(共29张PPT)
Unit 5 Look into Science
Lesson 28 The Study of Living Things
Do you know him
Free Talk
生物
Charles Robert Darwin
He is a .
He studies living things.
biologist
Dig In
Dr. Chip Taylor also loves studying living things.
He studied one kind of North American butterfly.
What mysteries did he find
1. To understand the meaning and usage of the new words and expressions.
2. To review the usage of Attributive Clauses.
3. To learn to study nature and enjoy science.
Learning objectives
New words and expressions.
Chip Taylor [t p te l ]
biology [ba l d i] butterfly [ b t fla ]
migrate [ma ɡre t] fantastic [f n t st k]
completely [k m pli tli]
奇普 泰勒
n. 生物学; 生物
n. 蝴蝶
v. 移居; 迁徙
adj. 奇异的;了不起的;极好的
adv. 完全地
New words and expressions.
grandchild [ ɡr nt a ld]
female [ fi me l] milkweed [ m lkwi d]
chemical [ kem kl] puzzling [ p zl ]
n. 孙子; 孙女;外孙;外孙女
n. 雌性的动物或植物;女子
n. (植)马利筋
n. 化学物质
adj. 令人费解的
1.Dr. Chip Taylor teaches biology at a university in America.( )
2.This butterfly travels about 400 kilometres south in fall.( )
3.In Mexico, the butterflies always return to the same small piece of forest.( )
4.They lay eggs on only one plant：milkweed.( )
5.Scientists understand how the butterflies know when to fly south.( )
T
T
T
F
F
Listen to the text and write true (T) or false (F).
Read the lesson and complete the table.
1
Fantastic facts about butterflies The butterflies always ________ to the same small piece of forest and ________ the winter there.
The butterflies that return to the south are the great great grandchildren of the butterflies that left for the north.
The females _____ eggs on only one plant：milkweed.
return
spend
lay
Read the lesson and complete the table.
1
Things that Dr. Taylor worries about In Mexico, people cut down the trees that the butterflies need to ______on.
In the U.S. and Canada, farmers use chemicals that ______ milkweed.
Things that scientists can’t understand How do the butterflies know when to fly south
How do the great great grandchildren of the butterflies ________ the same forest
find
rest
kill
1. Fantastic facts about the butterfly have been drawing Dr. Taylor's attention. 这种令人着迷的蝴蝶一直吸引着泰勒博士的注意。
have been doing sth.是现在完成进行时, 意思是“一直在做某事”, 表示从过去某时开始的某个动作或状态一直延续到现在, 而且还在进行。常常表示动作的延续性、重复性以及感彩等。
Language Points
eg：Mr.Smith has been living in London since 1995.史密斯先生自从1995年以来一直住在伦敦。（延续性）
Have you been meeting her recently 你最近常见到她吗
（重复性）
Who's been eating my apples 谁吃了我的苹果
（感彩）
draw one's attention “吸引某人的注意力”
eg：He tries to draw our attention to the painting. 他试图把我们的注意力吸引到这幅画上。
[拓展] pay attention to “注意”, “to”为介词,后加名词、代词、动名词。
eg：Pay attention to your handwriting.注意你的书写。
2.Here, as many as 230 million butterflies spend the winter. 多达两亿三千万只蝴蝶在这里过冬。
as many as 意为“多达……; 和……一 样多”, 修饰可数名词复数。
as. . .as 意为“和......一样”,中间加形容词或副词原形, 表示同级的比较。
eg：English words can be as short as one letter. 英语单词可以短到只有一个字母。
Your pen writes as smoothly as mine. 你的钢笔书写起来和我的一样流畅。
其否定式为
not as/so+adj. /adv. +as 意为“不如......”
