.It was two in the morning __my son got up . A. when B that C which D who 5____was 1996 ___I graduated from the university. A. That, that B It ;that C That ;when D It; when 6.It is more than twenty years____China began to carry out the open-door policy. A. that B before C since D which 7 It won?t be long ___your mother comes back from work. A since B after C.before D that 8 It was only with the help of the local guide __. A. was the mountain climber rescued B. that the mountain climber was rescued C. when the mountain climber was rescued D. then the mountain climber was rescued 9 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 10 It was in this room___I once lived___we had a meeting. A where, that B which ,that C where ,where D that .where 11.It was in Indonesia, the UN officials believe,___the tsunani caused the greatest damage. A. where B. which C. when D.that 12.It was in the factory __produced TV sets ___ our friend was murdered. A. which, which B. that, which C. that, that D. where, that 13.It was last year __you taught me how to drive . A.when B.that C.where D.which 14.It was for this reason__her uncle moved out of New York and settled down in a small village.
A.which B.why C.that D.how 15.I can?t quite remember__he began teaching in our school. that, it was when B.when it was that C.when was it that D.that was it when 16.It is __who __wrong. we, am B. me, is C. I , am D.I , is 17.It is __he often fails in exams __ makes his parents worried about him. that, what B.because, that C. what, what D. that, that 18. It is you , rather than he ,that ___for the accident. A.is to blame B.are to blame C.is to be blamed D. are to be blamed 19.---Where did you meet him? ---It was in the park ____ his wife and he first met. A. that B. where C. on which D. when 20.---He was nearly drown once. ---When was _____ ---______ was in 1998 when he was in middle school. A. that; It B. this; This C. this; It D. that; This 21._____ in the regulations that you should not tell other people the password of your e-mail account. A. What is required B. What requires C. It is required D. It requires 22.—— Were all three people in the car injured in the accident —— No, ___ only the two passengers ___ got hurt． A．they were; that B．there was;who C．it was; who D．there are; who 23.It was ________ that I visited the Great Wall .A. many years B. years ago C. for many times D.years before 24.It is________ since I visited the Great Wall .A. many years B. years ago C. for many times D.years before 25. I hate ______ when people ask me for money. A．it B．that C．these D．them 26. ---Do you still remember ___ you lost your wallet? ---Yeah. It was at the crossing ___ I got lost. A．where was it/ that B. where it was that/that C. The place where/that D. where it was that/where 27.I don?t like working late into the night， but I can’t help _____. A. so B. that C. it D. them 28.We'll really catch ______ from our teacher if we're late for class again. A. it B. that C. so D. them Answers:
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