It”用法及其句型和固定搭配讲解

1、精品文档“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-

2、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 Its 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Its no good/use doingIts (well)worth doingIts (well)worth ones wh

3、ile doing/to doIts (well)worth while doing/ to do例 Its 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. +clauseIts surprising that (should) 竟然Its a pity/shame that (should) 竟然例 Its important that you should apologize to her for your rudeness.(=Its of much importance that you should apologize to her for your rudeness.)(3) It verb sb. + clause= It is v-ing + clauseIt+surprise/delight/inter

4、est/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,

5、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. Its (just)(un)like sb. to do(不)像某人做某事的风格例 It was

6、 (just) like him to think of helping us.3. Its (about/high) time that should /v-ed 是该做某事的时候了例 Its(about/high) time that we should take action.4. Its the x-th time (that) have v-ed 第几次做某事了例 Its 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 Its 10 years that he lived here6. 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

7、./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 youll do the task on your own.2. verb+it+adj./noun (ones) doing (adj.=useless/worth/worthwhile)(noun=no use/no good/worth ones while/a waste of time/money/energy/words) (verb=think, believe, suppose, consider, feel, make, keep)例 Ill make it worth your while telling me about his secret.3. verb+it+ important/unimportant/necessary/unneces

8、sary/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 whenso 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 Dont bother

9、 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, dont 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 cant.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 Im 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 didnt come to school yesterday.3. 在强调notuntil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 rea

《It”用法及其句型和固定搭配讲解》由会员大米分享，可在线阅读，更多相关《It”用法及其句型和固定搭配讲解》请在金锄头文库上搜索。