2020届人教版高考英语选修6知识串讲：unit4

2020届人教版高考英语选修6知识串讲：unit4

人教版选修六-unit 4‎ ‎【基础词汇】‎ ‎1.consume vt.消费;消耗;耗尽;吃完 ‎2.graph n.图表;坐标图;曲线图 ‎3.random adj.胡乱的;任意的 ‎4.phenomenon n.现象 ‎5.subscribe vi.同意;捐赠;订阅　vt.签署(文件);捐助 ‎6.fuel n.燃料　　　　　　　　　　　‎ ‎7.per prep.每;每一 ‎8.catastrophe n.大灾难;浩劫 ‎9.commitment n.承诺;交托;信奉 ‎10.motor n.发动机 ‎ ‎11.can n.容器;罐头 ‎12.microwave n.微波炉;微波 ‎ ‎13.presentation n.显示;演出 ‎14.nuclear adj.核的;核能的;原子核的 ‎【高频词汇】‎ ‎1.quantity n.量;数量 ‎2.tend vi.趋向;易于;照顾　vt.照顾;护理 ‎3.data n.资料;数据 ‎ ‎4.trend n.趋势;倾向;走向 ‎5.flood n.洪水;水灾 ‎ ‎6.mild adj.温和的;温柔的;淡的 ‎7.state vt.陈述;说明 ‎ ‎8.range n.种类;范围 ‎9.glance vi.看一下;扫视　n.一瞥 ‎10.tendency n.倾向;趋势 ‎11.widespread adj.分布广的;普遍的 ‎12.average adj.平均的 ‎13.outer adj.外部的;外面的 ‎14.advocate vt.拥护;提倡;主张 ‎15.pollution n.污染;弄脏 ‎16.electrical adj.电的;与电有关的 ‎17.casual adj.随便的;漫不经心的;偶然的 ‎18.circumstance n.环境;情况 ‎19.refresh vt.使恢复;使振动 ‎20.educator n.教育工作者;教育家 ‎【核心词汇】‎ ‎1.oppose vt.反对;反抗;与(某人)较量→opposed adj.反对的;对立的 ‎2.consequence n.结果;后果;影响→consequent adj.作为结果的 ‎3.steady adj.平稳的;持续的;稳固的→steadily adv.平稳地;持续地 ‎4.existence n.生存;存在→exist vi.生存;存在;有 ‎5.pollution n.污染;弄脏→pollute vt.污染;腐蚀 ‎6.growth n.增长;生长→grow v.增长;生长 ‎7.contribution n.贡献→contribute v.捐助;贡献 ‎8.　disagreement　 n.分歧;不一致→agreement n.协定;协议→　agree　 vi.达成协议;同意 ‎ ‎【词汇拓展】‎ ‎1.名词变复数的不规则变化 phenomenon→phenomena 现象 medium→media 媒体 datum→data 数据 criterion→criteria 标准 bacterium→bacteria 细菌 ‎2.与“电”有关的单词荟萃 electric adj.电的;电动的 electrical adj.电的;与电有关的 electricity n.电;电流 electrician n.电工;电学家 electronic adj.电子的 electrics n.电学 power n.电力;电源 ‎3.与“灾难”有关的名词集锦 earthquake地震 catastrophe大灾难 disaster灾难 flood洪灾 survivor幸存者 victim受难者 ‎4.average用法小结 an average of平均有(后跟数词)‎ on average平均起来 above average平均以上 below average平均以下 average out达到平均数 ‎5.advocate用法小结 advocate doing sth.主张干某事 an advocate of……的倡导者 advocate that...(should)do sth.提倡……做某事 ‎6.quantity用法小结 a large quantity of大量的 quantities of大量的 in quantity大量 ‎【短语】‎ ‎1.subscribe to 同意;赞成;订购　　　‎ ‎2.keep on 继续 ‎3.on the whole 大体上;基本上 ‎4.heat up 升温,加热 ‎ ‎5.run out 用完,耗尽 ‎1.发生;造成 come about ‎2.大量的 quantities of ‎3.上升;增长;升起 go up ‎4.导致 result in ‎5.反对…… be opposed to ‎6.即使 even if ‎7.代表……一方;作为……的代言人 on behalf of ‎8.忍受;容忍 put up with ‎9.只要 so long as ‎10.等等 and so on ‎【短语拓展】‎ ‎1.“动词+about”短语荟萃 come about发生 bring about带来 think about考虑 learn about得知 ‎2.“动词+up with”结构的短语一览 catch up with跟上(强调动作)‎ keep up with与……同步;跟上(强调状态)‎ put up with忍耐;忍受 come up with提出;想出 end up with以……结束 ‎【句式】‎ ‎1.There is no doubt that the earth is becoming warmer...‎ 毫无疑问,地球正在变暖……‎ 考点提炼There is no doubt that...句型。that引导同位语从句,解释说明doubt的内容。‎ ‎2.It is OK to leave an electrical appliance on so long as you are using it—if not,turn it off!‎ 只要你在使用电器设备,你便可以把它开着,如果不用就把它关掉!‎ 考点提炼so/as long as “只要”,引导条件状语从句。‎ ‎【仿写句子】‎ ‎1.毫无疑问,这些理论全都是错误的。‎ There is no doubt that these theories are all wrong.‎ ‎2.只要你每天都不虚度,你就会成功。‎ You’ll make it so long as you make every day count.‎ ‎【语篇填空】‎ ‎　　All scientists subscribe to the view 1.that the increase in the earth’s temperature is due to the burning of fossil fuels like coal,natural gas and oil to produce energy.Some byproducts of this process 2.are called(call)“greenhouse” gases,the most important one of 3.　　which　　 is carbon dioxide.Dr Janice Foster explains:“There 4.　is　(be)a natural phenomenon that scientists call the ‘greenhouse effect’.This is when small amounts of 5.gases(gas)in the atmosphere,like carbon dioxide,methane and water vapour,trap heat from the sun and therefore warm the earth.6.Without the ‘greenhouse effect’,the earth would be about thirty-three degrees Celsius 7.　cooler　(cool)than it is.So,we need those gases.The problem begins when we add huge 8.quantities(quantity)of extra carbon dioxide into the atmosphere.9.　It　 means that more heat energy tends to be trapped in the atmosphere ‎ ‎10.causing(cause)the global temperature to go up.” ‎