高考英语一轮复习It的用法和there be结构语法回顾与训练

高考英语一轮复习It的用法和there be结构语法回顾与训练1.代词it常用来指代前文提到的事或物，还用在各种特殊句型中。

there be表示“存在”，可用在不同时态和句型中。

2.考点归纳一、it用法1. it用作形式主语（1）It + be + adj. + 主语从句It is clear（obvious / true / possible / certain…）+ that / whether…从句…It is essential（important / necessary / right / strange / natural…）+ that从句…（should + 动词原形）It is uncertain whether he can come to Jenny’s birthday party or not.It is important that we should learn English well.（2）It + be + 名词词组+ 主语从句It’s a pity that you missed the exciting foot ball match.（3）It + 不及物动词（seem / appear / happen / turn out…等）+ 主语从句（看来/ 似乎/ 碰巧/ 证明是）It seemed that he didn’t tell the truth.It happened that I was out when he called.（4）It’s + adj. + for / of + sb. + to do sth特别注意：如何选择介词for 或of？如果该句型中的形容词是用来说明“某人”的性格或品质（如kind, good, nice, wise, stupid, clever, foolish, silly, impolite, selfish, considerate ...）时，介词用of（“某人”和这些形容词可以构成主系表结构），其它情况介词用for。

It + be + adj. (easy / difficult / hard / important / possible / necessary...) + for sb + to do sthIt + be + adj. (kind / nice / clever / stupid / foolish / silly / impolite / selfish / considerate ...) + of sb + to do / have done sth.It is unwise of you to give children whatever they want. 孩子需要什么你就给什么是不明智的。

It is necessary for you to turn to your teachers when in trouble. 你遇到困难时求助老师是必要的。

（5）It + be + n. & adj. (no good / no use / useless / senseless / a waste of time (money) /…) + v.-ingIt is no use arguing about the matter with him.（6）It + took / will take (sb) + 时间（或金钱）+ to do sth.It took the workers almost three years to finish building the dam.2. it用作形式宾语主语+ find / make / consider / feel / think / believe / imagine / regard / suppose… + it（形式宾语）+ adj.& n. + to do sth.或句子（真正宾语）Remembering more words and expressions, you will find it easier to read and communicate. =Remember more words and expressions, and you will find it easier to read and communicate.3. it在特定句型中的运用（1）It (never) occurred to / came to / hit / struck sb. that… 某人（从没）想到…It never occurred to me that you could succeed in persuading him to change his mind. （2）It is / has been + 时间段+ since从句(过去时态) … 自从…以来有…久了It is / has been two weeks since you came to our school for the exchange program, which has benefited all of us.（3）It is the first / second / last time that + sb. has / have done sth. 是某人第…次做某事It was the first / second / last time that + sb. had done sth. 是某人第…次做某事Unfortunately he didn’t win this year. It was the second time that he had been nominated（提名）,but gone home empty-handed.（4）It was / took + 一段时间+ before从句（过了…时间才…）It will be / will take + 一段时间+ before从句（要过…时间才…）It wasn’t / didn’t take + 一段时间+ before从句（没过…时间就…）It won’t be / won’t take + 一段时间+ before¬从句（过不了…时间就…）After that it still took seven years before they got married.I’m sorry to have kept you waiting, but it’ll still be some time before Brian gets back. It didn’t take long before new trouble arose.It won’t be long before we meet again.（5）It’s (high / about) time that + sb. did sth. / should do (should不可省)（是…的时候了）The final examination is coming soon, it’s about time that we got down to/should get down to our studies.（6）It is suggested / required / ordered / insisted/… that sb. should do sth（据建议/ 有命令…）It was ordered that we (should) arrive there in two hours.（7）It is…when从句（当某事发生时，时间是在…）It was 10 o’clock when they arrived at the village.注意: when引导的是一个时间状语从句，主句中的it指时间。

（8）主语+ make + it + a rule + to do / that从句（定规矩；习惯于）主语+ make + it + clear + that从句（明确表示；阐明）I made it a rule to recite five sentences each day.He made it clear that he totally agreed with what I said.（9）It is said / reported / learned / assumed / announced /…that从句… =sb. / sth. is said / reported / learned / assumed / announced /… to do /to have done （据说/ 报道/ 了解/ 推测/ 宣称…）（10）It looks / seems / appears / sounds as if¬从句（看起来好像…；听起来好像…）注意：as if引导一个状语从句，如果与事实不相符合，则用虚拟语气。

（11）It remains to be seen whether / when /…从句（有待证实）（12）hate / dislike + it + when / if¬从句（讨厌…）（13）appreciate + it + if¬从句（假如…，将不胜感激）（14）see to / answer for / depend on / insist on it + that¬从句（确保/ 对…负责/ 指望/ 坚持）（15）How did it come about that +¬从句（…怎么发生的？）（16）It doesn’t matter / makes no difference + 特殊疑问词+ ¬从句（不论…都没关系）（17）(It is) no wonder (that) +¬从句（难怪…）（18）took it for granted that + 从句（把…当做理所当然）二、there be结构用法1. there be句式译作“有”，它有不同的时态，而且可以和各种助动词、情态动词连用。

There have been many great changes in our country since the reform.There can be some mistakes in his passage.There is a pen, two books and many pencils on the desk. (就近原则)2. there be句式中，be可用seem / appear (to be), happen to be, is likely to be, used to be或remain, stand, lie, go, exist, follow, live, come, occur等替换，视作there be句型的变式。