人教版 (2019)Unit 3 Environmental Protection评课ppt课件

这是一份人教版 (2019)Unit 3 Environmental Protection评课ppt课件，共60页。PPT课件主要包含了词 汇 认 知，阅 读 自 测，词 汇 精 讲，句 型 剖 析等内容，欢迎下载使用。

重点单词1.　release　 vt.& n.排放;释放;发布 2.　cmprehensive　 adj.全部的;所有的;详尽的 3.　trend　 n.趋势;趋向;动向 4.　bradcast　 vt.& vi.播送;广播;传播　 n.广播节目;电视节目 5.　plicy　 n.政策;方针;原则 6.　seize　 vt.抓住;夺取;控制 
词汇拓展1.starve vi.& vt.(使)挨饿;饿死→　starvatin　 n.挨饿;饥饿;饿死 2.eclgy n.生态;生态学→　eclgical　 adj.生态的;生态学的 3.habitable adj.适合居住的→　habitat　 n.(动植物的)生活环境;栖息地 4.sustain vt.维持;遭受;承受住→　sustainable　 adj.可持续的;合理利用的 
5.frequently adv.频繁地;经常→　frequent　 adj.频繁的;经常的 6.restrict vt.限制;限定;束缚→　restrictin　 n.限制规定;限制法规;约束 
重点短语1.　carbn　 dixide 二氧化碳 2.fssil 　fuel　 化石燃料(如煤或石油) 3.have a(n)...　impact　 n... 对……有……影响;对……产生……影响 4.result 　in　 造成;导致 5.cnsider 　ding　 sth 考虑做某事 
Step 1　Fast Reading一、快速浏览课文,将段落与其主旨大意相匹配1.Paragraph 1　A.It is a fact that Earth is getting warmer and 2B.The rise in temperature has brught great 3C.What shuld be dne t reduce greenhuse gas 4D.The “man-made” greenhuse effect is respnsible fr the rise in 5E.The pht f a dead plar bear shwed the impact f the rise in temperature n Earth’s eclgy.
Step 2　Detailed Reading二、仔细阅读课文,选择最佳答案1.Why were the remains f the dead plar bear nly “skin and bnes”?A.It died f died many years had eaten up its high temperature had rtten it.
2.What causes Earth’s surface temperature t rise quickly?A.The warming “man-made” greenhuse rising sea “natural” greenhuse effect.
3.What des the rise in temperature result in?A.The greenhuse high sea-ice extinctin f plar increase in extreme weather and natural disasters wrldwide.
4.What can yu d t help reduce greenhuse gas emissins?A.Burn fssil fd t plar the amunt f carbn dixide ur lifestyles the “natual” greenhuse effect.
1.【教材原文】An expert wh has studied plar bears fr many years said that frm the psitin f its dead bdy,the bear appeared t have starved and died.(page 26)一名研究北极熊多年的专家说,从其尸体的位置来看,北极熊似乎已经饿死了。考点starve vi.& vt.(使)挨饿;饿死starvatin n.挨饿;饥饿;饿死starve fr极其需要;渴望
语境领悟(1)Thse animals wuld starve if fd was difficult t find.如果很难找到食物,那些动物就会挨饿。(2)That yung man wuld rather starve than give way.那个年轻人宁愿饿死也不妥协。(3)She’s starving herself,trying t lse weight.她试图通过节食来减肥。(4)The lnely man starved fr cmpaninship.这个孤独的人渴望有人陪伴。
学以致用单句语法填空(1)It is silly 　t starve　(starve) yurself t be skinny. (2)I am starving 　fr　 a sight f the sea. 完成句子(3)由于没有食品,那里的人们在挨饿。Because there is n fd,　peple　 　there　 　are　 　starving　. (4)敌人想把我们饿出来。The enemy is trying t　starve　 　us　 　ut　. 
