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1、语法专题十：it的用法1.指代事物、动物、婴儿或未知的人。2.指天气、时间、距离、自然现象、环境等。3.代替不定式，作形式主语或形式宾语(常与feel,consider,find,believe,make,take,imagine,think,suppose,regard等连用)。4.代替动名词，作形式主语或形式宾语：Itisnogood/nouse/useless/dangerous+doingIthinkitnogood/nouse/useless/dangerous+doingIthinkitnousecomplainingab
2、outtheirprejudice.5.代替主语从句、宾语从句，作形式主语或形式宾语：Itseems/appears/happens/turnsout/proves+that…Itiscertain/likely/possible/probable+that…Wehavemadeitclearthatshehasnothingtodowiththecase.6.用于强调句：Itis/was…that/who…Astudentwitnessedthecaraccidentattheturninglastnight.(1)(2)(3)(4
3、)(1)_________________________________________________________.(2)_________________________________________________________.(3)_________________________________________________________.(4)_________________________________________________________.Itisnotuntil+被强调的部分+that…
4、Ididn’trealizeshewasafamousfilmstaruntilshetookoffherdarkglasses.________________________________________________________________.7.其他重要句型：Itisimportant(necessary,right,strange,natural)that…（should+动词原形）Itissaid(reported,learned…)that…Itissuggested(ordered…)that…（should
5、）+动词原形Itisapity(asham)that…（should）+动词原形Ithappens(seems,looks,appears)that...Itoccurstosb.todo/that…：使某人想起……Itis/hasbeen+一段时间+since...+过去时Itwillbe+一段时间+before...Itlooks(seems)asif…Itisnowonder…：难怪Whenitcomesto…：当谈到……Itcomesaboutthat…：发生8.appreciate,love,like,hate,seeto(
6、负责，注意)+it+从句巩固练习：1.It took us over an hour ______ along the street. A.walkB.to walkC.walkingD.walked 2.I think it a great honour ______to visit your country. A.to inviteB.invitingC.having invitedD.to be invited 3.Many people now make ______a rule to buy cards for their
7、friends before Christmas. A.themselvesB.itC.thatD.this 4. ______is very clear to everyone that he's round and tall like a tree. A.This B.WhatC.ThatD.It 5.---It is raining cats and dogs.---______ . A.So it isB.So is itC.Neither it isD.Neither is it 6.It's no use ______o
8、ver spilt milk. A.cryB.cryingC.that you cryD.for you to cry 7.It is important ______ their offer. A.rejectB.r
