仁爱英语九年级上册Unit2Topic2SectionA.ppt

01Unit2SavingtheEarthTopic2Alltheseproblemsareveryserious.02SectionA0304城北学校沙尘暴05pollution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.Treescanalsostopthewindfromblowingtheearthaway.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.——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”,westillneedtodosomethingtoprotecttheenvironment.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changeintodesert转换成，变成沙漠e.g.Alotofrichlandhaschangedintodesertbecausepeoplehavecutdowntoomanytrees.sandstormscomeintobeing沙尘暴Theboyandgirlsaretalkingabout—————.differenttypesofsandstormsthereasonsforsandstormssandstormsindifferentcities1bListento1aandchoosethebestanswer.Focusonthemainideaoftheconversationwhenyoulistenforthefirsttime.√Listenandanswerthequestions1.What’stheweatherliketoday?It’sbad.Thewindissostrong.Andthesandreallyhurtsface.2.Whatcausesthesesandstorms?Pe