2.【教材原文】This alarming case shwed hw the increase in temperature had an impact n Earth’s eclgy.(page 26)这一令人震惊的案例显示了温度升高是如何对地球生态产生影响的。
考点 have an impact n... 对……有影响;对……产生影响,n也可以用upn替换have/make a strng impact n 对……有强烈的影响have/make a great/huge/full impact n 对……有巨大的/全面的影响have/make a deep/prfund impact n 对……有深远的影响have/make a direct impact n 对……有直接影响have/make a marked impact n 对……有显著的影响have/make a bad impact n 对……有不良影响have/make little impact n 对……几乎没有影响have/make n impact n 对……没有影响
语境领悟(1)The cmputer has made a great impact n mdern life.计算机对现代生活产生了巨大的影响。(2)My father has a deep impact n me.我父亲对我影响很深。(3)The meeting will have a marked impact n the future f the cuntry.这次会议将对国家的未来产生显著的影响。(4)His absence made little impact n ur prgress.他的缺席对我们的进程没有多少影响。
学以致用单句语法填空(1)A parent-teacher cnference can have 　a　 huge impact n a student’s wrk and behaviur. (2)Few writers have had such an impact 　n/upn　 the thinking f the mdern wrld as British writer Gerge Orwell. 
完成句子(3)她的讲话会对每个人都有深远的影响。Her speech will 　have/make　 　a　 　deep/prfund　 　impact　 　n/upn　 everyne. (4)吸烟对他的健康有不良影响。Smking 　has/makes　 　a　 　bad　 　impact　 　n/upn　 his health. 
3.【教材原文】The heat is released back int space at lnger wave lengths.(page 27)热量以较长的波长释放回太空。考点release vt.& n.排放;释放;发布
语境领悟(1)The gvernment is trying t frbid the factries t release t much carbn dixide int the atmsphere.政府正试图禁止工厂向大气中排放过多的二氧化碳。(2)It tk the firefighters half an hur t release the driver frm the damaged car.消防队员花了半个小时才把司机从被损坏的汽车里救出来。
(3)He is expected t be released frm hspital tday.他有望今天出院。(4)He is releasing an album f lve sngs.他即将推出一张情歌专辑。(5)The accident caused the release f a radiactive substance int the atmsphere.这次事故导致一种放射性物质泄漏到大气中。
(6)He called fr the immediate release f all plitical prisners.他要求立即释放所有的政治犯。(7)The latest Disney film ges n general release next mnth.迪斯尼公司制作的最新一部电影将在下个月公开上映。
学以致用单句语法填空(1)Ten thusand ballns 　were released　(release) at the ceremny yesterday. 
完成句子(2)三年以后,那个人被释放出狱。Three years later,the man　was　 　released　 　frm　 　prisn　. (3)该乐队的最新专辑将在下周发行。The band’s latest album　will　 　be　 　released　 next week. 
4.【教材原文】Climate scientists have warned that if we d nt take apprpriate actins,this warming trend will prbably cntinue and there will be a higher price t pay.(page 27)气候科学家曾经警告说,如果我们不采取适当的行动,这一变暖趋势可能会继续下去,将付出更高的代价。考点trend n.趋势;趋向;动向
语境领悟(1)The trend f prices is still upward.物价仍有上涨的趋势。(2)The event changed the trend f public pinin.这件事改变了舆论的趋向。(3)This trend is ging in the ppsite directin.这种动向正在向相反的方向转变。
学以致用完成句子(1)年轻人中有一种兼职就业的趋势。　There　 　is　 　a　 　trend　 twards part-time emplyment amng yung peple. (2)提早退休者有增加的趋势。There is 　a　 　grwing　 　trend　 twards earlier retirement. 
(3)年轻人喜好追求最新的流行款式。The yuth like t fllw 　the　 　latest　 　trends　 in fashin. 
