Topic2Unit2SavingtheearthSectionALearningobjectivesAfterlearningthelesson,wecan:01020304Learnsomecorewordsandexpressionsofthetext;KnowabouttheusageofIndefinitePronounandAdverb.Understandthedialogaboutsandstorms.Talkabouthowsandstormscomeintobeing.重點探究1aListen,lookandsay.(Kangkang,MariaandJanearetalkinginaroom.Thewindoutsideisblowingstrongly.)Maria:Whatastrongwind!Kangkang:Yes.Butit’sbetterthanthelastfewyears.Thereweresandstormsbefore.WhileIwaswalkingdownthestreet,Icouldn’tseeanything.Thesandreallyhurtmyface.Maria:Whywastheweathersobad?Jane:Peoplecutdowntoomanytrees.Asaresult,alotofrichlandchangedintodesert.Treescanstopthewindfromblowingtheearthaway.Kangkang:Andalotofwatercanbesavedbyforests.Jane:Treescanalsostopthewaterfromwashingtheearthaway.Maria:Cuttingdownthetreesaffectstheweathersomuch.Kangkang:Yes.Itisharmfultohumanbeings,animalsandplants.Althoughthereweresandstormsbefore,nowwehavebuilt“TheGreenGreatWall”.Ourenvironmenthasbecomemuchbetter.LeadinWatchandThink*Howisthemanfeelingnow?--Why?--Becausethereisa.sandstormsandstormLeadin1b

Listento1aandchoosethebestanswer.Theboyandgirlsaretalkingabout_______.differenttypesofsandstormsthereasonsforsandstormssandstormsindifferentcitiesFocusonthemainideaoftheconversationwhenyoulistenforthefirsttime.√Afterlisteningandanswerthequestions.1.Whatwastheweatherlikebefore?Thereweresandstormsbefore.2.Whatcausesthesesandstorms?

Peoplecutdowntoomanytrees.Asaresult,alotofrichlandchangedintodesert.3.Whathavewedonetoprotecttheenvironment?Wehavebuilt“TheGreenGreatWall”.Waterwashedtheearthaway.吹走

blow...away吹走LeadinSoalotofrichlandchangedinto

desert.changeinto

轉化成richlandAsaresult,...Leadin1cRead1aandcompletetrees’functions.

Trees’functions

A.

B.Alotofwatercanbesavedbyforests.C.

Treescanstopthewindfromblowingtheearthaway.Theycanalsostopthewaterfromwashingtheearthaway.Keypoints

earth著重指與天空相對的“土地”，還泛指泥土；soil主要指用于種植莊稼的“土壤”；ground主要指大地表面；land著重指與河、湖、海洋相對應的陸地。eg:Putthetreeintheholeandfillitwithearthagain.把樹放進坑里，然后用土壤重新把坑填滿。Fishcannotliveonland.魚不能在陸地上生活。Thelittleboywaslyingontheground。小男孩躺在地上。KeypointsAlthoughthereweresandstormsbefore,nowwehavebuilt“TheGreatWall”.雖然之前有沙塵暴，但現(xiàn)在我們已經建起了“綠色長城”，although

conj.雖然，盡管，引導讓步狀語從句，相當于though,只是although比though更為正式。eg:Though/Althoughitwasraining,wewentthere.雖然下著雨，但我們還是去了那兒。Keypoints注意：在句中使用although或though時，不能與but同時使用,但although/though后可用yet或still等。加強語氣時，通常說eventhough，而不能說evenalthough。eg:Althoughthequestionisdifficult,hecanstillanswerit.盡管這個問題很難，他仍然能回答。前幾年

沿著街道走

砍伐結果阻止...干某事沖走刮走

對...有害Readthepassageandfindtheusefulphrases.thelastfewyearswalkalongthestreetcutdownasaresultstop/prevent/keep...fromdoingsth.wash...awayblow...awaybeharmfulto...=doharmto...thelastfewyearsasaresultblow...awaywash...awaycutdownbeharmfulto=doharmtostop/prevent/keep...fromdoingsthwalkalongthestreetActivity2:單詞閃現(xiàn)，快讀快譯。單詞閃現(xiàn)，快讀快譯。沙塵暴的形成及危害Let'sseewhathappenedtoourearth!sandstorm4A.Listentothepassageandcirclethephrasesyouhear.

becomeweaker

destroytheenvironmentdisappearrapidly

ontheearthenoughbambootoeat4B.Listenagainandfillintheblanks.1.Nowsomekindsofanimalsarebecoming___________________.2.Someanimalsare_______________dyingoutcompletely.3.Inthepast,pandaslivedaquietlifeandhad

______________food.4.Humanshave____________________theimportanceofprotectinganimals.5.Weshould________________toprotectthem.doourbestindangerofplentyofcometounderstandfewerandfewerListentothetapeandnumberthepictures.DECBAParticipatoryLearningReadthetapeandfinishthethinkingmap.Treescanstopthewindfromblowingtheearthaway.stopthewaterfromwashingtheearthaway.savealotofwaterTestforgoals用不定代詞或不定副詞填空。1.Doyouhave____questions?2.Maybe_____________________putmydictionary____________.Ican’tfindit_________．3.I’msothirsty.Shallweget___________todrink?4.There’s__________inthenewbox.It’semptynow.5.__________istoodifficultifyouputyourheartintoit.6.Ithinkyoucanfindhim____________intheschool.7.______ofusknowtheanswertothequestion.8.Couldyoutell____________differentbetweenthetwopictures?9.Pleasehelpyourselfto_________soup.anysomeone/somebodysomewhereanywheresomethingnothingsomewhereNothingNonesomethingsomeRetellthetrees`functionstoyourpartneraccordingtothethinkingmap.Youcandoitlikethis:Treescanstop....Treesalsocansave....What`smore,treescanprevent....Readthetapeagainandanswerthefollowingquestions.1.Whatwastheweatherlikebefore?2.Whywastheweathersobad?3.Howdoescuttingdowntreesdoharmtous?4.Howisthesituationnow?Thereweresandstorms.Whenpeoplewerewakingalongthestreet,theycouldn`tseeanything.Peoplecutdowntoomanytrees.Asaresult,alotofrichlandchangedintodesert.Itcanaffecttheweatherandisharmfulto

humanbeings,animalsandplants.Wehavebuilt“TheGreenGreatWall”.Ourenvironmenthasbecomemuchbetter.Welearn:1.Somewords:sand,although

2.Somephrases:changeinto,humanbeing

3.Somesentences:

(1)Asaresult,alotofrichlandhaschanged

intodesert.

(2)Treescanstopthewindfromblowing