选修六 4.2Unit 4　Language Study .ppt

新课标人教版课件系列 高中英语 选修 模块 6 4 2 languagestudy asampleposter discoveringusefulwordsandexpressions p28 gooverthenewwordsandphrasesintheprevioussections thencompleteeachsentencewithoneofthosenewwordsorphrases 1 1 charleskeelingcollected onthecarbondioxidecontentintheatmosphereoveraforty yearperiod hefoundthattheamountofcarbondioxide increasingduringthattime data kepton 2 althoughweareburningcoalinhuge everyyear wewon t ofitforcenturies 3 iftheamountofgreenhousegasescontinuesto wecouldbefacingaglobal quantities runout buildup catastrophe 4 manyscientistsbelievethatglobalwarminghas throughtheburningoffossilfuels theydonotthinkthatignoringtheissueisworththe comeabout risk 5 describesweatherconditionsoveraperiodofyearsinaparticularplace climate 6 the ofarisingsealevelwouldbewidespreadflooding 7 theuseofenergyinsusanna scountryislow theuseofenergyintheusa consequence comparedto 8 thewarmingoftheearthisa thatcausesgreatconcern 9 the showstemperaturechangesduringthe20thcentury 10 onehectareofforestcanabsorb23tonsofcarbondioxide year phenomenon graph per lookatthetwographsonpage26 thencompletetheparagraphsaboutthemwithappropriatewords thefirstgraphshowstheglobal between and 2 temperature 1860 2000 thetemperature anddecreasedoverthisperiodbutonthewholeit byaroundonedegreefahrenheit duringthistime theearthreachedits temperatureinabout anditshighestin2000 increased rose lowest 1910 therewasasteady inthetemperatureduringthetwentyyearsafter1980 wecanseefromthegraphthattheearthhasbecome sinceearlylastcentury thesecondgraphshowstheamountof inthe increase warmer carbondioxide atmospherefrom to thecarbondioxide steadilyoverthisforty yearperiod itwentupfrom315to370parts million 1957 1997 per wentup completethesentencesbelowwiththecorrectword useanewwordmadefromawordontheleftandasuffixontheright usingwordsandexpressions p63 1 1 thosefactoriesarecausingalotof withalltheirnoiseandsmoke 2 yesterdaytheprimeministermadea announcingnewlawstoreducewaterpollution pollution statement 3 thetwocountrieshavereachedan onthelevelsofgreenhousegasestheywillallow 4 thequalityoftheairwouldimproveiftherewasa intheuseofcoal agreement reduction 5 theincreaseintheuseoffossilfuelscouldhave resultsfortheearth 6 wehavelostthousandsoftreesbecauseofafirestartedbyan storm catastrophic electrical 7 thisspeciesoffrogistheonlyonein inthisarea theresthavedisappeared 8 thetwocountriesare intheiruseofnaturalgas existence comparable 9 pastaccidentshaveshownthatbuildingnuclearpowerstationscanbe 10 manypeopledon tunderstandthe oftheworld senvironmentalproblems risky seriousness 11 iwonderwhetherthesefloodshavebeencausedby changes 12 itisextremely thattheworldwillstopusingfossilfuelsthiscentury climatic doubtful answerkeyforexercise2p64 1 itwouldmakeabigdifferencetoourenvironmentifweplantedmoretreesaroundtheschool 2 2 theresearchresultedinabetterunderstandingofchangesintheclimate 3 ithinkourconferencewasverysuccessfulonthewhole 4 thereisawiderangeofenergysources coal oil naturalgas waterpower nuclearpowerandsoon 5 ithinkpeopleturnuptheheatintheirhousestoohighandjustwasteenergy 6 evenifthereisasteadydecreaseintheuseofoilfuels theearthwillstillkeepwarmingup 7 theheadmasterhasstatedthatheisnotgoingtoputupwithlitteringintheschool 8 sinceyourbicycleisbrokenyoucanusemine solongasyoutakecareofit 9 theconsumptionoftheenergyresourcesintheusaisalmost6timesasmuchastheaverageconsumptionofthewholeworld 10 i veglancedatyourplansonowiwantyoutofinishyourfinalreport answerkeyforexercise1 1 itwasascientistcalledcharleskeelingwhomadeaccuratemeasurementsoftheamountofcarbondioxideintheatmospherefrom1957to1997 discoveringusefulstructures p29 2 theyalsobelieve itistheburningofmoreandmorefossilfuelsthatisresultinginthisincreaseincarbondioxide explanation由it引导的强调句结构 itis was 被强调部分 that who 句子其他部分注意 此结构强调的成分仅限于主语 宾语和状语 如 原句 myfatherdidtheexperimentinthelabyesterdayevening 强调主语 itwasmyfatherwho thatdidtheexperimentinthelabyesterdayevening 强调宾语 itwastheexperimentthatmyfatherdidinthelabyesterdayevening 强调时间 itwasyesterdayeveningthatmyfatherdidtheexperimentinthelab 强调地点 itwasinthelabthatmyfatherdidtheexperimentyesterdayevening e g itwasinthatcitythatwemetforthefirsttime itwasnotuntilhetoldmethatiknewthetruth 典型例题分析 1 itwaslastnight isawthefilmstarwars a whob whenc thatd which 答案c强调句的结构是 it be 强调部分 that who 主谓句 强调句的连词只有两个 that和who 当强调的部分是人 且为句子的主语时 才用who 其余用that 2 itistenyears missgreenreturnedtocanada a thatb whenc sinced as答案c考点是连词用法 本题易误选为a其实本句不是强调句 若是去掉itbe that还应是一个完整的句子 而本句去掉 itis that 只剩下tenyearsmissgreenreturnedtocanada不成句 因此本句不是强调句 itis 时间 since 其中is hasbeen 1 itwasthisvillage iwasbought a whereb thatc onwhichd which 练习 2 itwasinthisvillage iwasboughtup a whereb thatc onwhichd which 3 wasitunderthetree youwereawaytalkingtoafriend sure butwhenigotbackthere thebikewasgone a thatb wherec whichd while answerkeyforexercise2 1 itisgreenhousegasesthathavewarmedtheearthbytrappingheatenergyintheatmosphere 2 itisthegreenhouseeffectthatgivestheearth ssurfacetheaveragetemperatureof15 c 3 itisfossilfuelsthatmuchoftheenergyusedtolightandheatourhomescomesfrom 4 itistheunitedsatesofamericathatisthebiggestproducerofgreenhousegases 5 itisforcenturiesthatcarbondioxidestaysintheatmospherewhileothergreenhousegasesstayintheatmosphereonlyforadayorless 6 itistheirveryexistencethatlow lyingcountriesfeelisindangerfromrisingsealevels 7 itishumanactivitiesthatmanyscientistsbelievehavecausedtheearth stemperaturetorise 8 itisfutureclimatechangesandtheireffectsonourenvironmentthatscientistswanttofindoutabout 9 itisbyseveralmetresthattheleveloftheseacouldriseintheyearsaheadbecauseofglobalwarming 10 itisouterspacethatmightprovideuswithnewenergysourcesinthefuture giveafullanswertoeachquestionaboutmillenniumkidsusingtheformitis was that usingstructures p64 whenwasthefirstchildren sconferenceontheenvironmentorganizedinaustralia itwasin1996thatthefirstchildren sconferenceontheenvironmentwasorganizedinaustralia 2 whorunsmillenniumkids itischildrenthat whorunmillenniumkids 3 wherecanyoufindoutmoreaboutmillenniumkids itisontheinternetthatyoucanfindou