5.【教材原文】In fact,news reprts are frequently bradcast abut extreme rainstrms and heatwaves causing deaths and ecnmic lsses.(page 27)事实上,有关极端暴风雨和热浪造成死亡和经济损失的新闻报道经常播出。考点bradcast vt.& vi.(bradcast,bradcast) 播送;广播;传播　n.广播节目;电视节目
语境领悟(1)The cncert will be bradcast live tmrrw evening.明晚的音乐会将现场直播。(2)The radi bradcast the news in detail.广播电台详细地广播了那则消息。(3)She likes t bradcast gssip.她喜欢传播流言蜚语。(4)Sme statins bradcast 24 hurs f the day.有些电台一天24小时广播。
(5)That internatinal bradcasting crpratin bradcasts all ver the wrld.那家国际广播公司向全世界播送节目。(6)We watched a live bradcast f the speech.我们观看了那场演说的现场直播。
学以致用单句语法填空(1)The newly-elected president 　bradcast　(bradcast) n current affairs last week. (2)The chairman’s speech will 　be bradcast　(bradcast) natinwide. 
完成句子(3)这家广播电台将在10点钟广播这条消息。The radi statin will 　bradcast　 　the　 　news　 at 10 ’clck. (4)昨晚广播了一条特别消息。A special message 　was　 　bradcast　 　yesterday　 　evening　. (5)他将这个秘密传遍了全校。He 　bradcast　 　the　 　secret　 　t　 the whle schl. 
(6)每晚10:00她收听英语广播。She 　listens　 　t　 　the　 　English　 　bradcast　 at 10:00 every night. 
6.【教材原文】Cntinued greenhuse gas emissins will result in further warming and lng-lasting changes t the glbal climate.(page 27)持续的温室气体排放将导致全球气候进一步变暖和长期变化。考点result in造成;导致(1)result in相当于cause或lead t,句子的主语是因,in的宾语是果(2)result frm意为“(因……)发生;(随……)产生”,句子的主语是果,frm的宾语是因
语境领悟(1)His careless speech resulted in much argument.他的发言过于草率,因而引来许多争议。(2)The terrible accident resulted in the death f tw passengers.那桩可怕的意外事故造成两名乘客死亡。(3)The terrible accident resulted frm his carelessness.那桩可怕的意外事故是因为他的疏忽大意导致的。
学以致用句型转换(1)Success results frm hard wrk.→　Hard　 　wrk　 results in 　success　. (2)The strike resulted in the cnfusin.→The cnfusin 　resulted　 　frm　 the strike. (3)Smking can cause lung cancer.→Smking can 　lead　 　t　/　result　 　in　 lung cancer. 
完成句子(4)50%的道路交通事故都会导致头部损伤。Fifty percent f rad accidents 　result　 in　/　lead 　t　 head injuries. (5)恶劣的天气导致了该起交通阻塞。The bad weather 　resulted　 　in　/　led　 　t　 the traffic jam. (6)他考试不及格是由他的懒惰造成的。His failure in the exam 　resulted　 　frm　 his laziness.
7.【教材原文】Gvernments need t cnsider making plicies and taking apprpriate actins and measures t reduce greenhuse gas emissins.(page 27)政府需要考虑制定政策并采取适当的行动和措施来减少温室气体的排放。考点cnsider考虑;细想;认为cnsider ding sth 考虑做某事cnsider +n./adj./that/when...考虑……cnsider...(as/t be)...把……看作……;认为……是……
语境领悟(1)I’m cnsidering changing my jb.我正在考虑换换工作。(2)Please cnsider my suggestin.请考虑我的建议。(3)He cnsidered that he had nt been well-treated by us.他认为我们没有善待他。(4)I’m cnsidering when we shall start.我正在考虑我们什么时候开始。
(5)He cnsiders me (as/t be) his best friend.他把我看作他最好的朋友。(6)They cnsider me the mst imprtant persn in the family.他们把我看作家庭中最重要的人。
温馨提示cnsider后面直接接动词的非谓语形式时,只能接动词-ing形式,不能接动词不定式;接宾语再接非谓语形式时,要接动词不定式。
学以致用单句语法填空(1)Have yu cnsidered 　asking　(ask) him fr help? (2)Yu surely can’t cnsider him 　t be　(be) a selfish man. (3)Wh is generally cnsidered 　t have invented　(invent) the first cmputer? (4)I cnsidered Rse 　as　 a gd assistant. 
