高二英语It用法及其句型和固定搭配讲解
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高中英语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-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 It's 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
It's no good/use doing…
It's (well)worth doing…
It's (well)worth one's while doing/to do…
It's (well)worth while doing/ to do
例 It's 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 atoffice.
(2) It is adj. +clause
It's surprising that… (should)………竟然……
It's a pity/shame that…(should)………竟然……
例 It's important that you should apologize to her for your
rudeness.(=It's of much importance that you should apologize to her for your rudeness.)
(3) 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 shedrove 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,decide, determine, intend, plan, understand, know)
例 It is said that the couple have gotten divorced.(=The couple are said to have gotten divorced.)
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. 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.
3. 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.
4. It's the x-th time (that) … have v-ed…第几次做某事了
例 It's 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
6. It was(not)… before…过(不)了多长时间某动作发生了
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./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 you'll do the task on your own.
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.
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) attendthe conference.
4. verb + it+ as+ noun/adj.+ clause (verb=accept, regard, take, see,view)
例 The lecturer takes it as encouraging when so many students attendhis 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 Don't bother 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, don't 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 can't.
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 I'm 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 didn't come to school yesterday.
3. 在强调not … until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 realized she was my brother.
4. 注意强调句型与定语从句的区别
例 It was at 7 o'clock that he came here yesterday.( 强调句型)
It was 7 o'clock when he came here yesterday.(定语从句)
高中是人生中的关键阶段，大家一定要好好把握高中，编辑老师为大家整理的高二英语It用法及其句型和固定搭配，希望大家喜欢。
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