Lesson 29 课件 2024-2025学年冀教版九年级英语全册

Lesson 29 DNA— The Story of You What do you know about DNA? 2. What can scientists do with DNA? DNA is the blueprint (蓝图）of life. “DNA” is short for deoxyribonucleic acid. [di:'ɔksi,raibəunju:'kli:ik 'æsid] They all look like their parents. Because their DNA repeats（重复） patterns（模式） from their parents . In general, twins have the same DNA. n.双胞胎 adj.一般的 There are copies of “DNA” in every part of your body.Your finger has the same DNA as your hair. n.复制品 Grandparents are hugging their granddaughters and grandsons . n. 孙女;外孙女 n. 孙子；外孙 Her grandma didn't hear her. She is repeating the story. v. 重复 New Words n.脱氧核糖核酸 n.蓝图 adj. 一般的；普遍的 adj. 复杂的 更复杂 n.双胞胎之一 v.重复 n.模式；形式 DNA blueprint general complex more complex twin repeat pattern New Words n.孙女；外孙女 v.确认；鉴别 adj. 有关的；相关的 v. 和...有关系 n.孙子；外孙 n.指示；说明 granddaughter identify (identify-identified-identified ) related relate grandson instruction(s) Task-based Reading 1.In general,____________ is a drawing that shows how to put a house together with many different parts. 2.Building a house is less complex than___________________. 3.Where does your DNA repeat from? _________________________________________. 5.All these things are strongly influenced by your DNA before you are born.(翻译） ______________________________________________________ a blueprint building a living thing It repeats patterns from your parents'DNA 所有这些东西在你出生之前都深受DNA影响。 Language Points 1. In general, a blueprint is a drawing / that show/ how to put a house together with many different parts. 一般来说，蓝图就是一幅图纸，它显示一座房子的构造。 in general=generally speaking 总的来说 总的来说，我同意你的观点。 In general/Generally speaking , I agree with you. ________,it's not very bad to work in this factory. A.Generally speak B. Speaking generally C.In general D.In generally 定从 宾从 2. But building a lliving thing is far more comeplex than building a house. 但是创造一个生物比建造一座房子要更复杂得多。 more complex 更复杂 much, a lot, a little,a bit, even, still,far等 修饰形容词和副词的比较级。 “两多两少两甚至一个远得多” Tom is far fatter than me. The problem gets even more serious than before. 3.It takes millions of years /for nature/ to change the DNA( in living things)/ to make them fit the world / 对于自然界来说，它要花费数百万年的时间改变生物的DNA以使它们适于它们生存的世界。 they live in. 定语从句，此处省略which 定从 4.All these things are strongly influenced by your DNA before you are born. 1) influence v. 影响 The terrible weather influences the corn production. influence sb. to do sth.影响某人做某事 是什么影响你从事护理工作？ What influenced you to take up nursing? 所有这些东西在你出生之前都深受DNA 影响！ 4.All these things are strongly influenced by your DNA before you are born. 2) n. [U/C] 影响；作用 have a(an) ... influence on sb./sth. 对...有...影响 My teacher has a (great) influence on me. What's the influence of television on children. 拓展： under the influence of 受到......的影响 I was still under the influence of my parents. 5. Except for some twins, every living thing has its own unique DNA. 除一些双胞胎以外，每个生物都有它自己独特的DNA. ①except for 除...之外 ，说明整体情况后，对细节纠正。 Your article is good except for several spelling mistakes. 我喜欢这个车， 除了它颜色之外。(翻译） It's such a unique car that I like it except for its colour. ②except 除......之外 ，同类事物的排除 Everyone is here__________(除了）Tom, because he is ill. except ③besides “除...之外还有”，表示一种累加关系， besides后面的内容也包括在内 As a Chinese, I can speak English besides Chinese. ④but 除......之外 ， 常与nothing， no， nobody等表示 否定含义的词连用。 I want nobody but you. I did nothing yesterday evening__________(除了）watch TV. A.except B.except for C.besides D. but 6.Some health problems can be caused by problems in your DNA. 一些健康问题可能是由你的DNA的问题引起的。 cause v.引起 ①cause sth. 导致某事 烟头导致了这场大火。 The cigarette causes the big fire. ②sth. be caused by... 某事由...导致 这场大火是由烟头导致的。 The fire is caused by the cigarette. 6.From your DNA,scientists can identify not only you but also people who are related to you. 从你的DNA中，科学家们不但能够辨认出你， 而且能够辨认出和你有关系的人。 identify v.