完成句子(5)你考虑过坐小船到那里去吗?Have yu cnsidered 　ging　 there　 by　 bat　?(6)他们认为那所房子很好。They cnsidered the huse 　t　 　be 　very gd. 
8.【教材原文】We as individuals can als reduce ur “carbn ftprint” by restricting the amunt f carbn dixide ur lifestyles prduce.(page 27)作为个体,我们也可以通过限制我们的生活方式产生的二氧化碳的数量来减少我们的“碳足迹”。考点restrict vt.限制;限定;束缚把……限制/限定/约束在……be restricted t限于
语境领悟(1)Dense fg severely restricted visibility.浓雾严重影响了能见度。(2)He feels this new law will restrict his freedm.他觉得这项新法规会限制他的自由。(3)He restricted himself t tw cigarettes a day.他约束自己每天只抽两支烟。(4)The reprts are restricted t descriptins and give n pinins abut the facts.那些报道只限于描述事实,而不加以任何评论。
学以致用单句语法填空(1)Access t the club 　is restricted　(restrict) t members nly. (2)The hspital may restrict bkings 　t　 peple living lcally. 
完成句子(3)我限制自己每天只喝一杯咖啡。I 　restrict　 　myself　 　t　 ne cup f cffee a day. (4)在城里车速不得超过每小时30千米。Speed 　is　 　restricted　 　t　 30 kmph in twns. 
1.【教材原文】There is little dubt that Earth is getting warmer and warmer (see the graph).(page 26)毫无疑问,地球正变得越来越暖和(如图)。句法分析There is little/n dubt that...意为“毫无疑问……;毫不怀疑……”,其中that引导的是同位语从句,说明dubt的内容。that引导同位语从句时,只起连接作用,本身无意义,也不做成分。
语境领悟(1)There is little dubt that they will cme tmrrw.毫无疑问明天他们要来。(2)There was n dubt that smene had brken int his rm.毫不怀疑有人闯入过他的房间。(3)There can be n dubt that vegetables are gd fr ur health.毫无疑问蔬菜对我们的健康有好处。
温馨提示dubt还可用作动词,既可做及物动词,也可做不及物动词,意为“怀疑;不相信”。在肯定句中dubt后面的宾语从句由whether/if 等引导;在疑问句和否定句中dubt后面的宾语从句由that引导。 We have never dubted f the success f ur experiment. 我们的实验会成功,对于这一点我从未怀疑过。
She dubts whether she will be successful. 她怀疑她能否成功。 We dn’t dubt that the truth will cme ut. 我们相信真相会大白的。
学以致用单句语法填空(1)Sme researchers believe that there is n dubt 　that　 a cure fr that disease can be fund. (2)　There　 is n dubt that the amber rm was lst in Wrld War Ⅱ. (3)There is sme dubt 　whether/if　 she will be able t repay the mney n time. 
句型转换(4)It’s certain that he will cme t my birthday party.→　There　 　is　 　little/n　 　dubt　 that he will cme t my birthday party. (5)He is sure t succeed.→There is n dubt that 　he　 　will　 　succeed　. 
