高中英语语法-“It”用法及其句型和固定搭配讲解(1)-查字典英语网
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高中英语语法-“It”用法及其句型和固定搭配讲解(1)

发布时间:2016-02-29  编辑:查字典英语网小编

  It用法及其句型和固定搭配讲解(1)

    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 at office.

    (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 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,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.[1][2][3]

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