1、外研版英语 选择性必修第二册Unit 5 A delicate world Mainly revision for this unit 本课件主要内容安排课件内容1.单元构词扩展词汇2.单元核心词汇讲解3.单元专题语法讲解4.单元重点句型讲解单元构词扩展词汇1.dramatic adj.adv._ 7.secure adj.n._2.conserve v.n._8.biology n.adj._3.immunity n.adj._9.ecology n.adj._pare v.n._ 10.explode v.n._5.mysterious adj.n._ 11.variation n.v._
2、6.criterion n.(pl.)_12.endanger v.adj._dramaticallyconservation immunecomparisionmystery criteriasecuritybiological ecologicalexplosionvaryendangered单元重点短语1.on behalf of 8.in return 2.owe.to.9.add.to.3.remove.from.10.strench on and on 4.in consequence11.be renowned for 5.turn out 12.coexist with 6.b
3、reak down 13.prey on 7.take in14.be native to.词汇一 appetite n.食欲，胃口，爱好，欲望教材原句 Unfortunately,the cats subsquently developed an appetite for the birds,too.不幸的是，猫科动物后来也对鸟类产生了食欲。要点必记develop/create/arouse an appetite for 对产生欲望;to sbs appetite 合某人的胃口;improve/promote the appetite 增进食欲;lack appetite 缺乏食欲sati
4、sfy ones appetite 满足食欲跟踪训练1.Their appetite _ new products also contributes to excessive buying but it is not necessary for them.2.He has such a big appetite _ reading that you never see him without a book.3.她有强烈的求知欲。（翻译）_4.Exercises will increase your appetite for food.（翻译）_5.He has _ strong appetit
5、e for learning on his own and reading.She has a great appetite for knowledge.锻炼身体会增进食欲。for fora词汇二 multiply v.(使)成倍增加教材原句 They multiplied rapidly and began eating the native vegetation and digging holes,which caused soil erosion.他们迅速繁殖，开始吃当地的植被和挖洞，造成了水土流失。要点必记multiply vi.（快速）繁殖multiply.by.乘以.multipl
6、ies the risk of.大大增加.风险考点呈现1.Three _(multiply)by four makes twelve.2.Two multiplied by four _(equal)eight.3.It is possible to multiply these bacteria in the laboratory.(翻译)multipliedequals 在实验室里繁殖这些细菌是可能的。词汇三 owe v.欠（帐）应该做；负有义务教材原句 but we humans owe it to the island to give it a happy ending.但我们人类有愧
7、于这个岛屿，应该给它一个幸福的结局。要点必记owe sth to sb=owe sb sth 欠某人某物；归因（功）于.owe it to sb that-clause 把.归于.owe it to sb to do sth 把.归于.owe sb a favour 欠某人一个人情owing to.由于，因为跟踪训练1.My headteacher gives us much love and care,_ whom we owe many thanks.2.I owe it to him _ I have succeeded in passing the test.3.I think tha
8、t you should owe it to yourself _(get)some professional help with job-hunting.4.How much do I owe you _ the groceries?5.The islands present economy owes a good deal _ tourism.6.He owed his survival to his strength _ a swimmer.to thatto get for to as词汇四 immunity n.免疫力教材原句 It turned out that they deve
9、loped an immunity to the virus,and their numbers exploded once again.结果发现，它们对病毒产生了免疫力，它们的数量再次暴增。要点必记immune adj.有免疫力的；不受影响的；be immune to sth 对.有免疫力；不受.影响；be immmune from 免除；受保护；artificial immunity 人工免疫an immunity to sth 对.的免疫力跟踪训练1.He was so stubborn that he was immune _all suggestions.2.The rule say
10、s that nobody will be given immunity _ taxation.3.Children who have gotten the chickenpox build an immunity _ it so that they do not get it a second time.4.Birds in outside cages develop an _(immune)to airborne bacteria.5.Challenges are regular visitors in our life,and nobody is immune to them.(翻译)_
11、immunitytofromto 我们常常会遇到挑战，没有人会不受到它的影响。词汇五 explode v.突然增加教材原句 It turned out that they developed an immunity to the virus,and their numbers exploded once again.结果发现，它们对病毒产生了免疫力，它们的数量再次暴增。要点必记explosion n.爆炸；爆发；激增a bomb/nuclear/gas explosion 炸弹核气体爆炸;an explosion of interest in learning Chinese 学习汉语的兴趣陡
12、然上升；explode into/with(anger)勃然(大怒);大发(雷霆);突然发生(危险);explode into laughter 哄然大笑跟踪训练1.After ten minutes the game exploded _ life.2.We all exploded into wild _(laugh)when we attended the teachers lecture.3.The _ (explode)which followed blasted out the wall of her apartment.4.Do you fear that youll burst