2.【教材原文】The “natural” greenhuse effect refers t the fact that heat frm the sun enters the atmsphere and warms Earth’s surface as shrt-wave radiatin.(pages 26-27)“自然的”温室效应是指太阳的热量以短波辐射的形式进入大气层并使地球表面变暖。
句法分析the fact后面为that引导的同位语从句,说明fact的内容。that引导同位语从句时,只起连接作用,本身无意义,也不做成分。
语境领悟(1)She went t Spain despite the fact that the dctr had tld her t rest.尽管医生曾告诉她应该休息,但她还是去了西班牙。(2)Yur failure in the final exam lies in the fact that yu didn’t attach enugh imprtance t yur English.你期末考试没及格的原因在于没有给予英语足够的重视。
(3)The fact that he has nt been seen recently disturbs everyne in his ffice.近来谁也没有见过他,这一事实令他办公室里所有的人不安。
学以致用单句语法填空(1)He is nt aware f 　the　 fact that there are still many pr peple in the wrld wh have nt enugh t eat. (2)The fact 　that　 he had nt said anything at the meeting surprised everyne. 
完成句子(3)如果不是因为她不会唱歌,我会邀请她参加聚会。If it were nt fr the fact 　that　 she　 can’t　 sing　, I wuld invite her t the party. (4)在那个地区人口仍在增长是一个事实。　It　 　is　 　a　 　fact　 　that　the ppulatin is still increasing in that area. 
3.【教材原文】Greenhuse gases in the atmsphere,such as methane and carbn dixide,trap sme f the heat,keeping Earth’s climate warm and habitable.(page 27)大气中的温室气体,如甲烷和二氧化碳,捕获了部分热量,使地球的气候变得温暖并适宜居住。句法分析keeping Earth’s climate warm and habitable为动词-ing形式短语做状语表示结果。动词-ing形式做结果状语时通常放在句子后面。
语境领悟(1)He drpped the glass,breaking it int pieces.他把玻璃杯掉下去,使它摔成了碎片。(2)Her husband died ten years ag,leaving her with three children t lk after.她丈夫十年前去世了,撇下她和三个需要照顾的孩子。
(3)I thught he was making fun f me,and ran faster than ever,reaching the schl yard quite ut f breath.我想他在拿我开玩笑,就越发跑得比以往更快了,到达校园时已经上气不接下气。
温馨提示动词-ing形式做结果状语与动词不定式做结果状语 动词-ing形式做结果状语,多表示一种“自然而然、顺理成章”的结果;动词不定式也可以做结果状语,多表示出乎意料的结果。 It rained heavily,causing severe flding in that regin. 雨下得太大了,导致那个地区洪水泛滥。 He cut ff the electricity quickly,preventing an accident.
他迅速切断了电源,防止了一起意外事故。 I hurried there t find that all f them had gne. 我匆匆赶到那里,结果发现他们都走了。 I visited him nly t find him ut. 我去看他,结果却发现他出去了。
学以致用单句语法填空(1)The alarm clck indicating it was time fr me t get up went ff,　interrupting　(interrupt) my gd dream. (2)The glass drs have taken the place f the wden nes at the entrance,　letting　(let) in the natural light during the day. (3)He ran t the statin nly 　t find　(find) the train had left. 
完成句子(4)一架小型飞机坠毁在城东5千米处的山坡上,机上4人全部遇难。A small plane crashed int a hillside five kilmetres east f the city,　killing　 　all　 　fur　 　peple　 n bard. (5)有许多国家踢足球,这使得它成为世界上最流行的体育运动之一。Ftball is played in many cuntries,　making　 　it　 　ne　 　f　 　the　 　mst　 　ppular　 　sprts　 in the wrld. 
4.【教材原文】Withut this prcess,Earth culd nt sustain life.(page 27)没有这个过程,地球就无法维持生命。句法分析withut意为“没有;缺乏”,该句为双重否定句。双重否定常表示肯定意义,意为“没……就不……;只有……才;每……无不……;每……必定……”。
语境领悟(1)There’s n smke withut fire.无风不起浪。(2)He can’t speak English withut making mistakes.他一说英语就出错。(3)I never see him withut feeling like crying.我每次见到他就想哭。(4)Withut yur help,I culdn’t have finished the task s early.要不是你帮忙,我不会这么早就完成任务的。
温馨提示在双重否定句中,withut常常表示的是条件,相当于一个否定的if从句。 He can’t see anything withut glasses/if he desn’t wear glasses. 不戴眼镜他什么都看不见。
学以致用单句语法填空(1)I can’t g t sleep 　withut　 a nvel in hand in the evening. (2)I wn’t g t the party withut 　being invited　(invite). 
