冀教版九年级下册英语第15课课件.ppt

Lesson 15:Cloning QuestionsWarming upWhat do you know about DNA?What is clone?v克隆是英语单词clone的音译，clone源于希腊文klon，原意是指幼苗或嫩枝，以无性繁殖或营养繁殖的方式培育植物，如杆插和嫁接。如今，克隆是指生物体通过体细胞进行的无性繁殖，以及由无性繁殖形成的基因型完全相同的后代个体组成的种群。克隆也可以理解为复制、拷贝，就是从原型中产生出同样的复制品，它的外表及遗传基因与原型完全相同。1997年 2月，绵羊“多利”诞生的消息披露，立即引起全世界的关注，这头由英国生物学家通过克隆技术培育的克隆绵羊，意味着人类可以利用动物身上的一个体细胞，产生出与这个动物完全相同的生命体，打破了千古不变的自然规律。Is it a good idea to clone people?If people were cloned,I think its an good idea becauseI think its a terrible thing becauseWhat is a mammoths?Is it still living on earth?Where and when did it live?New words nor aonj.也不 neithernor 既不 也不discuss v.讨论mammoth n.猛犸dead adj.死的Listening Task:vWhat did Li Ming study this week in school?vDNAvWhats the name of the first cloned animal？vDollyReading Task:True or FalsevLi Ming dont think cloning is interesting.vLi Ming knew how the sheep Dolly cloned.vJenny has ever studied cloning.Language NotesIt was quite interesting!他非常有趣！interesting adj.有趣的，一般指事物，表示“令人感到有趣的”。I have an interesting book.我又一本有趣的书。interested adj.常指人，表示“感到有兴趣的”，常用词组be interested in。They are interested in math.他们对数学有兴趣。【注意】：interested只能做主语，而interesting既可以作表语，有可以作定语。wScientists are doing so many new things with DNA.科学家们正在用DNA制造新东西。w不同的“用”w1)with介词“用”，后面常跟表示“某种工具或手段”的名词。wI cut the apple with a sharp knife.我用一把锋利的刀子削苹果。wTom drew the picture with a pencil.汤姆用铅笔画画。w2)动词“用，使用”。wMr.is used the names of men.用在男性姓名前。wHow do you use a telephone?你怎样使用电话？w3)介词“用”，后面常跟表示“某种原料、语言”的名词。wWe often write in ink.我们经常用墨水写字。wPlease speak in English.请用英语讲话。I knew that English scientists had cloned a sheep,but I knew neither how nor why.我知道英国科学家已经克隆出了一只绵羊，但我既不知道怎样克隆也不知道为什么克隆。neithernor“既不也不可”，连接任意两个并列的成分。当neithernor连接两个主语时，谓语动词应遵循“就近原则”，即与最近的主语保持一致。She likes neither butter nor cheese.她既不喜欢黄油也不喜欢奶酪。Neither dad nor mum is at home.今天爸妈都不在家。【友情提示】：若将neithernor句型变为肯定句，只需把neithernor改为bothand即可，同时谓语动词必须用复数形式。Both dad and mum are at home.今天爸爸和妈妈都在家。Some of my classmates thought it was a good idea,but I dont think so.一部分同学认为那是一个好想法，我却不这么认为。some of表示“中的一些”，其后要用名词的复数形式。如：Some of the students wear black shorts.一些学生穿黑短裤。vHow would you feel if a scientist designed someone identical to you?如果科学家设计了一个和你完全一样的人，你感觉怎样？vfeel用法小结：feel通常具有行为动词和联系动词两种不同的用法。v1)feel用作行为动词，通常用于以下几个句式：va.feel跟名词或代词作宾语，意为“感觉到，触摸”。如：vI can feel something on my face.我能感觉到我脸上有什么东西。vThe children feel the elephant one by one.孩子们一个接一个地摸那只大象。b.feel后跟复合宾语（宾语+宾语补足语），意为“觉得”。如：I felt somebody walking behind me.我觉得后面有人在跟着我走。She feels him to be the best player.她觉得他是最好的运动员。Many students feel English difficult to learn.很多学生觉得英语难学。c.feel常跟在动词后作宾语补足语的有现在分词、不定式、形容词等。2)feel用作连系动词，后跟形容词作表语。如：I feel very cold.我觉得很冷。I didnt feel well this morning.今天上午，我觉得不舒服。She doesnt feel well.她感到不舒服。