英语必修3Module 4 Sandstorms in Asia多媒体教学课件ppt

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Sandstrms in Asia
1.1.1　集合的概念
第一课时　Intrductin & Reading
Ⅰ.写出黑体单词在句子中的含义1．A sandstrm is a strng wind in a desert area，which carries sand thrugh the air.(　　 )2．The training f astrnauts is a lng prcess.(　　)3．He threw it frward with all his strength.(　　)4．The teacher frecast that 15 f his pupils wuld pass the examinatin.(　　)5．There‘s masses f wrk fr her t d.(　 　)6．Peple in the nrth wear masks in winter.(　　)
7．Furteen cities are taking part in a campaign t attract mre turists. (　　)8．It was a very frightening experience and they were very curageus.(　 　)9．The life f rdinary citizens began t change.(　　)10．We will cycle t the park tday.(　 　)
Ⅱ.补全短语1．cut________砍倒2．as a________f由于3．dig________挖掘4．wake up________清楚地意识到5．________this situatin在这种情况下6．be caught________突然遭遇(风暴等)7．prevent...(frm)________sth.阻止……做某事8．ne________anther一个接一个地9．________a particular time在一个特定的时间10．sweep________清除
Ⅲ.完成句子1．They are ften________thick________yu cannt see the sun，and the wind is smetimes strng enugh t mve sand dunes.沙尘暴常常很浓密，以至于遮住了太阳，有时风力大得足以移动沙丘。2．Sandstrms in China__________have increased in recent years as a result f“desertificatin”．因“荒漠化”越来越严重，中国近年来发生沙尘暴的次数明显增加了。
3．The strms smetimes cntinue all day and traffic mves very slwly because the thick dust ____________________.暴风有时持续一整天，车辆开得很慢，因为浓浓的尘埃降低了能见度。
made it difficult t see
Ⅳ.语篇理解Step 1　IntrductinⅠ.When lking at the fllwing pictures，what may ccur in yur mind?Sandstrms f curse！D yu knw the harmful effects f sandstrms?
As far as I knw，sandstrms can_________________________________________________________________________________________________________________
Ⅱ.D yu knw hw many kinds f behavirs are unfriendly t the envirnment?__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Step 2　Fast­readingScan the passage and match each paragraph with its main idea.Para.1　A．Sandstrms smetimes affect Beijing.Para.2　B．Sandstrms d a lt f damage t peple.Para.3　C．The gvernment plants trees t prevent sandstrms.
Para.4　D．Sandstrms have been a majr disaster fr many Asian cuntries fr centuries.Para.5　E．Sandstrms in Asia.Para.6　F．Sandstrms in China appear t have increased.
Step 3　Careful－readingⅠ.Chse the best answer accrding t the passage.1．When sandstrms happen，what will yu wear if yu g ut?A．A hat.　B．A cat.　C．A mask.　D．A tie.2．Hw many kilmetres is the desert away t the west f Beijing?A．350. B．250. C．150.D．200.
3．Which statement is WRONG?A．Peple smetimes can't frecast the strength f a strm.B．The gvernment plans t cntinue planting trees fr the next ten years.C．Nrthwest China is part f the sandstrm center in Central Asia.D．Sandstrms smetimes affect Beijing.
4．Accrding t the text，we can learn that sandstrms ________.A．cause peple t buy mre masksB．are difficult t deal withC．are nt dangerus but frighteningD．will disappear within five years
5．Which f the fllwing is TRUE accrding t the text?A．Ren Jianb thught he wuld prbably die frm the sandstrm.B．A sandstrm can be frecast several mnths befre it arrives.C．Huang Xiamei frequently cycles in sandstrms.D．Sandstrms ccur in Beijing mainly because f its dry climate.
Ⅱ.Fill in the blanks accrding t the passage.
