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1、Unit2SavingtheEarthTopic2Alltheseproblemsareveryserious.SectionA城北学校沙尘暴pollution预习导纲读1a，在文中划出下列短语并大声朗读。1、结果_______2、砍倒_________3、变成沙漠_______4、阻止某人做某事________5、人/人类________6、对……有害___________7、吹走______8、冲走____________9、沿大街走_______10、大量肥沃的土地_______二、读下列句子，翻译并探究。1.Treescanalsos
2、topthewindfromblowingtheearthaway.译：__Theycanalsostopthewaterfromwashingtheearthaway.译：__探究：两句均使用了stopsb.(sth.)fromdoingsth.意思为______.此句型可用_______来替换。在口语中，from可省去。同类句型还有_______、____________.但from不能省略。练一练：——It’stoocoldtoday.Remembertowearamask(面罩)to_____youfromcatchingacold.
3、——Ok，Iwill.A.preventB.encourageC.provideD.destroy2.Cuttingdowntreesisharmfultohumanbeings,animalsandplants.译_________探究：cuttingdowntrees是____词短语在句子中作___语，谓语用______数。练一练：1)散步是我的爱好。myhobby.2)阅读使人完美。aman.3.Althoughwehavebuilt“TheGreatGreenWall”,westillneedtodosomethingtoprotec
4、ttheenvironment.译_____探究：although是词，有“虽然，尽管”和“不过，然而”两层意思，引导状语从句，可以和互换，although较正式，更为口语化，使用更普遍些。注意：although引导的从句不能与but,however同时连用，但常与yet,still连用。练一练：虽然他老了，但是他仍然继续努力工作。_________he_____old,hestill_________workinghard.manytreescutdownforestsgonewashtheearthaway冲走changeintodese
5、rt转换成，变成沙漠e.g.Alotofrichlandhaschangedintodesertbecausepeoplehavecutdowntoomanytrees.sandstormscomeintobeingn.沙尘暴Theboyandgirlsaretalkingabout—————.differenttypesofsandstormsthereasonsforsandstormssandstormsindifferentcities1bListento1aandchoosethebestanswer.Focusonthemaini
6、deaoftheconversationwhenyoulistenforthefirsttime.√Listenandanswerthequestions1.What’stheweatherliketoday?It’sbad.Thewindissostrong.Andthesandreallyhurtsface.2.Whatcausesthesesandstorms?Peoplehavecutdowntoomanytrees.Asaresult,alotofrichlandhaschangedintodesert.3.Dowestillnee
7、dtodosomethingtoprotecttheenvironment?Yes,wedo.Althoughwehavebuilt“TheGreenGreatWall”,westillneedtodosomethingtoprotecttheenvironment.conj.虽然，尽管，即使n.沙somebody,someone,something,somewhereanybody,anyone,anything,anywherenone,nobody,nothing,nowhereeverybody,everyone,everything
8、,everywhere一般情况下用于肯定句一般情况下用于否定句和疑问句表否定含义可用于各种句式theindefinitepronounandadverb1.Ihav
