重庆市北大附中重庆实验学校高三英语《IT的用法》课件.ppt

it的用法用作人称代词 代替前文提到过的东西 eg whereismybook it sonthetable eg youhavesavedmywifeandishallneverforgetit 2 用以代替指示代词this和that eg whatisthis it saflag eg whosebookisthat it shers 3 用以表示时间 天气 自然环境 距离等 eg iglancedatmywatch itwasearlierthanithought eg itoftenrainsinsummer eg it sveryquietinthecaf eg howfarisitfromyourofficetothebank 4 用来表示是谁做某动作 eg whoisit it sme eg why it syou hecried 5 当动词不定式 动名词或从句做主语时 通常把它们放在后面 而用it做句子的形式主语 eg it snicenottobedependentonthem eg ittakestwotomakeaquarrel eg itisnousecryingoverspiltmilk eg it sbeenalotoffunmeetingyou eg itissaidthatheisacriminal eg howwasitpossiblethatamancanfallsolow 注意 这种从句中的谓语有时需用虚拟语气 eg itwashissuggestionthati should comeroundtoyou eg itwasnecessarythati should getthewritingtyped eg it sveryimportantthathe should gototheschoolofart 6 形式宾语 代表不定式 动名词或从句 eg itisapitythatyoudidn treadthebook eg ifounditveryinterestingtostudyenglish eg ithinkitnousearguingwithhim 7 用来改变句子结构 使句子的某一成分得到强调 eg itwasin1975thatiworkedinthefactory eg itwasinshanghaithatisawtheexhibition eg wasityouthat who brokethewindow eg itwasthepresidentthatheshotyesterday 注意对比 1 itwasfiveo clock jackarrivedyesterday 2 itwasatfiveo clock jackarrivedyesterday 3 wasitinthemuseum imetyou 4 wasitthemuseum imetyou 注意对比 1 itwasnotuntilisawmarynextmorningthatifelthappy 强调句 ididn tfeelhappyuntilisawmarynextmorning 2 itwasnotforseveraldaysthatihadanopportunityofseeingthebirdagain 强调句 ididn thaveanopportunityofseeingthebirdforseveraldays that where exercises howlong tofinishthework you lltakeb willtakeyouc you lltakeitd willittakeyou2 itwasthroughjack marygottoknowbob whob whomc howd that3 itwassimplyforthatreason iwouldn ttellhimthetruth a whyb thatc whichd so d willittakeyou d that b that 4 itwas iwentthere ibegantoknowsomethingaboutthematter until whenb until thatc notuntil thatd notwhen that5 itwasonoctober1st1949 newchinawasfounded whichb whenc asd that6 willtakeyoualotoftimetofindhiminthecrowd a itb ic wed they c notuntil that d that a it 7 let sgetthroughtheworkquickly seemstobelittletimeleftnow itb therec thatd here8 isdifferentbetweenaandb thereb itc whered what9 isnodifferencebetweenaandb a thereb wherec itd what b there b it a there 10 hesaid alongwaytoschool alongwaytogoyetbeforewearrive a itis thereisb thereis itisc itis itisd thereis thereis11 thereisaphotoonthewall aphotoofleifeng itb it sc itsd he s12 hisfatherkepttellinghimthatheshouldworkharder but didn thelp a itb hec whichd she a itis thereis b it s a it 13 hefelt toworkforhumanrightsandprogress a ithisdutyb hisdutyc thatisadutyd thatishisduty14 peopleinthewestmake aruletobuychristmaspresentsfortheirrelativesandfriends thatb itc thisd as15 needsfurtherdiscussionwhetherwe llbuildalibraryornot a thatb thisc itd thething a ithisduty b it c it 16 wefound possibletogetridofthenuclearwaste thatb thisc d it17 ithink rightthatyoudidn tgothere youb thatc itd its18 isnotgood withoutdoinganything this talkingb it totalkc it talkingd that totalk d it c it c it