高中英语语法大全1(4)

       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.
       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
       例  It's 10 years that he lived here
       6. 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。