八年级英语下册 Unit 6 The Earth’s Atmosphere复习课件 北京课改版.ppt

unit6theearth satmosphere 本单元的重点知识 1 单词 熟练掌握本单元后单词的音 形 意2 词组 1 bemadefrom由 制造2 bemadeof由 制造3 tinydropsofwater小水滴4 reducewaste减少浪费 5 20milesthick20英里厚6 protect from保护 免遭 7 bemadeupof由 组成8 three fourthsofthegases3 4的气体 9 dependon依靠10 stayalive生存11 beusedto习惯于12 drawworldwideattention吸引世界注意13 blow away吹走14 befullof充满 15 beusedfor用于做某事 句子 1 cloudsaremadeoftinydropswater 云是由小水滴构成的 2 theatmospheresurroundstheearthlikeablanket 大气层像毯子一样包裹着地球 3 theatmosphereprotectstheearthfromthesun sheat 大气层保护地球免遭太阳的炙烤 4 theairintheatmosphereismadeupofdustandgases 大气层中的空气是由尘土和各种气体组成 5 morethanthree fourthsofgasisnitrogen 多于四分之三的气体是氮气 6 plantsdependonnitrogentostayalive 植物依靠氮气来生存 7 morethanthree fourthsofthegasisnitrogen 气体中四分之三的气体都是氮气 8 peoplewhotraveltothemountainsfindithardertobreathe 到山上旅行的人发现这里呼吸比较困难 9 bigcitiesarefullofcars 大城市里都是汽车 10 theyareusedforbusinessandpleasure 他们是用来商务和娱乐的 11 somethingshouldbedoneabouttheuseofcarsinordertohavecleanerair 为了得到更清洁的空气 应该就汽车的使用问题采取措施 六 本单元重点知识讲解 1 theshipismadefromwastematerials thet shirtismadeofcotton 例如 thebookismadeofpaperandpaperismadefromwood theglassismadeofglassandglassismadefromsio2 2 theairthatsurroundstheearthiscalledtheatmosphere 包围地球的空气被称为大气 becalled被称为同义词 benamed例如 theboyiscalled daniu byhisclassmates themachineiscalled washingmachine thatcitywillbecalled watercity 3 itsurroundstheearthlikeablanket 20milesthick 20milesthick20英里厚数字 单位 形容词例如 1 7metrestall一米七高6metreswide六米宽20kilometresaway20公里远 ourclassroomisthreemetrestall 7metreslongand6metreswide theyellowriveris5000kilometreslong itisthesecondlongestriverinchina theriverisabout20metresdeep youmustn tswiminit it stoodangerous 典型例题 theruleris 20厘米长 thebookis 5厘米厚 theholeisabout 50米深 thetreeisnearly 36米高 4 theatmosphereprotectstheearthfromthesun sheat protect from保护 免遭例如 thethickcoatprotectsthebodyfromthecold thehelmetprotectstheheadfromtherock theplasticcoverprotectsthebookfrombeingbroken 5 nothingcouldremainaliveontheearthwithouttheatmospheretoprotectup plantsdependonnitrogentostayalive remainalive存活stayalive存活例如 remainsilentstaycalmremainstandingstayawakeremainthegoalstaycoolremainweakstayquiet dependon依靠 依赖例如 thepeopleinthesouthdependonthegovernment thepandasdependonourgoodcare youcan tdependonyourparentsforever 典型例题 thesuccessoftheolympicgame 依赖 chinesepeople shardwork thepoorchildren 依靠 thoserichpeople ssupport 6 theairintheatmosphereismadeupofdustandgases bemadeupof由 构成 由 组成例如 theclassismadeupof20boysand19girls theteacherteamismadeupof126teachers 7 morethanthree fourthsofthegasisnitrogen three fourths四分之三分数的概念 分数由基数词作分子 序数词作分母构成 分母序数词都用复数 8 peoplewhotraveltothemountainsfindithardertobreathe sb findit adj todosth 某人发现做某事怎么样例如 ifinditveryinterestingtotraveltotheforest theboysfinditverycooltosmoke 典型例题 我们发现早睡觉有好处 we 他发现游过这条河很难 hefound 9 airpollutionhasdrawnworldwideattention drawone sattention引起某人的注意10 bigcitiesarefullofcars befullof 装满 充满 thebagfullofbooks theroomisf