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1、Lesson 10:What is DNA？Warming uplDo you and the students near you look the same?What is the same?twinsAre there any differences between you and your friends?Zhang Liangying looks like her motherdiscussionDo you look like your father or mother?Do you know why?Do you know DNA?Are your fingerprints the
2、 same as your mothers?New wordsl lblueprint n.蓝图l l except for 除了l lidentical adj.完全相同的l ltwin n.双胞胎l lidentify v.鉴别；确认l lnot only。but also 不但 而且Listening Task:vGenerally speaking,a _ is a drawing.v_ for identical twins,each living thing has its own unique DNA.blueprintExceptReading Task:vWhere does
3、 your DNA come from?vYour parents.vIs your DNA in every part of your body?vYes,it is.You DNA comes from your parentsIdentical twins are two children that grew from the same egg.They have identical DNA.Theyre clones!Language notesAre there differences between you and them?你和他们之间有什么不同吗?【辨析】：between与am
4、ongbetween常用于两者之间，among一般指三者或三者以上，如果指三个以上的人或物的每两个之间时，仍然要用between。Switzerland lies between France,Italy,Australia and Germany.瑞士位于法国，意大利，奥地利及德国之间。They live among the mountains.他们住在群山之中。I was among the crowd.我处在人群中。l lYou use it to build a house.You use it to build a house.你用它来建造房子。你用它来建造房子。l luseuse的
5、用法的用法l luseto do useto do sthsth.用用做某事做某事l lHe is using a knife to cut bread.=He is using a knife He is using a knife to cut bread.=He is using a knife for cutting bread.for cutting bread.他正用小刀切面包。他正用小刀切面包。l lUse your eyes to look and dont use your hands to Use your eyes to look and dont use your ha
6、nds to touch.touch.用眼睛看而不用手摸。用眼睛看而不用手摸。l lIt is no use doing(to do).It is no use doing(to do).做做是无用的（无益的）是无用的（无益的）l lIt is no use crying over spilt milk.It is no use crying over spilt milk.不要为打翻的牛奶哭不要为打翻的牛奶哭泣。（覆水难收）泣。（覆水难收）l l【注意注意】l luseuse的名词和动词同形，但要注意两者的读音的名词和动词同形，但要注意两者的读音/ju:zju:z/是是动词的读音，而动词的读
7、音，而/ju:sju:s/是名词的读音。是名词的读音。usefuluseful是形容词，是形容词，它是由名词它是由名词useuse加后缀加后缀-fulful构成的。如：构成的。如：l lWhats the use of this?Whats the use of this?这个有什么用途？这个有什么用途？l lIs the fridge very useful?Is the fridge very useful?这台冰箱很有用吗？这台冰箱很有用吗？DNA is a pattern,too.DNA也是一种模型。too也too表示“也”时通常置于句末，其前用逗号，其后用句号。如：I have se
8、en the film,too.我也看过那部电影。【辨析】：too与eithertoo与either都表示“也”，其区别是too用于肯定句，表示“也”；either用于否定句，表示“也不”。他们通常都位于句末，其前用逗号隔开。如：He has a sister,too.他也有个小妹妹。He doesnt have a knife,either.他也没有小刀。n nExcept for identical twins,each living thing has its own unique DAN.除了每个双胞胎之外，每个生物都有他唯一的DNA。n n1)except for除以外，只是n nH
9、e is a good ma except for hot temper.除了脾气暴躁外，他是个好人。n nYour article is quite good except for several spelling mistakes.你的文章很好，只是有几处拼写错误。n n2)【辨析】：every与eachevery与each都可与单数名词连用，且意义相近，表示“每个”，然而every与each并不完全一样，every强调整体概念，each则表示个体概念。如：Each day is better than the one before.一天比一天好。Every player was in g
10、ood conditions.每个运动员都处于很好的状态。如果不特别强调某一意义时，every和each可以互换。如：We want every child to succeed.我们希望每个孩子都成功。Each child will find his own road to success.每个孩子都会找到他个人的成功之路。l leacheach可以指两个或两个以上的人或东西，可以指两个或两个以上的人或东西，everyevery却却不能指两个，只能指三个以上的数量。如：不能指两个，只能指三个以上的数量。如：l lEach sex has its own physical psychologi
11、cal Each sex has its own physical psychological characteristics.characteristics.男女各有其身体上和心理上的特男女各有其身体上和心理上的特点。（不能说点。（不能说every sexevery sex）l l另外，如有其它限定词同时修饰中心词，另外，如有其它限定词同时修饰中心词，eacheach可可作代词用作代词用each ofeach of的形式，而的形式，而everyevery则只能用限定词。则只能用限定词。如：如：l lEach of my parents gave me presents for Each of
12、 my parents gave me presents for Christmas.Christmas.过圣诞节是我父母每人都给了我礼物。过圣诞节是我父母每人都给了我礼物。v3)own的用法vadj.自己的（用在所有格后面，加强语气）vNow ask the same question about your own teachers.现在请向你自己的老师问同样的问题。vShe makes all her own clothes.他所有的衣服都是自己做的。vvt.有；拥有vWho owns the bike?这辆自行车是谁的？v【友情提示】：vowner n.所有人；物主vHe is the
13、owner of the house.它是这座房子的主人。vThe owner of the shop came to see what was the matter.店主人走过来看看发生了什么事情。From your DNA,scientists can identify not only you but also people related to you.在你的DNA中，科学家们不但能鉴别你，而且也能鉴别和你有关系的人。1)not only but also不但而且，连接两个相同的成分，也可连接两个分句。not only but also连接两个并列主语时，谓语动词和后面助于保持一致；n
14、ot only but also连列两个并列分句，not only置于句首，通常用倒装结构，也就是说，把not only引导的分句中的助动词或be提到主语前面。He likes not only English but also math.He likes not only English but also math.他不仅他不仅喜欢英语，而且喜欢数学。喜欢英语，而且喜欢数学。Not only you but also I am a teacher.Not only you but also I am a teacher.不仅你而不仅你而且我也是一名老师。且我也是一名老师。Not only d
15、oes he work hard,but also he is very Not only does he work hard,but also he is very clever.clever.他不仅工作认真，而且很聪明。他不仅工作认真，而且很聪明。2)relate to2)relate to涉及，有关涉及，有关The story related to the Second World War.The story related to the Second World War.故事故事讲的是第二次世界大战的事情。讲的是第二次世界大战的事情。I have a book relating to the Autumn Harvest I have a book relating to the Autumn Harvest Uprising.Uprising.我有一本关于秋收起义的书。我有一本关于秋收起义的书。