Unit2Topic2SectionA课件仁爱科普版英语九年级上册

Unit2SavingtheEarthTopic2Alltheseproblemsareveryserious.SectionA掌握重点词汇和短语：sand,although,sandstorm,desert,humanbeing,reduce,completely,changeinto,stop…from,blow/wash…away,asaresult等。2.能听懂谈论沙尘暴成因的对话。能够从所听材料中获得有效的细节信息。3.掌握动名词做主语，“防止...做...”的几种表达。

4.通过课文的学习，让学生了解沙尘暴形成的原因和过程，关注全球的环境问题。Learningaims:SandstormWhichdisastercanyouseeinthevideo?Doyouknowhowsandstormscomeintobeing?3washtheearthawaymanytreeschangeintodesertforestsgonesandstormscomeintobeingcutdowntreesPre-listeningTheforestshavegoneandtherainwashesthe

earth

away.Thenthereisasandstorm.washaway把...冲走sandstorm['sændstɔ:m]n.沙尘暴拓展：blowaway把...吹走rainstorm暴风雨snowstorm暴风雪Thislandhaschangedintodesertbecausepeoplehavecutdowntoomanytreesonit.desert//dɪ'zət/n.沙漠/dɪ'zɜ:t/

v.舍弃，遗弃区分：dessert[dɪˈzɜːrt]n.甜点

Newwords

1.sand[sænd]n.沙2.sandstorm[ˈsændstɔ:m]n.沙暴3.changeinto

转换成，变成（turninto)4.desert[ˈdezət]n.沙漠v.

舍弃，遗弃5.humanbeing人6.although[ɔ:lˈðəu]conj.虽然，尽管，即使7.reduce[rɪˈdju:s]v.减少，减轻沙暴人转换成减少彻底的沙漠虽然沙子While-listening1bFocusonthemainideaoftheconversationwhenyoulistenforthefirsttime.Theboyandgirlsaretalkingabout

.differenttypesofsandstormsthereasonsforsandstormssandstormsindifferentcitiesListento1aandchoosethebestanswer.1cRead1aandcompletetrees’functions.Tree’sfunctions

________________________________Alotofwatercanbesavedbyforests.________________________________Treescanstopthewindfromblowingtheearthaway.Theycanalsostopthewaterfrom

washingtheearthaway.教考衔接1.Whatistheweatherlike?It’s_______.Thewindisblowingstrongly.2.Whatcausesthesesandstorms?Peoplehave____________toomanytrees.3.Howcantreesaffecttheweather?(1)Treescan_____thewind_____blowingtheearthaway.(2)Alotofwatercan___________byforests.(3)Treescanpreventthewaterfrom______theearth______.badcutdownstopfrombesavedwashingawayListento1aagainandfillinthetable.Groupwork.Read1aandfindthephrases.3.变成changeinto=turninto4.阻止某人做某事stopsb.fromdoingsth1.砍到

5.吹...走6.冲走7.许多

8.形成、开始、产生cutdownblowawaywashawayanumberof...comeintobeing2.结果asaresult10.灭绝、消失dieout9.处于...的危险indangerof12.尽某人最大努力做某事tryone’sbesttodosth11.大量plentyLook,listenandsay.1aWhatastrongwind!(Kangkang,MariaandJanearetalkinginaroom.Thewindoutsideisblowingstrongly.)Yes.Butit’sbetterthanthelastfewyears.Thereweresandstormsbefore.WhileIwaswalkingdownthestreet,Icouldn’tseeanything.

Thesandreallyhurtmyface.Whywastheweathersobad?Peoplecutdowntoomanytrees.Asaresult,alotofrichlandchangedintodesert.Treescanstopthewindfromblowingtheearthaway.a.What+形容词+不可数名词/可数名词复数！

b.What+a/an+形容词+可数名词单数！

asaresult结果是asaresultof由于changeinto转换成、变成

cutdown意为“砍倒、削减”考点1拓展cutup

意为“切碎”cutoff意为“切断、中断”cutout意为“删除、删去、剪下”cutin意为“插嘴”考点2stopsb/sth(from)doingsth意为“阻止某人/某物做某事”=prevent/discouragesb/sth(from)doingsth拓展keepsb/sthfromdoingsth意为“阻止某人/某物做某事”from不能省略。keepsb/sthdoingsth意为“使某人/某物一直做某事”Andalotofwatercanbesavedbyforests.Treescanalsostopthewaterfromwashingtheearthaway.Cuttingdowntreesaffectstheweathersomuch.Yes.Itisharmfultohumanbeings,animalsandplants.Althoughthereweresandstormsbefore,nowwehavebuilt“TheGreenGreatWall”.Ourenvironmenthasbecomemuchbetter.takeaway“拿走”putaway“把...收起来”throwaway“扔掉”

besavedby被...所保存被动语态，结构为be+done+by

cuttingdown动名词做主语，谓语动词用单数

although=though=eventhough虽然，尽管。不与but,however连用，但常与yet,still连用。

Post-listening2Completethesentenceswiththecorrectformsofthegivenphrases

inthebox.asaresult,changeinto,dosomething,stop…from,blow…away

1.Peoplehavecutdownsuchalargenumberof

treesthattheland

_________________desert.2.Therearefewertreesleft,sothewindalways_______theearth________.3.Airpollutionhasbecomeaseriousproblem,sowemust______________toreduceit.4.weshouldtryourbestto______people______cuttingdownthetrees.5.Inthefuture,humanbeingscanprotectthetreeswell._____________,animalswillliveahappylifeintheforest.

haschangedintoblowsawaydosomethingstopfromAsaresult4A.Listentothepassageandcirclethephrasesyouhear.becomeweaker

destroytheenvironmentdisappearrapidly

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

______________food.4.Humanshave________________________

theimportanceofprotectinganimals.5.Weshould______________toprotectthem.doourbestindangerofplentyofcometounderstandfewerandfewer考点1anumberof意为“许多、大量”=some

后面接名词复数或集合名词，谓语动词用复数。

alagrenumberof

许多、大量

asmallnumberof

少量区别thenumberof意为“...的数量、数目”

后面接名词复数谓语动词用单数。

用what’s来提问，用large/small来修饰。考点2dieout意为“灭绝、灭亡、逐渐消失”拓展dieoff意为“相继死去”diefrom意为“因（受伤、意外事故等外部原因）而死亡”dieof意为“因（疾病、饥饿、情感等内部原因）而死亡”dieaway意为“（声音等）逐渐减弱”Exercises用所给词汇的适当形式或根据汉语提示填空。1.Thenameofthelittle__________isTim.Itwas________in2023inRussia.(bear)2.Mypetcatis_________outbecauseofsomediseases.The________ofitwillmakemeverysad.(die)3.Pleasebe_________whentaking_______ofthelittlegirl.(care)4.TheChinesedishesinthisrestaurantsmells__________andsells________.(good)5.Some__________animalssuchassnakesarealsoin_________.(danger)6.Ihaveforgottenthenameofthemovie___________(complete).bearborndyingdeathcarefulcaregoodwelldangerousdangercompletely课后实践作业小组调查分组调查我们所学的灾害，完成一篇调查短文，每组派代表进行全班展示。注