句型转换(3)If it were nt fr my help,yu culd nt manage.→　Withut　 　my　 　help　,yu culd nt manage. (4)We can’t live withut water.→We can’t live 　if　 there　 is　 n　 water　.
5.【教材原文】It is ur respnsibility t seize every pprtunity t educate everyne abut glbal warming,alng with its causes and impacts,because this is the mst serius issue affecting all f us n this planet.(page 27)我们有责任抓住每一个机会,教育每个人了解全球变暖及其原因和影响,因为这是影响我们地球上所有人的最严重的问题。
句法分析It is ur respnsibility t seize...中的It为形式主语,真正的主语为后面的动词不定式短语。在英语句子中,如果主语部分较长,为使句子保持平衡,避免头重脚轻,常采用形式主语it使句子更加协调。
语境领悟(1)It was a great pleasure t see yu.见到你真高兴。(2)It is imprtant fr yu t learn English well.你们学好英语很重要。(3)It usually takes me an hur t finish my hmewrk every day.每天做作业通常花费我一个小时的时间。
温馨提示形式主语it除代替不定式短语做主语外,还常代替主语从句做主语,有时也代替动词-ing形式短语做主语。 It was clear that he didn’t agree with us. 很显然他不同意我们的观点。 It’s a pity that yu didn’t cme yesterday. 昨天你没来真遗憾。
It is said that the meeting will nt be held. 据说会议不开了。 It’s a waste f time arguing with him. 和他争论是浪费时间。
学以致用单句语法填空(1)In fact 　it　 is a hard jb fr the plice t keep rder in an imprtant ftball match. (2)It’s imprtant fr us 　t learn　(learn) the cmputer skills. 
完成句子(3)今天把这项工作做完是不可能的。　It　 　is　 　impssible　 t finish the wrk tday. (4)掌握一门外语不是件容易的事。It is nt an easy thing 　t　 　master　 　a　 　freign　 　language　. 
一、单词拼写1.He 　frequently　(经常) cmes t visit me. 2.Sft drinks cntain 　carbn　(碳) dixide. 3.The 　bradcast　(广播节目) was recrded,nt live. 4.Yu wuld 　starve　(挨饿) if yu dn’t wrk. 5.Fssil 　fuels　(燃料) can be used up ne day. 6.T keep 　eclgy　(生态) in balance is ur duty. 7.They had sufficient fd t 　sustain　(维持) life. 
8.She has a 　cmprehensive　(全面的) grasp f the subject. 9.　Seize　(抓住) the chance,therwise yu’ll regret it. 10.Having small children tends t 　restrict　(限制) yur freedm. 11.Plice have 　released　(发布) a picture f the man they want t questin. 12.The gvernment must make new 　plicies　(政策) t reduce unemplyment. 
13.The 　trend　(趋势) at the mment is twards a mre natural and less made-up lk. 
二、课文语篇填空There is little dubt 1.　that　 Earth is getting warmer and warmer.There is a lt f 2.　evidence　(evident) t supprt this.In 2013,a dead plar bear was fund n Nrway’s Arctic island f Svalbard.An expert said that the bear appeared t have 3.　starved　(starve) and died.It shwed hw the increase in temperature had an impact n Earth’s eclgy. 
We ften talk abut the greenhuse effect:the “natural” greenhuse effect 4.　and　 the “man-made” greenhuse effect.The “natural” greenhuse effect helps the heat 5.　frm　 the sun be released back int space and keep Earth’s climate warm and 6.　habitable　(habitat). Hwever,the “man-made” greenhuse effect causes Earth’s surface temperature t rise quickly.