UNIT3 Lesson 17 教学课件--冀教版初中英语八年级下

(共41张PPT)
Lesson 17: Save the Tigers
UNIT 3 Animals Are Our Friends
学 习 目 标
掌握单词：century, courage, brave, reason, kill, cut
接触单词：fur, symbol, chain, balance, disappear, decrease
短语：at the beginning of…, drop to, food chain, in balance, in danger,
cut down, as well
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3
保护野生动物，爱护环境。
能用英语谈论保护老虎的话题。
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课 堂 导 入
Guess Game
It usually has orange fur（毛） and dark stripes（条纹）.
It is the king in the animal world.
What animal is it
How many types of tigers do you know
There are currently six types of tigers: the Bengal tiger,
the Siberian tiger,
the Sumatran tiger,
the Malayan tiger,
the Indochinese tiger and
the South China tiger.
the Bengal tiger(孟加拉虎)
the Siberian tiger（西伯利亚虎）
the Sumatran tiger（苏门答腊虎）
the Malayan tiger （马来亚虎）
the Indochinese tiger（印度支那虎）
the South China tiger（华南虎）
Think About
Where can you usually see a tiger
Do you think tigers need our help Why or why not
New words
课 堂 学 习
century
=100 years
Now we are in the 21st century.
fur
（兽类的）毛
The tiger’s fur is very
beautiful.
dove
The is the symbol of peace.
symbol
象征
brave
勇敢的，无畏的
The firemen showed great courage in firefighting. They are brave.
courage
勇气，胆量
chain
food chain
The shark is at the top of the sea food chain.
balance
If the stones are not in balance, they will fall.
You didn’t go to the party. Could you tell me the reason
reason
原因，理由
The rainbow is beautiful.
Now we can’t see it.
It disappeared.
disappear
消失，失踪
The tiger wants to kill the cow.
kill
杀死
He is cutting fruit.
People should decrease the amount of fat they eat.
decrease
减小，使……变小
Read aloud the new words.
Read aloud the new words.
Practice with the new words
century fur symbol brave courage chain
balance reason disappear cut decrease
We paper with scissors.
I’d like to know the why you love your pet dog so much.
The plane flew higher and higher till it in the sky.
The tiger is the symbol of .
The man jumped into the cold river and save the boy.
The number of the tigers in the wild quickly these years.
Our life has become better in the 21st ______.
The ___ on the bear is dark brown.
The little girl wears a gold _____ around her wrist(手腕).
cut
reason
disappeared
brave
decreases
century
courage
fur
chain
Reading
Read the lesson and match each paragraph with its main idea.
B
C
A
Read the lesson again and find some sentences to support the main idea of each paragraph.
Save the Tigers
Paragraph1
Paragraph 2
Paragraph3
“Save the tigers”is a group of volunteers. These volunteers hope to save the tigers of the world. At the beginning of the 20th century, the number of tigers in the wild was around 100 000. But today that number has dropped to a few thousand.
“Save the Tigers” is a volunteer group that hopes to stop the tigers from disappearing.
Paragraph1
Tigers are important to the environment.
Tigers live in the forests of Asia. They usually have orange fur and dark stripes. Tigers are symbols of strength and courage. In many stories, they are brave. The tiger is at the top of the food chain. It helps keep the number of other wild animals in balance. For this reason, tigers are important to the environment.
Paragraph 2
Tigers are in danger of going extinct.
In recent years, tigers have been in danger of disappearing. Some people hunt and kill tigers for money. People have cut down a lot of trees as well. As forests disappear, tigers lose their homes. The number of tigers in the wild is quickly decreasing and we must do something about it.
Paragraph 3
Read the lesson and answer the questions.
How many tigers were there at the beginning of the 20th century
2. Where do tigers live
3. What do tigers symbolize
Around 100 000.
They live in the forests of Asia.
They are symbols of strength and courage.
4. What is the reason tigers are important to the environment
5. Why do people hunt and kill tigers
6. Aside from their being hunted and killed, what is another
reason tigers are disappearing
People have cut down a lot of trees as well. As forests disappear, tigers lose the homes.
They are for money.
Because tigers help keep the number of other wild animals in balance.
Read, find and translate
at the beginning of __________________
the number of … __________________
drop to _________________
be symbol of ..._____________________
at the top of… _________________
food chain __________________
in balance __________________
in danger _________________
cut down __________________
as well __________________
在……之初
……的数量
下降到；跌至
是……的象征
在……的顶端
食物链
保持平衡
处于危险状态
把……砍倒，减少
（除某事某人外）还，也
Project
Work in groups and discuss some ways we can protect animals. Write down your ideas.
Language points
At the beginning of the 20th century, the number of tigers in the wild was
around 100 000.在20世纪初，野生老虎的数量大约是10万只。
辨析: the number of与a number of
(1)the number of意为“……的数量”, 后接可数名词复数,但中心词是
number, 所以若作主语，则谓语动词要用单数。
(2)a number of意为“许多; 大量”, 相当于a lot of或lots of, 中心词是该短语
所 修饰的可数名词复数, 所以作主语时, 谓语动词用复数形式。
The number of students in our school is about 2 000.
在我们学校，学生的数量是大约2000人。
A number of students like playing basketball after school.
放学后许多学生喜欢打篮球。
2. It helps keep the number of other wild animals in balance.
它帮助保持其他野生动物的数量平衡。
balance在句中用作名词, 意为“平衡; 均衡”, 常用短语有：
in balance 保持平衡 be out of balance 不平衡
keep/lose one’s balance 保持/失去平衡
The boy keeps the see-saw in balance.
这个男孩让跷跷板保持平衡。
You must learn to keep your balance in skating.
在滑冰时你必须学会保持平衡。
I lost my balance and fell. 我身体失去平衡，摔了一跤。
3. In recent years, tigers have been in danger of disappearing.
近年来, 老虎已经面临消失的危险。
in danger of 意为“处于……危险之中”。
You’re in danger of catching a cold. 你有感冒的危险
The sick man is in danger of death.
那个病人有死亡的风险。
The passengers are in danger! Let’s go and help!
旅客们处于危险之中，咱们去帮忙！
课 堂 达 标
根据汉语提示完成句子。
1. _________________ students is about twenty. (……的数量)
2. It’s _______________ your health. (对……是重要的)
3. The wild animals are ___________now. Let’s protect them.
（处于危险中）
4.They ______________ a tree to make furniture. （砍倒）
5. ____________________ the party, he gave me a gift. (在……之初)
6. The temperature has _____________ below zero. (下降到)
7. It is at the bottom of the ______________. (食物链)
8. You know, computers bring troubles _________. (也)
The number of
important to
in danger
cut down
At the beginning of
dropped to
food chain
as well
Recite the new words and expressions.
2. Preview Lesson 18.
Homework
Thank you !