高考英语中，与it 有关的句型特别多，经常容易搞混淆。 先收藏再慢慢学习。 1) It was +一段时间+ before +主语+did: “过了…（时间）才” 2）It will be +一段时间+ before +主语+do : “要过…(时间)才” （主将从现） 3）It is (或has been) +一段时间+ since +主语+did: “自从…已有…(时间)了” 对比：It was +一段时间+ since +主语+ had done 4) It was + 时间点 + when + 从句： 5) It is / was + 被强调部分 + that （who指人）+ 其余部分：强调句型 6）It is / was + 表语 + that + 主语从句 7) It / This/ That is the first / second / last time ( that) + 主语 + have done (现完) 对比：(1) It / This was the first / second time ( that) + 主语 + had done (过完) (2) It /This is the adj.最高级 ( + 名词) + （that）+ 主语 + have done 1. it 固定句型 (1) as sb puts it 像某人所说的那样 (2) feel like it 愿意…… (3) when it comes to 说起…… (4) take it for granted that...想当然，理所当然地认为 (5) It occurred to sb. that... = It struck sb. that... = It dawned on sb. that... 某人突然 想起 (6) It goes without saying that... 理应如此/不言而喻. (7) It's not /just like sb. to do sth.……的行为不/正像某人的一贯作风. (8) (Just) as sb puts it：按照某人的说法 (9) It pays to do sth.：做某事是有价值 的（有用的） (10) It is no use doing sth. 做某事是没有用的 2. It is (表褒贬义)adj. + of sb. to do sth. 对比：It is (表中性)adj. + for sb. to do sth. 3. How did it come about that +从句？= How come…? 怎么会...? 4. It is（high）time＋（that）＋主语＋V-ed ( 或should + V) 5. It is + V-ed + that +主语 + do (have done) = 主语 + be + V-ed + to do 对比：1) It is + V-ed + that +主语 + did = 主语 + be + V-ed + to have done 常见动词：say, believe, think, expect, hope, decide, arrange, suggest, require, order, know 2) 主语+ seem / appear ( to be ) +表语 = It seems / appears that + 主语 + be + 表语典例： (1) It was some time before I realized the truth. 过了很长一段时间我才了解到真相。 (2) It will be many years before the situation improves. 这种状况要过很多年才能得到改善。 (3) It is the first time that I have visited the city. 对比：a. It was the third time that the boy had been late. b.This is the best film that I've (ever) seen. 这是我看过的最好的电影。 (4) You needn’t go if you don’t feel like it. 你不愿意去，就别去了。 (5) As someone puts it, practice makes perfet. 像某人所说的那样，熟能生巧。 (6) When it comes to English, he's an expert. 在英语方面,他是个专家. (7) It was 11 p.m. when he came back last night. 昨晚他回来时已是晚上十一点钟了。 (8) It was at 11 p.m. that he came back last night. 他昨晚上是十一点回来的。（强调句） (9) It has often been said that life is difficult as it is. 人们经常会说生活本身是很艰难的。 (10) It is high time he should come to our house for dinner. 已经到了他该上咱家吃晚饭的时候了。 (11) Don't take it for granted that your parents should support you all your life. 别以为你父母养你一辈子是天经地义的事。 (12) lt's not like Jim to be late for class. He regards time as the most important thing in life. 上课迟到不像吉姆的一贯作风,他把时间看作是生命中最重要的. (13) It was careless of Tom to break the cup. (14) He seems to be very sad. = It seems that he is very sad. 仿练：（1）I’m sorry you’ve been waiting so long, but it’ll still be some time ____ Brian gets back. A. before B. since C. till D. after (2) This is the first time we_____ a film in the cinema together as a family. A．see B．had seen C．saw D．have seen (3) It is the most instructive lecture that I ___since I came to this school. A attended B had attended C am attending D have attended (4) It’s no use ______ without taking action. A. complain B. complaining C. being complained D. to be complained (5) Because of the heavy traffic，it was already time for lunch break____she got to her office． A．since B．that C．when D．until (6) John thinks it won’t be long_____he is ready for his new job. A. when B. after C. before D. since (7) It never occurred to me__you could succeed in persuading him to change his mind. A.which B.what C.that D. if 对比：(1)---Did Jack come back early last night? ---Yes. It was not yet eight o’clock ______ he arrived home. A.before B.when C.that D.until (2) It took me a long time before I was able to fully appreciate what they __ for me. A. had done B. did C. would do D. were doing (3) It was April 29, 2001 ______ Prince William and Kate Middleton walked into the palace hall of the wedding ceremony. A.that B.when C.since D.before (4) As it reported, it is 100 years ___________Qinghua University was founded. A. when B. before C. after D. since 改错：It is time we go home. 填空：用when, before, since或until填空 (1) Few people will pay full attention to their health ___ they get certain incurable disease. (2) Let me take down what you have said ______ I forget. (3) It may take ten years or more ______ the scientists can find a cure for AIDS. (4) It is several weeks ______ my father got drunk last time. (5) We were chatting happily on the Internet ______ the light went out. (6) Three years had passed ______ I knew it.