外研版 (2019)必修 第三册Unit 3 The world of science教课内容课件ppt

这是一份外研版 (2019)必修 第三册Unit 3 The world of science教课内容课件ppt，共38页。PPT课件主要包含了sandstorm，mass ，campaign ，process ，citizen ，dust ，forecast ，strength ，mask ，砍倒 等内容，欢迎下载使用。
A Speech abut SandstrmGd afternn,ladies and gentlemen!Tday I’m ging t talk abut sandstrm.Sandstrm is a kind f bad weather which is becming increasingly cmmn in Nrthwestern China,and it usually happens in spring and fall.Thugh I’m nly 13,I have experienced it and suffered frm it quite a lt.I’m sure mst peple still remember the sandstrm that happened last mnth.It swept acrss the large area f 11 prvinces and caused a great lss t ur natin.As yu can see n TV,when a sandstrm cmes,the wind blws strngly with dust and sand.Smetimes trees are even brken dwn in half,and little birds cannt find their hmes. Smetimes cluds f dust are s thick that little kids cannt find their ways.It’s like the end f the wrld.
We lve beautiful spring.We cherish1 bright sunshine.But sandstrms destry all the lvely things.Yet we knw it is Mther Nature’s revenge2 n what we have dne t her.In rder t see blue sky and sunny spring again,we shuld plant mre trees and mre grass t prtect the envirnment.And it is nt t late if we start right nw.Thugh it’s a hard jb t fight against the sandstrm,it is a battle we must fight,and it is a battle we must win!Thank yu!单词注释1.cherish v.珍惜2.revenge n.报复,复仇
难句剖析Yet we knw it is Mther Nature’s revenge n what we have dne t her.然而我们知道沙尘暴是大自然母亲对我们对她所做的一切进行的报复。knw后跟的是宾语从句,其中what引导的名词性从句作介词n的宾语。导读诱思1.What happens when there is a sandstrm accrding t the passage?2.What can we d t prevent the sandstrm?
答案:The wind blws strngly with dust and sand.Trees are smetimes brken dwn in half.Birds can’t find their hmes and little kids can’t find their ways.
答案:We shuld plant mre trees and grass.
Sectin Ⅰ　Intrductin,Reading & Vcabulary
一、根据英文释义选出相应单词mass　campaign　sandstrm　frightening　dust　frecast　prcess　citizen　strength　mask1.　　　　　　a strm in a desert in which sand is blwn int the air by strng winds 2.　　　　　　causing fear r terrr 3.　　　　　　a large number/amunt f 4.　　　　　　a series f planned mvements that are intended t achieve scial,cmmercial r plitical aim 5.　　　　　　a series f actins that are dne in rder t achieve a particular result 6.　　　　　　smene wh lives in a particular twn,cuntry,r state 
frightening
7.　　　　　　the very small pieces f dirt 8.　　　　　　t say what is likely t happen in the future,based n the infrmatin that yu have nw 9.　　　　　　the quality f being physically strng 10.　　　　　　a piece f clth r ther material that yu wear ver all r part f yur face t prtect yu frm germs r harmful substances 
二、短语翻译1.cut dwn 　　　　 2.be caught in 　　　　  3.as a result f 　　　　 4.because f 　　　　  5.ne after anther 　　 　　 6.sweep away 　　　　 7.advise sb.(nt)t d sth. 　　　　  8.prevent sb. (frm) ding sth. 　　 　　 
建议某人(不)做某事
三、阅读课文Sandstrms in Asia,选择最佳答案1.What is the best descriptin abut a sandstrm accrding t the passage?A.It is a majr disaster fr many Asian cuntries fr is a strng dry wind carrying is a way t cause land t becme is a kind f natural disaster that can’t be treated.
2.What is the main reasn fr the increase f sandstrms in China recently?A.It is clse t many wrsening f the weather in is a result f plant trees and dig up effects are sandstrms bringing t peple living in cities?A.The whle city is usually cvered by thick and yellw mves very can’t breathe well and the dust makes them f the abve.
