2022-2023学年冀教版九年级全册Unit 5 Look into ScienceLesson 29 DNA—The Story of You教学课件(共23张PPT)

(共23张PPT)
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.
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
New Words
DNA blueprint
general complex
twin repeat
pattern identify
related grandson
granddaughter instruction
1.do with
2.in geeneral
3.far more complex
4.millions of
5.fit the world
6.influence sb/sth
7.except for
8.for example
9. the same ...as
10 be related to
11. one of the most amazing things
对付 处理
一般而言
复杂得多
数百万的
适应世界
影响某人/某物
除......之外
例如
与......相同
与......相关
最令人吃惊的事情之一
Phrases
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……
连接两个相同的成分，也可以连接两个分句。当接两个主语时，谓语动词和后面主语保持一致。
e.g. He likes not only English but also math.
Not only you but also I am a teacher.
5. relate to 涉及；有关
e.g. The story related to the Second World War.
I have a book relating to the Autumn Harvest Uprising.
Students discuss these with their partners, then say out in class.
Let’s do it
Exercises
1. Everyone wrote a good poem _______ her. (除了)
2. _________ Tom, five other boys also passed the exam. (除了…还有)
3. ____________ identical twins, (除……之外) each living thing has its own unique DNA.
except
Besides
Except for
4. All the questions are easy _______ the last one. (除了)
5. There are many others _________ me.
(除了……还有)
6. We all went to Beijing ________ Tom, who has been there before.
except
besides
except
1. I can _______ swim _________ skate.
(不但……而且……)
2. 它不仅能说汉语而且还会说英语。
He can speak ____________________________.
3. Not only you but also I ____ (be) a teacher.
4. Not only I but also he _____ (know) the answer to the question.
am
not only Chinese but also English
not only but also
knows
5. Neither they nor I ______ good at singing.
A. are B. be C. is D. am
6. Both my father and I ______ in the country.
A. enjoys living B. enjoy to live
C. enjoys to live D. enjoy living
D
D
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.