高中英语选修六 Unit 04 BPPT课件.ppt

Learningaboutlanguage Ex 1 trend fuel state consume glance 1 2 2 1 2 Ex 2 data keptonquantities runoutbuildup catastrophe comeaboutconsequencephenomenon graphperevenifresultedin Learningaboutlanguage Ex 1 Itisscientistswhowarnedthatgreenhousegaseswouldwarmtheearthbytrappingheatenergyintheatmosphere itistheburningofmoreandmorefossilfuelsthathasresultedinthisincreaseincarbondioxide Ex 2 Itisscientistswhowarnedthegreenhousegaseswouldwarmtheearthbytrappingheatenergyintheatmosphere Itisthegreenhouseeffectthatgivestheearth ssurfacetheaveragetemperatureof15 Itisfossilfuelsthatmuchoftheenergyusedtolightandheatourhomescomesfrom Itisthedevelopedcountriesthatconsumethemostenergyintheworld Itisforcenturiesthatcarbondioxidehasthetendencytostayintheatmosphereonlyforadayorless Itistheirveryexistencethatlow lyingcountriesfeelisindangerfromrisingsealevels Itisenvironmentalistswhohavetriedtostoptheearth stemperaturerising Itisfutureclimatechangesandtheireffectsonourenvironmentthatscientistswanttofindoutabout Itisbyseveralmetersthattheleveloftheseacouldriseintheyearsaheadbecauseofglobalwarming Itisouterspacethatmightprovideuswithnewenergysourcesinthefuture Theuseofit 2 Unit4Grammar 在上一单元我们已经讲解了it在句中可以用作许多成分 在本单元我们用图表的形式进行整理使同学们对it的用法有系统的掌握 我们用图表的形式对it的用法进行的归纳 相信同学们已经对it的用法有了更清晰的认识 接下来我们对it在强调句中的用法做一小结 用在强调句型中 为了强调句子的某一成分 通常是主语 宾语或状语 常用结构 Itis was 被强调部分 that who ImetTominthestreetyesterday ItwasIwho that metTominthestreetyesterday ItwasTomthatImetinthestreetyesterday ItwasinthestreetthatImetTomyesterday ItwasyesterdaythatImetTominthestreet 主语 宾语 时间状语 地点状语 1 Peterlentusthemoney 2 Theywantmoney 3 AllthishappenedonMonday ItwasPeterwholentusthemoney Itismoneythattheywant ItwasonMondaythatallthishappened 根据划线部分把下列句子变成强调句 4 Ididn thearfromheruntillastsummer 5 WhydoeseveryonethinkIamnarrow minded ItwasnotuntillastsummerthatIheardfromher WhyisitthateveryonethinksIamnarrow minded 口诀 代词it本意它 既可指这又指那 时间天气均可指 谈到距离也用它 假主假宾均可作 强调句型跟that it在句子中可以作如此多的成分 那么我们如何区分it在句中的不同成分呢 1 Itistwoyears Ijoinedthearmy A beforeB sinceC thatD after2 Itwastwoyears Ijoinedthearmy A beforeB sinceC thatD after Practice 3 Itwasnotuntil1920 regularradiobroadcastbegan A whileB whichC thatD since4 isafactthatEnglishisbeingacceptedasaninternationallanguage A ThereB ThisC ThatD It 5 Itwasabout600yearsago thefirstclockwithafaceandanhourhandwasmade A thatB untilC beforeD when6 Ihate whenpeopletalkwiththeirmouthsfull A itB thatC theseD them 7 TheParkersboughtanewhousebut willneedalotofworkbeforetheycanmovein A theyB itC oneD which8 noneedforustodiscusstheproblemagainsinceithasalreadybeensettled A IthasB TherehasC ItisD Thereis 9 wasin1979 Igraduatedfromtheuniversity A That thatB It thatC That whenD It when10 Whatapitymynewcomputerdoesn twork mustbesomethingwrongwithit A ItB ThereC ThisD That 11 Ilike intheautumnwhentheweatherisclearandbright A thisB thatC itD one12 Someoneisknockingatthedoor butwhocan be A oneB heC sheD it 13 Aknockonthedoormadehimlookup But wasonlythemanager A thisB thatC sheD it14 Someoneisringingthedoorbell Goandsee A whoisheB whoheisC whoisitD whoitis 15 Is necessarytocompletethedesignbeforeNationalDay A thisB thatC itD he16 Does matterifhecan tfinishthejobontime A thisB thatC heD it 17 worriedherabitthatherhairwasturninggrey A ThatB ItC WhatD This18 Theyhavemade arule intheroom A this nottosmokeB it smokingC it tonotsmokeD it nottosmoke Itwasbecauseofbadweather thefootballmatchhadtobeputoff 2003上海春 A soB sothatC whyD that 高考链接 2 Itwaswithgreatjoy hereceivedthenewsthathislostdaughterhadbeenfound 2004福建 A becauseB whichC sinceD that 3 Itwasaftertheinventionofprinting topublishlargenumbersofbooksandpictures 2005上海春 A werepeopleableB thatpeoplewereableC whenwerepeopleableD peoplewereable 4 Itwasafterhegotwhathehaddesired herealizeditwasnotsoimportant 2006辽宁 A thatB whenC sinceD as 5 Itisimagination makestheworldcolorful fullofvigorandvitality 2007上海春 A whereB whatC thatD when 6 Itisnotwhoisrightbutwhatisright isofimportance 2007重庆卷 A whichB itC thatD this 1 It sdifficulttorememberalltheirnames 2 It sveryquietinthecaf 3 Itrainedforthreedays 4 Hemadeitclearthathedidn twanttospeaktome 5 Itwasnicetomeetyou 形式主语 代替 Circumstance Weather 形式主语 代替 Discussthefollowingsentencesandtellthefunctionof it 形式宾语 代替 6 ItwasonTuesdaythatSmithcame 7 It sthreemilesfromheretothenearestgarage 8 Atallmanstoodupandshookhands ItwascaptainJim 9 Ihearyouboughtanewbike Canyoushowittome 用于强调句型中 Distance 人称代词 代表前面提到的人 人称代词 代表前面提到的物 10 Itwasfiveo clockwhenwegotbackhomeyesterday 11 Itwasdi