4.What is the best way t reduce the effects frm the sandstrm?A.T live far away frm stay at hme when a sandstrm wear mask if yu want t g plant mre trees.
mve sand dunes
desertificatin
cming nearer
五、课文填空Sandstrms have been a majr 1.　　　　　fr many Asian cuntries fr centuries.Scientists have tried many ways t slve 2.　　　　　. Sandstrms are strng,3.　　　　　winds that carry sand.They are ften s 4.　　　　　that yu cannt see the sun,and the wind is smetimes 5.　　　　　enugh t mve sand dunes.The fur main places in the wrld 6. 　　　　　there are sandstrms are Central Asia,Nrth America,Central Africa and Australia.Ren Jianb 7. 　　　　　a terrible sandstrm he experienced as a child in the desert.“T have been caught in a sandstrm was a terrible 8.　　　　　,”
experience
he said.“It was the mst frightening and the mst dangerus 9.　　　　　 I’ve ever been in.Yu just had t hpe yu’d 10.　　　　　.I thught I was ging t disappear under the sand.” 
1.It lasted fr ten hurs and was very frightening.它持续了10小时而且非常可怕。★考点:frightening adj.令人恐惧的,令人害怕的Actually,cmpetitin is nt as frightening as yu think.实际上,竞争并不像你想得那么恐怖。考点延伸1)阅读下列句子,体会黑体词的词性及含义①Srry,I didn’t mean t frighten yu.对不起,我没打算吓唬你的。词性:动词　含义:使惊恐;吓唬
②I can’t say a wrd with fright.我因受到惊吓一句话也说不出来。词性:名词　含义:惊骇;吃惊2)阅读下列句子,体会frighten的相关短语及含义①I’m frightened f walking hme alne in the dark.我害怕在黑夜里单独走路回家。短语:be frightened f(ding sth.)　含义:害怕做某事 ②She was frightened at the traffic accident which tk place yesterday.她对昨天发生的交通事故感到害怕。短语:be frightened at　含义:对……感到害怕 
③I jumped in fright.我吓了一跳。短语:in fright　含义:惊恐地 ④He frightened the little by int giving him all the mney.他恐吓那个小孩把所有的钱都给了他。短语:frighten sb.int ding sth.　含义:恐吓某人做某事 3)辨析:frightening/frightenedfrightening和frightened都是形容词,frightening表示主语或中心词的特征;frightened表示主语或中心词的感受。①It’s frightening t think it culd happen again.想到此事可能再次发生就使人不寒而栗。②Althugh frightened,she answered with a calm vice.虽然她害怕,但还是用平静的声音回答。
2.“T have been caught in a sandstrm was a terrible experience,” he said.他说:“遭遇沙尘暴是一次可怕的经历。”★考点:be caught in 突然遭遇(风暴等)We have been caught in the rain and are wet all ver.我们遇到了大雨,全身都湿透了。考点延伸阅读下列句子,体会catch的相关短语及含义①Catch hld f this rpe,and we’ll pull yu up.抓住这根绳子,我们就会把你拉上来。短语:catch hld f　含义:抓住,握住 
②We have dne all that we culd t catch up with them.我们已经尽了一切可能来赶上他们。短语:catch up with　含义:赶上 ③I caught sight f her getting n the bus when I came ut f the bkstre.我从书店出来时看见她上了公共汽车。短语:catch sight f　含义:看见 ④The lady repeated her questin several times but I still culdn’t catch n.那位女士把她的问题重复了好几遍,但是我还是没听懂。短语:catch n　含义:理解 ⑤Bb was caught reading my private letters.鲍勃被捉到阅读我的私人信件。短语:catch sb.ding sth.　含义:抓住某人做某事 
3.Sandstrms in China appear t have increased in recent years as a result f “desertificatin”.因“荒漠化”越发严重,中国近年来发生沙尘暴的次数明显增加了。★考点:as a result f 由于,因为……的缘故He has lst all his friends as a result f his flish behaviur.由于他的愚蠢行为,他失去了所有的朋友。考点延伸阅读下列句子,体会result的相关短语及含义①He ate t much,as a result,he was sick.他吃得太多了,结果,他很难受。短语:as a result　含义:作为结果,因此 
