冀教版英语九年级上册 Unit 5 Lesson28 The Study of Living Things 课件 (共19张PPT)

(共19张PPT)
Lesson 28
The Study of Living Things
Do you know him
Leading in
He is Darwin，
a British biologist.
Do you like biology
Yes,we do!
Leading in
Leading in
Do you like the butterflies
Yes.They are very beautiful!
Leading in
Do you know this kind of butterfly
美洲王蝶是栖息在北美地区的一种色彩斑斓、身体硕大的蝴蝶。每年10月底至来年3月初，上亿只美洲王蝶从美国东北部和加拿大南部飞越4500多公里来到温暖的墨西哥中部林区越冬和繁衍。
Learning aims
1. To learn some new words:
biology，fantastic, butterfly……
2. To understand the passage.
3. To learn Attributive clause.
Words and
Expressions
biology n.
butterfly n.
migrate v.
fantastic adj.
completely adv.
grandchild n.
female n.
milkweed n.
chemical n.
puzzling adj.
生物
蝴蝶
迁徙; 移居
奇异的
完全地
孙子(女)；外孙(女)
雌性
马利筋（一种植物）
化学物质
令人费解的
1. In the United States and Mexico, farmers use chemicals that kill milkweed.
2. Do the females lay eggs on only one plant
________________________________.
3. What does Dr. Chip Taylor study
_______________________________________________.
4. Here, as many as ___________ butterflies spend the winter.
5.In Mexico, the butterflies always return to the same small piece of forest, which is only_________________.
___________________________________________
Listen to the lesson and finish the exercise.
F
Yes, they do.
He studies one kind of North American butterfly
230 million
T
√
20 kilometers wide
Read the lesson and complete the table.
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.
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　 milk weed.
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
return
spend
kill
find
lay
rest
1
原文呈现
Dr. Chip Taylor teaches biology at a university in the United States. He studies one kind of North American butterfly. Just like amigrating bird, this butterfly travels about 4 000 kilometres south in fall. Fantastic facts about the butterfly have been drawing Dr. Taylor’s attention.
In Mexico, the butterfies always return to the same small piece of forest, which is only 20 kilometres wide. Here, as many as 230 million butterflies spend the winter. They can cover some trees almost completely.
have been doing sth.是现在完成进行时,意为“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。
as…as…意为“与……一样……”,两个as之间可加形容
词或副词的原级;也可加“many+复数名词”,“much+不
可数名词”或“形容词+a/an+单数名词”,还可以在
as…as…前加twice,half等词表示前后者倍数或分数关系。
as…as的否定形式为not as/so…as…。
spend为及物动词,意为“度过,花(钱/时间)”,
常用于固定结构:spend time/money(in)doing sth.花费时
间/金钱做某事;
spend time/money on sth.在某物上花费时间/钱;
spend time with sb.和某人一起度过时光,句子的主语应
为人,spend的过去式和过去分词都是spent。
原文呈现
The butterflies that return to the south are the great-great grandchildren of the butterfies that left for the north. When they begin to travel north in spring, the females lay eggs. They lay eggs on only one plant: milkweed.
But in Mexico, people cut down the trees that the butterfies need to rest on because they want more land for farming. In the United States and Canada, farmers use chemicals that kill milkweed. This worries Dr. Taylor a lot.
Now things are improving. Mexico has begun to protect parts of its forests.
that return to the south是定语从句。定语从句是指在句
中作定语的从句。
先行词：是被定语从句所修饰的词 （通常是名词或代
词）
关系词的作用：
1.引导定语从句
2.在从句中替代先行词，在定语从句中充当一定的成分，
通常是主语或宾语，作宾语时常可以省略。
定语从句：先行词+关系词(that/which/who)+从句
特殊情况下，由that引导的定语从句：
1.先行词为all, everything, nothing, something, anything, little, much 等不定代词时。
2. 先行词被all, little, much, every, no 等修饰时。
3. 先行词被序数词或最高级修饰时。
4. 先行词被the only, the very, the same, the last修饰时。
5. 先行词为人和物的组合。
6. 主句是who/which开头的特殊疑问句。
原文呈现
The United States and Canada have encouraged farmers to use fewer chemicals.
Scientists still don’t understand how the butterflies know when to fly south. If they are even a few days late, they will freeze. And how do all the great-great grandchildren find the same forest in Mexico every year This is both puzzling and interesting for many scientists.
There are many mysteries yet to be discovered by those interested in science.Would you like to study biology
when to fly south意为“什么时间飞往南方”,是“特殊疑
问词+动词不定式”结构。“疑问词+动词不定式”结构
实质上是一个名词性结构,它可以改为一个宾语从句。此
时从句与主句的主语是一致的。
both…and…意为“……和……”,用于连接两个并列成分。
both…and…连接两个并列成分作主语时,谓语动词使用
复数形式。both…and…的同义词组为
not only…but(also)…,意为“不仅……而且……”,反义词
组为neither…nor…,意为“既不……也不……”。
Join the sentences to make attributive clauses.
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.
______________________________________________________________
I asked him to mail the letter which/ that/不填I wrote to my cousin.
A boy who/that/whom I met yesterday is a new member in our art club.
2
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.
____________________________________________________________________
Mary was carrying a bag which/that cost her a lot of money.
Football is a team sport which/that is popular all over the world.
Join the sentences to make attributive clauses.
2
Work in groups of three to play a game.
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
4
1. Dr.Chip Taylor is ____________(biology).
2. This cross word ___________(puzzling) is hard to do .
3. My mother took some ____________ (freeze) meat from the fridge.
4.He has___________(complete)forgotten the place
5. My black hen____________ (lay) an egg yesterday
frozen
Ⅰ.用括号中所给词语的适当形式填空。
biologist
puzzle
completely
laid
Exercise
Ⅱ .请给下列的定语从句补充引导词。
1. Who is the girl _____ talked to you yesterday.
2. Look at the photos ____________ I took on my trip.
3. It successfully shows the rich culture_____________
makes Beijing so famous.
4. The photo____________ we liked best was taken by
Zhao Min.
5. His father is the person_____________ will be most
unhappy.
6. Tom is the boy ________ we saw in the shop.
that
that/which
that/which
that/who
that/which
that/who
Exercise
Homework:
1. Preview the words and expressions in Lesson 29.
2. Research and write a report about an animal or insect that you think is fantastic. Include a drawing or image of the animal or insect.
Thank you!