Step 4　SummaryFill in blanks accrding t the passage.Sandstrms have been a majr disaster fr many Asian cuntries fr centuries.Scientists have tried many ways t 1.________this prblem and in China，a mass 2.________has been started t help slve it. Sandstrms are strng，dry winds that carry sand.They are ften 3.________thick that yu can't see the sun，and the wind is smetimes strng 4.________t mve sand dunes.
Nrthwest China is part f the sandstrm 5.________in Central Asia.Sandstrms begin in desert areas.Sandstrms smetimes wake up t an range sky and strng winds that 7.________the city in a thick，brwn­yellw dust.The Chinese Central Weather Statin can 8.________a sandstrm sme weeks befre it arrives in Beijing，but the 9.________f the strm smetimes surprises peple.
The desert is nly 250 kilmetres away t the west f Beijing.In rder t 10.________it cming nearer，the gvernment has planted mre than 30 billin trees and plans t cntinue planting fr the next five years.
Step 5　DiscussinWhat shuld peple d t prtect themselves when a sandstrm cmes?_____________________________________________________________________________________________________________________________________________答案：Step 1Ⅰ.①kill peple and animals，pull dwn buildings and cause pr harvests.
②pllute the atmsphere and carry away tp sil.The breaking ut f sandstrms brings mre slid pllutins int the atmsphere and damages the envirnment and sil in the attacked areas，thus affecting the agriculture fr many years.Ⅱ.cutting dwn the trees/using plastic bags/puring waste water int rivers and ceans/giving ut pisnus waste gases
Step 2　Para.1—Para.6：DEFABCStep 3Ⅰ.1.C　2.B　3.B　4.B　5.AⅡ，dry　2.sand dunes　3.Nrth America　4.desert areas　5.climate changes　6.range　7.Beijing　8.mass campaign 9.30 billin　10.fiveStep 4　1.slve　2.campaign　3.s　4.enugh　5.centre　6.affect　7.cver　8.frecast　9.strength　10.preventStep 5　Peple shuld wear glasses and masks t prtect their eyes and faces.If pssible，they shuld stay at hme when a sandstrm cmes.
1.frightening adj. 吓人的；可怕的①All the stne figures in the temple lked s frightening.庙里所有的石像看上去都那么吓人。②I will never frget that frightening experience.我永远忘不了那次可怕的经历。知识拓展1)frighten v. (使)惊恐Dn't frighten the children!别吓唬小孩子。
2)frightened adj. 感到惊恐的I'm t frightened t ask him nw.现在我吓得不敢问他了。3)frighten的固定搭配：frighten sb.int ding sth.吓唬某人做某事frighten sb.ut f ding sth.使某人不敢做某事be frightened at对……感到惊恐be frightened f(ding)sth.害怕(干)某事
知识拓展v．­ing与v.­ed式形容词：
即学即用语法填空While seeing the________(frighten)mvie，mst f the________(frighten)children cried with great fear.答案：frightening；frightened　现在分词作形容词，常用来说明事物的特征，frightening意为“令人感到恐怖的”；过去分词作形容词，常用来说明人的特征，frightened意为“受到惊吓的”。句意：观看恐怖电影时，大部分受到惊吓的孩子都吓得哭了起来。
2．climate n. 气候①The climate here desn't agree with him.他不习惯这儿的气候。②The climate in ur cuntry is becming better and better.我们国家的气候变得越来越好了。