②Hard wrk will result in success.勤奋才能导致成功。短语:result in　含义:导致 ③His illness resulted frm having bad fd.他的病是由于吃了变质的食物引起的。短语:result frm　含义:起因,由于 ④I’ve been trying t pen the bx,but withut result s far.我一直在设法打开箱子,但到现在也没打开。短语:withut result　含义:毫无结果 
3)His lung cancer resulted 　　　　　smking t much. 答案:1)as　2)in　3)frm
4.This is a prcess that happens when land becmes desert because f climate changes and because peple cut dwn trees and dig up grass.这个过程发生在土地变成沙漠的时候,而土地沙漠化是由气候变化和人类乱砍树林、挖草根所致。★考点:cut dwn 砍倒We cut dwn and burn millins f trees every year.我们每年砍伐、烧毁上百万棵树。考点延伸阅读下列句子,体会cut的相关短语及含义①We need t cut the article dwn t 1,000 wrds.我们需要把这篇文章压缩到1,000字。短语:cut dwn　含义:缩小,削减 
②I cut dwn all the dead trees.我把所有的枯树全都砍掉了。短语:cut dwn　含义:砍倒 ③It is implite fr children t cut in when their senirs are talking.对孩子们来说,长辈们谈话时插嘴是不礼貌的。短语:cut in　含义:打断(谈话),插嘴 ④Our water supply has been cut ff.我们断水了。短语:cut ff　含义:中断,停止 ⑤Yu can cut ut the unimprtant infrmatin in the passage.你可以删掉文章中不重要的信息。短语:cut ut　含义:删除,删去 ⑥She cut up the carrts and put them in the pt.她把胡萝卜切碎放入锅中。短语:cut up　含义:切碎,剁碎 
5.Sandstrms smetimes affect Beijing.沙尘暴有时候会影响北京。★考点:affect vt. 影响,作用D cmputer games affect children’s behaviur?电脑游戏影响孩子们的行为吗?考点延伸1)阅读下列句子,体会黑体词的词性及含义①He was deeply affected by what I said.他听了我的话很受感动。词性:动词　含义:(使)感动②The cnditin affects ne in five wmen.每五个妇女中就有一人患有这种病。词性:动词　含义:使感染,患……
2)阅读下列句子,体会affect的相关短语及含义①She was deeply affected by the sad stry.她被那个悲伤的故事深深感动了。短语:be affected by　含义:被……感动 ②He was affected with high fever.他发高烧。短语:be affected with　含义:患……病 3)辨析affect/influence/effectaffect影响;感染;感动。常指一时的影响,尤指不良影响。influence影响。常指长时间、潜移默化的影响。effect名词。指影响、效果、作用。
①An unhappy hme envirnment can affect a child’s grwth.不愉快的家庭环境能影响儿童的成长。②Bth diet and exercise have a great effect n bld pressure.饮食和运动都对血压有影响。③It’s clear that her painting has been influenced by Picass.她的画显然受了毕加索的影响。
6.When a sandstrm arrives in the city,weather experts advise peple nt t g ut.当沙尘暴到达北京时气象专家们建议人们不要外出。★考点:advise vt. 建议;劝告,忠告The dctr advised me t take mre exercise.医生建议我多加锻炼。考点延伸1)阅读下列句子,体会黑体词的词性及含义①Yu’d better take my advice.你最好听从我给你的建议。词性:名词　含义:劝告,忠告,建议
②It is advisable t wear a mask in such bad weather.在这样糟糕的天气,你最好戴上口罩。词性:形容词　含义:适当的;明智的2)阅读下列句子,体会advise的相关短语及含义①The manager advised hlding a meeting t discuss it.经理建议召开会议讨论这件事。短语:advise ding sth.　含义:建议做某事 ②He advised me nt t smke in the ffice.他建议我不要在办公室内吸烟。短语:advise sb.(nt) t d sth.　含义:建议某人(不)做某事 3)辨析advise/persuadeadvise sb.t d sth.建议某人做某事。但不一定说服。persuade sb.t d sth.说服某人做某事。
7.T prevent it cming nearer,the gvernment is planting trees.为阻止沙漠蔓延,政府正在植树造林。★考点:prevent sb./sth.(frm) ding sth.阻止……做某事What prevented yu(frm) jining us last night?昨天晚上什么事使你不能加入我们?考点延伸阅读下列句子,体会黑体词的相关短语及含义①Yu must think f a way t stp children (frm) getting int dangerus areas.你们必须想出办法阻止孩子们进入危险地区。短语:stp sb./sth.(frm) ding sth. 含义:阻止某人/某事发生
②The heavy fg kept us frm seeing anything.浓雾使我们看不到任何东西。短语:keep sb./sth. frm ding sth. 含义:阻止……做某事③We were prevented/stpped frm ging t wrk by the heavy rain.大雨阻止我们去上班。短语:be prevented/stpped frm ding sth. 含义:被阻止做某事归纳:阻止……做某事,prevent/stp...(frm) ding sth.主动语态时frm 可以省略,但用于被动语态时,frm不可省; ding sth.任何时候frm不可省。