【拓展】：连系动词还有look（看上去），turn（变得），get（变）等。The leaves turn green in spring.春天树叶变绿了。The days get shorter in winter.冬天白天渐渐短起来了。使用连系动词feel时常用一般现在时态，而不用进行时态。如：Do you feel cold?你感到冷吗？I feel sick.我觉得不舒服。n n【注意注意】：n n表示感觉的动词表示感觉的动词feel,hear,watch,seefeel,hear,watch,see后的动词不后的动词不定式需省略定式需省略toto。n ndesign design vt.&vivt.&vi.设计；会址；绘图设计；会址；绘图n nWho designed the new school?Who designed the new school?谁设计的这所学谁设计的这所学校？校？n n【拓展拓展】：n ndesign design n n.（常与（常与forfor连用）计划，图样，设计图，连用）计划，图样，设计图，目的目的n nHere is the design for a new house.Here is the design for a new house.这是一所新这是一所新房子的设计图。房子的设计图。n nThey have designs on your money.They have designs on your money.他们对你的钱他们对你的钱有企图。有企图。First we saw a movie about Dolly the sheep.首先，我们看了一部克隆羊多莉的电影。movie n.电影，影片，影院see a movie去看电影【知识衔接】：film n.电影，影片；拍电影，拍成电影Have you seen any good films lately?最近你看过什么好电影吗？The television company is filming in our town.电视公司正在我们镇上拍片子。l lMaybe I will become a scientist and discover the Maybe I will become a scientist and discover the answer.answer.也许我将来会成为一名科学家，我会找到答案也许我将来会成为一名科学家，我会找到答案的。的。l l1)maybe 1)maybe adv.adv.或许，大概或许，大概l lMaybe it is right.Maybe it is right.这或许是对的。这或许是对的。l lMaybe he will help you.Maybe he will help you.也许他会帮助你。也许他会帮助你。l l【辨析辨析】：maybemaybe与与may bemay bel lmaybemaybe和和may bemay be虽然形式相像，但意义不同。虽然形式相像，但意义不同。maybemaybe是是副词，意为副词，意为“很可能；大概很可能；大概”，是美语用法，在英国多，是美语用法，在英国多用用perhapsperhaps，在句子中作状语。，在句子中作状语。may bemay be是情态动词是情态动词may may+be+be，在句子中作谓语，意思为，在句子中作谓语，意思为“可能是可能是”。如：。如：l lMaybe you are right.Maybe you are right.也许你是对的。也许你是对的。l lHe may be a teacher.He may be a teacher.他可能是个教师。他可能是个教师。l l2)discover 2)discover vtvt.发现，发觉发现，发觉l lColumbus discovered America in 1492.Columbus discovered America in 1492.哥伦布于哥伦布于19421942年发现了美洲。年发现了美洲。n n【注意】：n ndiscover意为“发现”（原先就存在而不为人知的地方和事实）；invent意为“发明”（原先不存在的机器或方法等）；而find意思是“找到丢失的或不知道的人或物”。n nWho invented the computer?谁发明了电脑？n nWhere did you find the lost child?你们在哪儿发现那个丢失的孩子的？Talk about what,where,when,why and how cloning is Talk about what,where,when,why and how cloning is taking place.taking place.谈论一下克隆正在发生的情况，包括克隆谈论一下克隆正在发生的情况，包括克隆对象、克隆地点、克隆时间、克隆原因和克隆方式等。对象、克隆地点、克隆时间、克隆原因和克隆方式等。take placetake place通常指通常指“（某事）按计划进行或按计划发生（某事）按计划进行或按计划发生”。Great changes have taken place in China.Great changes have taken place in China.中国发生了中国发生了翻天覆地的变化。翻天覆地的变化。此外此外take placetake place还有还有“举行举行”的意思。的意思。The meeting will take place next Friday?The meeting will take place next Friday?会议将在下周会议将在下周五举行。五举行。【知识衔接知识衔接】：happenhappen常指具体事件的发生，特别指那些偶然的或未能常指具体事件的发生，特别指那些偶然的或未能预见的预见的“发生发生”。New things are happening all around us.New things are happening all around us.我们身边总有我们身边总有新事发生。新事发生。happenhappen还可表示还可表示“碰巧，恰好碰巧，恰好“之意。之意。It happened that I had no money on me.It happened that I had no money on me.我刚好没钱了。我刚好没钱了。