词语辨析climate与weather1)climate指一个地方恒定的气候状况，包括气温、降雨量、湿度等。The climate here is nt gd fr yu.这里的气候对你不适合。2)weather指一个地方一天或某个时节的具体天气情况，如冷暖、阴晴等。Yu'd better put n yur cat in this cld weather.在这样的冷天里，你最好穿上大衣。
即学即用完成句子The________here agrees with me，and I'm feeling better this mrning because the________tday is fine.答案：climate；weather
3．blw1)v.(blew，blwn)(1)(尤指风、空气等)吹；吹动The wind is blwing hard.风刮得很大。(2)吹气；猛吹He blew and blew，but nthing happened.他吹了又吹，可一无用处。
(3)(使)吹动；吹成(某种状态)①The wind has blwn my hat ff.风把我的帽子刮走了。②My papers are blwing abut.我的报纸刮得到处都是。(4)(使)吹奏；响起t blw a hrn 吹号角
2)n.(1)强风；风暴The big blw brke my windw.大风暴把我家窗子打破了。(2)吹动；吹气Give yur nse a gd blw.把你的鼻子好好地擤一擤。
知识拓展blw ne's nse擤鼻涕blw ne's wn hrn 自吹自擂blw a kiss t smene 送飞吻blw dwn 吹倒blw ut 吹灭blw up (使)爆炸；炸毁
即学即用语法填空The trees______(blw)dwn in the strm have been mved ff the rad.答案：blwn　the trees和blw dwn之间为被动关系，且发生在过去，故用blwn。
4．sign n．标记；符号；记号；征兆；迹象；v.签名(于)；签署；打招呼；做手势①He made a sign fr me t fllw him.他向我示意跟着他(走)。②The sign by the rad says“N Parking”．路边的牌子上写着“禁止停车”。③There are n signs f life abut the huse.这房子没有人住的迹象。
④The cuntries cncerned all agreed t sign the cnventin.有关各国都同意签署这项协定。⑤Bth parties have signed the cntract.双方已经在合同上签字了。⑥He signed me t be quiet.他做手势要我安静。
知识拓展at the sign f 当有……迹象时in sign f 作为……的记号/标志make a sign t 对……作暗号/打手势make n sign f 没有动静/迹象shw a sign f 出现……的样子或形迹；有……的征兆sign away 签字让与，签字放弃sign in 签到；把……的名字登记
sign ff 结束写信sign n签约受雇，签约就聘sign ver签字移文sign up 签字参与某事；签字受雇signable adj.可签名的
词语辨析sign与mark1)sign系常用词，指“具有一定含义的任何有形或无形的符号或标志，它可以表示实物、表情、动作、文字、语言及任何痕迹或征兆”。There is a stp sign at an intersectin.在交叉路口处有停车标志。2)mark指“为某一目的而有意作的标记”，也指“无意留下或自然形成的痕迹”。Suffering left its mark n his face.苦难的经历在他脸上留下了痕迹。
即学即用语法填空The practice f hanging clthes acrss the street is a cmmn________in many parts f the city.答案：sight　sight“情景；景像”，符合句意。句意为：在这个城市的很多地方在街道上方悬挂衣服是常见的景象。
5．majr adj. 主要的；多数的；较大的；重大的①One f ur majr aims f cming here is t visit the Great Wall.我们来这里的一个主要目的是参观长城。②The majr part f the jb is dne by machine.大部分的工作由机器来做。③The teacher played a majr part in the imprvement f teaching.这位老师在改进教学方面起了主要的作用。
知识拓展1)majr vt. 主修；专攻He majrs in chemistry.他主修化学。2)majr n．主修(学科)3)majrity n. [the～](常与f连用)大多数；多数派The majrity f peple prefer peace t war.大多数人喜爱和平而不喜欢战争。注意：the majrity f后跟复数名词，谓语动词用复数；若the majrity单独作主语，谓语动词用单复数皆可。
词语辨析：majr和main①There were n majr injuries.没有发生重大的伤亡。②She nted dwn the main pints f the speech.她把讲话的要点记了下来。
即学即用语法填空He is nw studying in Shandng University，________(majr)in cmputer science.答案：majring　此处majr用作动词，意为“主修”，majring in cmputer science为现在分词短语作状语， 起补充说明的作用，相当于一个并列分句and he majrs...。
6．mass adj. 大量的；大规模的①Their latest prduct is aimed at the mass market.他们的最新产品瞄准了大众市场。②The plice cnsidered it as a mass murder.警方认定这是一次大规模的谋杀。
