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1、Unit2SavingtheEarthTopic2Alltheseproblemsareveryserious.SectionA课件2pollutionmanytreescutdownforestsgonewashtheearthaway冲走changeintodesert转换成，变成沙漠e.g.Alotofrichlandhaschangedintodesertbecausepeoplehavecutdowntoomanytrees.sandstormscomeintobeingn.沙尘暴Theboyandgirlsaretalkingabout—————.differ
2、enttypesofsandstormsthereasonsforsandstormssandstormsindifferentcities1bListento1aandchoosethebestanswer.Focusonthemainideaoftheconversationwhenyoulistenforthefirsttime.√Listenandanswerthequestions1.What’stheweatherliketoday?It’sbad.Thewindissostrong.Andthesandreallyhurtsface.2.Whatcauses
3、thesesandstorms?Peoplehavecutdowntoomanytrees.Asaresult,alotofrichlandhaschangedintodesert.3.Dowestillneedtodosomethingtoprotecttheenvironment?Yes,wedo.Althoughwehavebuilt“TheGreenGreatWall”,westillneedtodosomethingtoprotecttheenvironment.conj.虽然，尽管，即使n.沙somebody,someone,something,somewhe
4、reanybody,anyone,anything,anywherenone,nobody,nothing,nowhereeverybody,everyone,everything,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.Ihave____totellyou.A.importantsomethingB.somethingimportantB形容词修饰不定代词和不定副词时，要放在不定代词/不定副词之后Doyouknow?2.Everybody___readyfo
5、rthematch.A.isB.areA不定代词作主语时，谓语动词要用单数。1cRead1aandcompletetrees’functions.Treescanstopthewindfromblowingtheearthaway.Alotofwatercanbesavedbyforests.Theycanalsostopthewaterfromwashingtheearthaway.Tree’sfunctionsK:wind;sand;anythingM:sandstormsJ:cutdown;asaresult;changeintoM:affectJ:stop…fro
6、m…;blow…awayK:canbesavedJ:wash…awayK:isharmfulto;although;dosomethingActoutthedialoginpairs2Completethesentenceswiththecorrectformsofthegivenphrasesinthebox.asaresult,changeinto,dosomething,stop…from,blow…away1.Peoplehavecutdownsuchalargenumberoftreesthattheland_____________________desert
7、.2.Therearefewertreesleft,sothewindalways_______theearth________.3.Airpollutionhasbecomeaseriousproblem,sowemust______________toreduceit.4.weshouldtryourbestto_________people________cuttingdownthetrees.5.Inthefuture,humanbeingscanprotectthetreeswell._____________,an