指认（ identifies 三单） identify-identified-identified He identified the thief in the street yesterday. 他经常能快速辨认出他的手提箱因为独特的图案。 He often ________his suitcase in the airport quickly because it has a unique picture. identifies 7.From your DNA,scientists can identify not only you but also people who are related to you. 从你的DNA中，科学家们不但能够辨认出你， 而且能够辨认出和你有关系的人。 relate v. 使.....有联系 related adj.有关系的 be related to/with 和...有关；使相互关联 She is not related to/with this accident. isn't, related, thing, to , you , this(连词成句） _______________________________. This thing isn't related to you 8.Your DNA has billions of instructions 你的DNA有数十亿条指令说明你为什么是这个样的。 that explain why you are the way you are. 定语从句省略in which或that, way 在此处意为“情况，状态” 定从 宾从 定从 8.Your DNA has billions of instructions. that explain why you are the way you are. instructions n.指示；说明（可数），常用复数 follow one's /the instructions 按指示操作 carry out one's instructions 拓展：instruct v.指示；指令 Read the instructions on the bottle before taking the medicine. Translation 1)In general, a blueprint is a drawing 一般说来，蓝图是一幅说明如何把很多不同部分组合在一起构成房子的草图。 that shows how to put a house together with many different parts. 2) It takes millions of years /for nature/ to change the DNA in living things/ to make them fit the world / 对于自然界来说，它要花费数百万年的时间改变生物的DNA以使它们适于它们生存的世界。 they live in. 3)Your DNA has billions of instructions 你的DNA有数十亿条指令说明你为什么是这个样的。 that explain why you are the way you are. Grammar 定语从句 定语从句是指在句中作定语的______。 先行词是被定语从句所修饰的词 （通常是名词或代词）。 关系词，也叫作引导词，是在从句中替代先行词，在定语从句中充当一定的成分，通常是______或______，作_____时常可以省略。 从句 主语 宾语 宾语 关系词的用法 先行词 在从句中作主语 在从句中作宾语 在从句中作定语 指代人 who/that whom/who /that whose 指代物 which/ that which/that whose 关系词 1.（黄岗）You should be thankful to those people____ helped you. A.which B.whom C.who D. whose 2.（随州）--Why are you so worried? --I've lost the watch_____my dad bought me on my birthday. A. what B.who C.whose D.which 3.（咸宁）Readers on CCTV is a great TV show_____ expresses our true feelings by reading aloud in public. A. whom B.who C.whose D.that 定语从句 4.This is the most exciting match _____I have ever been to. A.who B.which C.that D. whose 5.The boy____father is a doctor studies very hard. A.who B.which C.that D. whose 6.I like the house_____window is big. A.who B.which C.that D. whose 7.Liu Yang is the first Chinese woman astronaut ____has ever traveled in space. A.who B.which C.that D. whose 定语从句 Exercises Ⅰ. Fill in the banks with correct words。 1. In g______, women live longer than men. 2.Is wealth __________(和...相关) happiness? 3. I did nothing yesterday ____（除了）see a film. 4. ________(除了) running after success, we have a lot of other interesting things to do in our lives. 5. He is a good man___________（除了） his dishonesty. 6.Jackie gets up early every day ________ (除了）Sunday. but eneral related to Besides except for except 7._____, most teenagers now listen to rock music.However, John likes classical music better.　 A.In a word  B. In general　 C.In time　 D.In total 8.All things are related______all other things. A.for　   B.to　  C.at   D.in 8. Your composition is good_______some spelling mistakes. A. besides B.except C.except that D. except for 9.(中考*兰州）--Would you like to go hiking with us? --What a pity !I am free every day _____ today. A.for B.except C.besides D.among 10. before, complex, far, the, problem, is, more,than _______________________________________. 11. is, carelessness, by, the, his, fire, caused ________________________________? 12. us, influenced, by ,decision, is, his, _________________________________________. The problem is far more complex than before His decision is influenced by us Is the fire caused by his carelessness 13. 他不敢指认那个小偷。（翻译2种）_______________________________________. _______________________________________. He daren't identify the thief He doesn't dare to identify the thief 1.Finish your exercise book 2.Preview the next lesson. Homework $$