知识拓展mass n. [C](聚成一体的)团，块，堆；众多，大量；[the­es]群众
①The hill appeared as a black mass in the distance.远远望去，那座山是黑黝黝的一片。②Our cause needs the supprt f the masses.我们的事业需要人民群众的支持。
搭配masses f(＝a mass f)大量的①I've masses f things t d.我有一大堆事情要做。②A mass f men cnsider themselves healthy.很多人都认为自己是健康的。
知识拓展1)be a mass f...满是……；遍布着……2)in the mass＝as a whle 总体上；大体而论In the mass(As a whle)，the bk is wrth reading.就整体来看，这本书值得一读。
即学即用完成句子During the earthquake，a great________f rcks fell frm the muntain and blcked the rad.答案：mass　a mass f意为“大量的”，后可跟可数名词复数或不可数名词。句意：地震期间，一大堆岩石从山上滚下来堵塞了公路。
7．campaign n. [C] 战役；活动①They planned an air campaign.他们策划了一场空中战役。②They started the electin campaign.他们开展了竞选活动。
搭配1)carry n a campaign 发起运动They are carrying n a new campaign against crruptin.他们正在发起一场新的反贪污运动。2)a sales campaign 促销活动This sales campaign was targeted at the yuth market.这次促销活动是以年轻人为对象的。
词语辨析campaign，war，battle
即学即用完成句子This is an imprtant________in the Pacific________.这是太平洋战役中的一次重要会战。答案：battle；campaign
8．prcess1)n. 步骤；过程N ne can hld back the prcess f histry.没有人能够阻止历史的进程。2)v. 审查；处理；加工It may take a few weeks fr him t prcess yur applicatin.审查你的申请书也许要花费他几个星期。
知识拓展in the prcess f(ding)sth.在从事……的过程中be in prcess 在进行中in the prcess 同时；在……过程中①The cmpany is in the prcess f mving int new ffices.该公司正在搬往新的办公室。②New guidelines are in prgress.新的指导方针正在制订中。
即学即用语法填空Achieving a high degree f prficiency in English as a freign language is nt a mysterius________.答案：prcess　考查词义。prcess“过程，程序”；符合句意。句意为：把英语作为一门外语等待掌握并非秘密过程。
9．strength n. [U]力量；力气；[C]长处；优势①She didn't even have the strength t stand up.她连站起来的力气都没有。②The great strength f my plan is that it's s cheap cmpared t the thers.我的计划的最大长处是比其他计划耗资要少。
词语辨析strength，frce，energy，pwer
①He pushed the big stne int the river with all his strength.他用尽全力，将那块大石头推入河中。②Frce can never destry right.暴力决不能摧毁正义。③It's a waste f time and energy.那是在浪费时间和精力。④He has lst the pwer f speech.他丧失了语言能力。
即学即用语法填空—Why d yu chse t wrk in an internatinal travel agency?—Well，yu knw，English is my ________(strng)．S it is my best chice.答案：strength　本题考查名词的用法。句意：你为什么选择在国际旅行社工作？噢，你知道，英语是我的强项。因此这是我的最佳选择。strength 强项，优点，长处，符合句意。
1.cut dwn 砍倒；减少；击倒或杀死某人；或使残废；改短衣服；讨价还价，杀价①Cutting dwn t many trees withut planting sme will make the envirnment wrse.砍太多的树而不种树会使我们的环境更加恶劣。
②The dctrs have advised cutting dwn smking and drinking.医生建议少抽烟、少喝酒。③The rbber cut dwn the persn and ran away in a taxi.抢劫犯把那个人杀了然后乘出租车逃跑了。
cut acrss 抄近路cut at 对准(某人)猛击cut up 剪成碎片cut ff 切断cut ut 剪除cut in 插嘴；突然插入
即学即用语法填空(1)My uncle hasn't been able t quit smking，but at least he has cut________.答案：dwn　句意：我叔叔还没有戒烟成功，但是他已经减少了抽烟的量。cut dwn“减少；缩减”，符合题意。
用cut的相关短语填空(2)The electricity was________fr several days.(3)Please________the vegetables int small pieces.(4)Dn't________while adults are talking.(5)She bught a piece f clth t________a dress.答案：(2)cut ff　(3)cut up　(4)cut in　(5)cut ut
