九年级英语上册 Unit 5 Lesson 29 DNA—The Story of You课件.ppt

1. Write a passage about DNA, try to tell what it is, where it is from, what things you show your parents’ DNA? 2. Preview Lesson 30. Lesson 29: DNA—The Story of You I. Learning aims: The new words: DNA, blueprint, general, complex, twin, repeat, pattern, identify, related, grandson, granddaughter, instruction II. Train the speaking and writing abilities. New Words DNA blueprint general complex twin repeat pattern identify related grandson granddaughter instruction Do you and the students near you look the same? What is the same? Warming up Zhang Liangying looks like her mother. Identical twins are two children that grew from the same egg. They have identical DNA. They’re clones! Do you and the students near you look the same? What is the same? Are there any differences between you and them? What can scientists do with “DNA”? Free Talk Listening Task Generally speaking, a ________ is a drawing. ______ for identical twins, each living thing has its own unique DNA. blueprint Except Where does your DNA come from? Your parents. Is your DNA in every part of your body? Yes, it is. Reading Task Do you and the students near you look the same? Are there differences between you and them? What can scientists do with “DNA”? Listen and Think 1. But building a living thing is far more complex than building a house. Language points 比较级前可以用much, even, still, far, a bit, a little, a lot 等词加以修饰。 This unit is much easier than that one. 这个单元比那个单元容易得多。 2. own 的用法 1）adj. 自己的 （用在所有格后，加强语气） Now ask the same questions about your own teachers. She makes all her own clothes. 2) vt. 有，拥有 Who owns the bike? 3. except for 除……以外，只是 He is a good man except for hot temper. Your article is quite good except for several spelling mistakes. 4. not only ... but also ... 不但……而且…… 连接两个