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Unit2SavingtheEarthTopic2Alltheseproblemsareveryserious.SectionBSectionBEarthSongmp4揭西县第一中学陈伟婷soilpollutionairpollutionlightpollutionnoisepollutionlitterThewindisblowingstronglywithlotsofsand.Wecallitsandstorm.[sænd]n.沙,沙子['sændst:m]n.ɔ沙尘暴Doyouknowhowsandstormscomeintobeing(形成)?Nowpleaselookatthepicturesin1candnumberthem.Numberthepicturesandthentalkaboutthem.()()()()()()()()()()()()415362manytreesforestsgonePeoplehavecutdowntoomanytrees.cutdown砍倒washtheearthawayAlotofearthhasbeenwashedaway.Why?Becausepeoplehavecutdowntoomanytrees.1.Treesalsostopthewind(from)blowingtheearthaway.2.Theycanalsopreventthewater(from)washingtheearthaway.prevent[pri'vent]v.防止，预防点拨：stopsb./sth.(from)doingsth.=preventsb./sth.(from)doingsth.阻止…做某事链接：同义词组keepsb./sth.fromdoingsth.阻止…做某事(from可以省略)(from不可以省略)changeinto转换成，把……变成desert['dezət]n.沙漠Theforesthaschangedintodesert.sandstormscomeintobeingTalkabouthowsandstormscomeintobeing.cutdowntreescutdowntreesmanytreesforestsgonewashtheearthawaychangeintodesertsandstormscomeintobeingListento1a,answerthequestions.Whataretheytalkingabout?Whatcausesthiskindofbadweather?Theyaretalkingaboutsandstorms.Peoplehavecutdowntoomanytrees.Alotofrichlandhaschangedintodesert.（录音p35-1a）Cuttingdowntoomanytreesisharmfulnotonlytohumanbeings,butalsotoanimalsandplants.humanbeing人Watchthecartoonandanswerthequestion.Whataretrees’functions?Treescanstopthewindfromblowingtheearthaway.Alotofwatercanbesavedbyforests.Treescanalsopreventthewaterfromwashingtheearthaway.A.B.C.35-1a.swfInordertoprotecttheenvironment,wehavebuilt“TheGreatGreenWall”.Althoughwehavebuilt“TheGreatGreenWall”,westillneedtoworkhardtoprotecttheenvironment.although[:l‘ðəu]conj.ɔ虽然，尽管同义词组:though、evenif/though注意：although、though引导的从句不能与but、however同时出现在一个句子中，只能用其中一个。Althoughhewasold,butheworkedhard.Althoughhewasold,heworkedhard.Hewasold,butheworkedhard.×√√在1a中找到并划出下面的短语1.刮大风2.伴有很多沙尘3.走在路上4.刚才5.砍伐太多的树木6.造成沙尘暴7.结果8.大量富饶的土地9.变成沙漠10.阻止大风刮走泥土11.阻止流水冲走泥土12.对人类有害13.绿色长城14.需要努力工作1.刮大风blowstrongly2.伴有很多沙尘withlotsofsand3.走在街上walkdownthestreet=walkalong/onthestreet4.刚才justnow=amomentago5.砍伐太多的树木cutdowntoomanytrees=cuttoomanytreesdown6.造成沙尘暴cause/creatthesesandstorms7.结果asaresult8.大量富饶的土地alotofrichland9.变成沙漠changeintodesert=turnintodesert10.阻止大风刮走泥土stopthewindfromblowingtheearthaway11.阻止流水冲走泥土preventthewaterfromwashingtheearthaway12.对人类有害beharmfultohumanbeings=doharmtohumanbeings13.绿色长城TheGreatGreenWall14.需要努力工作needtoworkhard1.Whatbadweather!=Howbadtheweatheris!总结：What引导的感叹句What(a/an)+形容词+___________+（S+V）！链接：How引导的感叹句a.How+_____________+（S+V）！常用于感叹句中的不可数名词有:food,news,work,weather,music，fun等形容词/副词名词练习：（一）用“what”或“how”填空1）____high（WuPengjumps）！2）____aninterestingfilm（itis）！3）____bright（thesunis）!4）____well（hewritesEnglish）！5）____usefulwork（theyhavedone）!WhatWhatHowHowHow2.Icouldn’tseeanything,andmyfacehurtwhileIwaswalkingdownthestreetjustnow.点拨：not…anything=_________练习：Thepolicefoundnothingintheroom.=Thepolice________find_________intheroom.点拨：while引导的从句的谓...