2．be caught in突然遭遇(风暴等)①He was caught in the rain last week and caught a cld.他上星期被雨淋了，患了感冒。②I am afraid that we'll be caught in a traffic jam.我担心我们会遇到交通阻塞。联想be caught ding sth.做某事被当场抓住catch sb.ding sth.撞见某人正在做某事catch sb.in the act f ding sth.当场捉住某人在做非法之事
即学即用完成句子①Hank________________________the earthquake.汉克遭遇了这次大地震。②The thief________________________.这个贼被发现正在偷盗。③She walked t slwly t___________________(赶上)us.④Helen let ut a cry when she_____________(瞥见)a snake.答案：①was caught in　②was caught stealing　③catch up with　④caught sight f
语法填空⑤Because f the traffic jam________which I was caught，I was late fr the meeting this mrning.答案：in　句意：因为遇到了交通堵塞，我今天早上开会迟到了。be caught in“突然遭遇”，此处是将be caught in的宾语提前作先行词，用“介词in＋which”引导定语从句。
3．part f前不加冠词时，指某物的“一部分”，可能指一半以下，也可能超过一半，或仅占一份。而a part f仅指整体一半以下。这两个短语的后面可接单、复数名词或不可数名词。如果part f 作主语，要注意主谓一致。①Part f the huse has been burned dwn.房屋的一部分被烧倒了。②Parts f the bk are interesting.这部书的有些地方写得很有趣。③When cal burns，part f it is left as ash.当煤燃烧后，只剩下部分灰烬。
即学即用翻译句子我们花了一部分时间在博物馆。_______________________________________________答案：We spent part f the time in the museum.
4．ne after anther 一个接一个地；陆续地①They visited his ffice ne after anther.他们一个接一个地参观他的办公室。②As the sldiers had been wunded seriusly in the battle，they died ne after anther after being sent t the hspital.因为士兵们在战斗中受伤严重，他们在被送往医院后陆续死去。
即学即用语法填空There ges the bell and the children are walking ut f the classrm ne________anther.答案：after　句意：铃响了，孩子们一个接一个地走出教室。ne after anther“陆续地；一个接一个地”，强调连续性，符合题意。
1.“T have been caught in a sandstrm was a terrible experience，”he said.他说：“碰上沙尘暴是一次很可怕的经历。”本句为简单句，t have been caught in a sandstrm为不定式作主语。T smke is a bad habit.抽烟是个坏习惯。
知识拓展现代英语倾向于用it作形式主语，而把真正的主语——不定式后置。It's imprtant t knw the meaning f gestures and mvements in the freign cuntries.懂得外国人的手势和身势语很重要。注意：动名词也可作主语。一般来说，表示比较抽象的一般行为的动作多用动名词，表示具体的某次动作，特别是将来的动作时，多用不定式。有时两者都可以。
①Smking is frbidden here.此处禁止吸烟。②T smke s much is nt gd fr yu.你抽这么多烟不好。注意：在It's n use/n gd/useless ding中，用动名词作主语。
即学即用语法填空(1)N matter hw bright a talker yu are，there are times when it's better________(remain)silent.答案：t remain　本题考查非谓语动词。句意：不管你是多么聪明的讲话者，有时你保持沉默比较好。it是形式主语，不定式t remain silent是真实主语。(2)________wrries me the way he keeps changing his mind.答案：It　it为形式主语，真正的主语为the way he keeps changing his mind。
2．Scientists have tried many ways t slve this prblem and in China，a mass campaign has been started t help slve it.科学家们尝试了好多方法去解决这个问题，而且在中国，已经发动全民运动去解决这个问题。本句为and连接的并列句。在第一个分句中，t slve this prblem为不定式作定语，修饰way。
知识拓展(1)“用这种方法”有下列几种说法：①in this way；②by this means；③with this methd(2)by the way 顺便说一下by way f 经由in a way 在某一点上in the way 挡道，碍事n ne's way t 在去……的路途中in this way 用这种方法make ne's way 前进get ne's wn way 随心所欲
