仁愛英語九年級(jí)上Unit2Topic2Section-A

SectionA

Alltheseproblemsareveryserious.Unit2Topic21編輯課件學(xué)習(xí)目標(biāo)：1、熟記新單詞，學(xué)會(huì)運(yùn)用新短語；2、學(xué)習(xí)不定代詞和不定副詞。情感目標(biāo)：了解沙塵暴的形成及其危害，認(rèn)識(shí)樹木的重要性，提高環(huán)保意識(shí)。Review:Readthenewwordsandreviewthepollutionaroundus.2編輯課件waterpollution3編輯課件noisepollution4編輯課件airpollution5編輯課件soilpollution6編輯課件lightpollution7編輯課件litter8編輯課件forestLeadin

9編輯課件Whathappenedtotheforest?Peoplehavecutdowntoomanytrees.Theforesthasgone.10編輯課件What’sworse,theforesthaschangedinto

desert.n.沙漠v.舍棄、遺棄11編輯課件The

wind

isblowingstronglywithlotsofsand,

wecallitsandstorm.n.沙n.沙塵暴12編輯課件Washtheearthawaymanytrees

changeintodesertforestgone

sandstormscomeintobeing

cutdowntrees(4)(1)(5)(3)(6)(2)思考：Howdoesthesandstormcomeintobeing?形成、產(chǎn)生13編輯課件Self–study：（小組討論，完成自主學(xué)習(xí)）1、Enjoytheflash35-1a.swfandchoosethebestanswer.2、Changethewordintocorrectforms.3、Readthedialog,underlinethephrasesandtranslatethem.14編輯課件1、Theboyandgirlsaretalkingabout_____B2、【詞形變換】變?yōu)槊~：pollute_________變反義詞：outside_________變同義詞：prevent_________；though__________；rubbish_________pollutioninsidestopalthoughlitter展示：Showmeyouranswers.15編輯課件3、短語翻譯1.剛才_(tái)________2.不能看見任何東西____________3.砍伐太多的樹木_______________4.結(jié)果______5.大量富饒的土地_______________6.變成__________________7.阻止大風(fēng)刮走泥土____________________________8.阻止流水沖走泥土____________________________9.對(duì)……有害__________________________10.人類_____________________justnowcan’tseeanythingcutdowntoomanytreesbeharmfultostopthewindfromblowingtheearthawaychange…into…asaresultjustnowstopthewaterfromwashingtheearthawayhumanbeing16編輯課件Treescanstopthewindfromblowingtheearthaway.

Treescanalsostopthewaterfromwashingtheearthaway.

17編輯課件Read1aandcompletetrees’functionsB、AlotofwatercanbesavedbyforestsA、Treescanstopthewindfromblowingtheearthaway.

C、Treescanalsostopthewaterfromwashingtheearthaway.18編輯課件Group–work：（小組討論，分析以下句子，并總結(jié)短語的用法）展示學(xué)生成果：（叫同學(xué)講解并用投影儀展示討論結(jié)果）19編輯課件2、Asaresult,alotofrichlandhaschangedintodesert.

結(jié)果，許多肥沃的土地已經(jīng)變成了沙漠。點(diǎn)撥：a)change…into…（把…變成…）=turn…into…把…..(轉(zhuǎn))變成…..e.g：PleasechangeEnglishintoChinese.請(qǐng)把英語變成漢語。練習(xí)：我們可以把冰變成水。Wecan_______ice_____water.1、Whatbadweather!點(diǎn)撥：What引導(dǎo)的感嘆句---a.What+形容詞+不可數(shù)名詞/可數(shù)名詞復(fù)數(shù)！（不可數(shù)名詞如:news;advice;weather;water）b.What+a/an+形容詞+可數(shù)名詞單數(shù)！練習(xí)：1）多么繁忙的一天呀！________________2)多么清澈的水呀！________________重點(diǎn)講評(píng)Whatabusyday!Whatcleanwater!changewater20編輯課件3、Treescanstopthewindfromblowingtheearthaway.樹可以防止大風(fēng)刮走泥土。Treescanalsostopthewaterfromwashingtheearthaway.也可防止流水沖走泥土點(diǎn)撥：stopsb./sth.(from)doingsth.=preventsb./sth.(from)doingsth.---阻止…做某事鏈接：同義詞組

keepsb./sth.fromdoingsth.---阻止…做某事（from不能省略）練習(xí)：大雨使我們無法外出。Theheavyrain

us

goingout..=________________________________=_________________________________stopsTheheavyrainpreventsusformgoingout.Theheavyrainkeepsusformgoingoutform21編輯課件4、Cuttingdowntreesisharmfultohumanbeings,animalsandplants.譯：_______________________________思考：cuttingdowntrees是_________短語在句子中作______語，謂語用______數(shù)。練習(xí)：閱讀是我的愛好。

myhobby.5、不定代詞和不定副詞

(一)不定代詞：指人：someone/somebodyanyone/anybodynoone/nobodyeveryone/everybody指/：somethinganythingnothingeverything（二）不定副詞：somewhereanywherenowhereever動(dòng)詞單主Readingis砍伐樹木對(duì)人類、動(dòng)物和植物有害。22編輯課件()1.Weshould

humans

destroyingtheenvironment.A.keep.byB.stop.toC.prevent.byD.stop.from()2.Ihavetowaitforthetrafficlightsto

green.ThenIcangoonwalking.A.changeB.changedC.changetoD.changinginto()3.Theheavyrain

usfromfinishingthework.A.protected.B.preventedC.movedD.made()4.Thedriverwasbadlyhurt_____ofthetrafficaccident.A.ataresultB.intheresultC.withtheresultD.asaresult()5.alwayshelpsothers_____sheisverybusy.A.but B.and C.although D.because()6.Wemustplantmoretreesafterwe_____everyyear.A.cutoffthem