It用法及其句型和固定搭配专练资料.docVIP

“It”用法及其句型和固定搭配专练 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? 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 doing…??????????????? ?????? Its (well)worth doing…?? ?????? Its (well)worth ones while doing/to do… ?????? Its (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. +clause ?????? Its 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 + 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 = ap