即学即用语法填空—I think he is taking an active part in scial wrk.—I agree with yu________(way)．答案：in a way　考查way构成的短语的含义。in a way“在某一点上；在某种程度上”。
Ⅰ.单词拼写1．Mst f the emplyees in this cmpany came frm____________(内陆)cities.2．Never d anything t harm the interests f the________________(群众)．3．The firm is nw in the________(程序)f mving the main equipment t a new place.4．Bill was ding a lt f physical exercise t build up his________(力气)．
5．Every________(公民)has the duty t cntribute t his cuntry.6．The film was very________(可怕的)．I was scared t death when I was seeing it.7．T ensure safety，d nt wear headphnes while driving r________(骑自行车)．8．A man walked in a desert fr tw days and gt himself int a________(沙尘暴)．答案：1.inland　2.masses　3.prcess　4.strength　5.citizen　6.frightening　7.cycling　8.sandstrm
6．If yu want t g ut，yu'd better wear a________.7．Weather experts have________anther big sandstrm in a week's time.8．There are lts f________in the desert.9．A third f Africa is under threat f________.10．Many cities in Nrth China are suffering frm the____________including Beijing.答案：1.Campaigns　2.prcess　3.citizens 　4.strength　5.cycles　6.mask　7.frecasted　8.dunes9．desertificatin　10.sandstrm
Ⅲ.语法填空1．Nticing her husband ________ weight，Mrs.Li decided t ________ the daily fd ratin and cked meals with less fat fr him.答案：putting n；cut dwn　句意为：注意到丈夫在长胖，李女士决定削减丈夫的日常食物用量并且给他做低脂肪的饭。put n weight意为“长胖；增加体重”；cut dwn意为“削减”。
2．Please be quiet—recrding is ________prcess.Otherwise we'll waste a lt f time.答案：in　句意为：请安静——录音正在进行中。否则，我们会浪费很多时间。in prcess意为“在进行中”。3．He desn't even have the________(strng)t walk because f his illness.答案：strength　句意：由于生病，他连走路的力气都没有了。strength“力气；力量”，符合句意。
4．What prevented yur plan ________(carry ut)?答案：frm being carried ut　prevent sb./sth.frm ding sth.意为“阻止某人/物做某事”，此处的yur plan和carry ut(执行)之间为被动关系，故用frm being carried ut。5．The club wmen gathered ________(mass)clthes fr peple in the tsunami­hit cuntries.答案：masses f　masses f可修饰不可数名词，也可修饰复数名词。
6．Susan was cmpletely weighed dwn by the ________f examinatins.答案：stress　句意为：Susan完全被考试的压力压垮(weigh dwn)了。stress意为“压力”，符合句意。7．Helen had t shut t make herself________(hear)abve the sund f the music.答案：heard　句意为：为了让她的声音超过音乐的声音而被别人听到，Helen不得不大声喊。t make herself heard在句中作目的状语，其中herself和hear之间为动宾关系。
8．The little girl was________(frighten)by the man's ________(frighten)vice.答案：frightened；frightening　句意为：这个小女孩被这个男士吓人的声音吓坏了。frighten意为“使害怕”，frightening意为“令人害怕的，吓人的”。9．The by wh seemed t be hnest was caught ________ (steal)in the shp.答案：stealing　sb.be caught ding sth.是catch sb. ding sth.的被动语态，意为“被抓住做某事”。
10．He ________ his girlfriend waiting fr him in the rain fr hurs，as a result，she caught a bad cld.答案：kept　句意为：他让他的女朋友在雨中等了几个小时，结果她得了重感冒。keep sb.ding sth.意为“使某人一直做某事”。符合题意。