13、 into tears or explode _ anger in front of her?5.Such anger filled her that she felt she might explode with it.(翻译）_into laughterexplosionwith 她怒火中烧，感到自己快要爆炸了。词汇六 session n.一段时间，(会)期教材原句 The end of a lecture is often followed by a short question-and-answer session.讲座结束后通常会有一个简短的问答环节。要点必记in session 在
14、开会；在开庭；在上课a photo/recording/trainingsession 一次摄影，一场录音，一堂训练课等；in closed session 秘密会议考点呈现1.The Arab League is meeting _ emergency session today.2.It turned out to be _ interesting session with a lively debate.3.I think weve learned a lot about one another in this session.(翻译)_我认为这段时间我们相互有了很多了解。in an 语
15、法 it用作形式宾语 一.概述：it 常常可代替不定式，动名词短语或者从句，而将真正的宾语放在句子后面，以平衡句子结构。二.用法：it 作形式宾语，主要分为下列几种情况:1.动词+it+adj/n.+(for/of sb)+to do sth；2.动词+it+no good/no use/useless/a waste of time.+doing sth;3.动词+it+介词（to/for sb）that-从句；（eg.take it for granted that-clause）;4.动词+it+when(if)-从句（常见的有 enjoy,hate,love,like,dislike,
16、appreciate,prefer）。跟踪训练1.We really appreciate _ when she offered to help at your earlier convenience.2.We think it no use _(complain)if you do nothing.3.You can put it _it was arranged before.4.I dont feel it difficult _(understand)the Special English.5.They found_ pleasant that they worked with us
17、Chinese.6.I leave it to your own judgement _ you should do it.7.He makes it a rule never _(borrow)plainingitthatto understandit whetherto borrow 单元重点句型 1 1.Nor would they fail to imagine how its native inhabitants,including royal penguins,and elephant seals,existed in perfect harmony with their natu
18、ral habitat.他们也不会忘记这里的土著居民，包括皇家企鹅和海象，是如何与他们的自然栖息地和谐共存的。【句型分析】否定副词nor 位于句首，句子须用部分倒装语序。【句型拓展】a.当含有否定意义的词或者短语在原句中作状语时，句子须用部分倒装语序。部分倒装语序常常采用一般疑问句序，即：否定词+be/助动词/情态动词+主语+谓语.b.这样的否定词有：never/neither/seldom/hardly/rarely/scarcely/by no means/in no way/at no time等。跟踪训练1.I will never know what was in his mind
19、at the moment,_ will anyone else.2.Seldom _ it occur to them to wander a bit,to take a moment to see what was around them,3.Nor _ I know what drives me to behave as I do usually,for I just sit there in silence.4.Ive tried hard to improve my English.But by no means _ the teacher not satisfied with my
20、 progress.5.Only then _ she realize how much damage had been caused.neither/nordid do is did 单元重点句型2 2.Recent years have seen more and more pet sliders escaping or being released from homes,and some owners believe to release them into the wild is no big issue.近年来，越来越多的宠物溜出家门或被放生，一些主人认为把它们放生到野外不是什么大问
21、题。【句型分析】本句中，see意为“见证，目睹，经历”，主语为recent years,最近这些年见证了.【句型拓展】see意为“见证，目睹，经历”时，常常用时间或者地点的名词作主语，表示某时间或地点“见证，目睹，经历”了某事。类似的词还有：find/witness/say/experience等，这些词以物作主语，表示一种拟人的手法，使得语言更生动。理解应用1.The last 30 years _(see)the great number of laws stopping our rights and progress in USA.2.The tea house torn down la
22、st year _(witness)a really enjoyable time for those old men.3.The clock said four minutes past eleven when we set off.(英译汉)4.Our country has experienced great changes in the last 20 years.(英译汉)5.The study found that knowing another happy person increases your own happiness.我们出发时，时钟显示11点4分。have seenw
23、itnessed在过去的20年里,我们国家经历了巨大变化。研究表明，接触一个快乐的人可以把自身的快乐程度提高 单元重点句型 3.Is it the legendary father of Chinese herbal medicine,Shennongjia,after whom the park is named?传说中的中草药之父神农架，公园就是以他的名字命名的吗?【句型分析】句子中“after whom”引导非限制性定语从句，介词after 源于从句中固定短语name after:以.来命名;whom 指先行词shennongjia.【句型拓展】介词+关系代词whom/which 引导的
24、定语从句，which指事物，而 whom指人；介词 来自从句的逻辑搭配。注意：这种情况下，关系词不能使用that,who或者其他关系副词。理解应用1.I never forget the day _ which Tom came to this company.2.This is Toms notebook without _ he cannot check his design drawing.3.We marched through the square,in the middle of _ stood a monument.4.Tom work in a company the gate _which opens to the north.5.The reason _ which I was praised by the manager was that I worked hard.6.There came the boy,_ whom his father had waiting for a long time.on whichwhich of for for