eg：This dictionary is not as/so useful as you think. 这本词典不如你想像的那样有用。
[注意]
as. . .as结构中, 要使用形容词或副词的原形;
as. . .as即可用于肯定句也可用于否定句;
so. . .as只用于否定句。
3. The butterflies that return to the south are the great-great grandchildren of the butterflies that left for the north. 这些飞回南方的蝴蝶是春天飞往北方蝴蝶的曾曾子孙。
leave for 意思是“到, 去; 出发, 前往”
eg：They left for Shanghai yesterday. 他们昨天去上海了。
They will leave Beijing for Guangzhou tomorrow.他们明天要离开北京去广州。
4. When they begin to travel north in spring, the females lay eggs. 当他们春天开始向北方飞行时, 雌性蝴蝶产卵。
travel 原意是“旅游, 旅行”, 此处意为“迁徙”
north 是副词, “向北方”的意思; 也可说:travel to the north, 这时 north是名词
eg: Scientists still don't understand how butterflies know when to fly south. 科学家们仍然不明白蝴蝶怎样知道何时飞向南方。
5.But in Mexico, people cut down the trees that the butterflies need to rest on because they want more land for farming. 但是在墨西哥, 人们砍伐了蝴蝶赖以栖息的树木, 因为他们需要更多的耕地。
cut down 在本句中的意思是 “砍伐”
eg：Many trees had been cut down so that the soil was washed away. 许多树木被砍伐了, 结果土壤被雨水冲走。
cut down 还有“消减”的意思
eg：We must cut our expenses down in order to live through the whole year. 我们必须减少消费, 以便度过全年。
[拓展] 与 “cut”有关的短语
cut in 打断(谈话), 插嘴
cut off 切断, 断绝
cut out 删除, 停止做(或使用、食用)
cut up 切碎
rest “休息; 安定下来; 放心”
eg：Do you rest any better today 今天你休息得好点吗？
He rested a hand on the man's shoulder. 他把一只手放在那人肩上。
[拓展] rest 还有“剩余部分; 其他事物”的意思
eg：Read out the rest of the text, don't stop!
把文章的剩余部分念出来, 不要停！
6.This worries Dr. Taylor a lot. 这让泰勒博士非常担心。
worry n. “烦恼, 忧虑” v. “担心, 担忧”
worry 作及物动词, 构成结构：worry sb. 使某人担心
eg：I didn’t want to worry my friend. 我不想使我的朋友担心。
worry作不及物动词, 常构成：Don’t worry. “不要担心。”; worry about sth./sb. “担心某事/某人”
eg：Don’t worry. He’ll be all right. 别担心。他会平安无事的。
The child has nothing to worry about. 这个孩子没有什么可担心的。
[拓展] worried adj. “担心的”
be worried about sb./sth. “担心某人/某事”
eg：Don’t be worried about me. I can look after myself.
不用担心我。我能照顾自己。
Join the sentences to make attributive clauses.
2
Example：
We did some experiments yesterday.
The experiments were fantastic.
The experiments that we did yesterday were fantastic.
先行词为物, 用that替代, 放到先行词之后, 把原句加在后面
确定为先行词
定 语 从 句
Join the sentences to make attributive clauses.
2
1.I asked him to mail the letter. I wrote the letter to my cousin.
________________________________________________
2.Yesterday I met a boy. The boy is a new member in our art club. _________________________________________________
3.Mary was carrying a bag. The bag cost her a lot of money.
________________________________________________
4.Football is a team sport. Football is popular all over the world.
_________________________________________________
I asked him to mail the letter that I wrote to my cousin.
Yesterday I met a boy who is a new member in our art club.
Mary was carrying a bag that cost her a lot of money.
Football that is popular all over the world is a team sport.
Work in groups of three to play a game.
3
Task tips：Each group should prepare some pieces of paper and divide them into three columns. Student A writes a person's name in the first column, folds the paper and passes it to Student B．Student B writes a statement beginning with “who”, folds the paper and passes it to Student C．Student C must finish the sentence and read it out loud.
Example：
Mr. Brown who is a biologist will give us a talk
Show your sentences to the class.
Action
What did we learn
biology butterfly
migrate fantastic
completely grandchild
female milkweed
chemical puzzling
Fantastic facts about the butterfly have been drawing Dr. Taylor’s attention.
The butterflies that return to the south are the great-great grandchildren of the butterflies that left for the north.
When they begin to travel north in spring,the females lay eggs.
Summary
根据句意及首字母提示完成句子.
1. He was ____________ (complete) wrong this time.
2. Linda can’t look after herself and her mother (worry) about her very much.
3. The old woman has three (grandchild). She loves them very much.
4. The strange man always tells us some (fantastic) things which we can’t understand.
5. It’s such a (puzzle) problem that nobody can solve it.
worries
completely
grandchildren
fantastic
puzzling
1. Steve isn’t as ___ as Kelly. He often makes mistakes in his writing.
A．careless B．tidy
C．careful D．difficult
2. Since environment is too important to all of us, we human beings had better ________ fewer trees.
A．turned down B．cut down
C．put down D．cut up
3. There are as ____ as 300 new paintings on show.
A．many B．much C．more D．less
单项选择
GOOD JOB
