Unit 3 Animals Are Our Friends Lesson 17 Save the Tigers ppt课件46张

课件46张PPT。Unit 3Lesson 17Animals Are Our FriendsSave the Tigerscentury
fur
symbol
courage
brave
chainn. 世纪
n. （兽类的）毛
n. 标志，象征
n. 勇气，胆量
adj. 勇敢的，无畏的
n. 链子；链条Words andExpressionsbalance
reason
disappear
kill
cut
decreasen. 平衡，平稳
n. 原因，动机，理由
v. 消失，失踪
v. 杀死
v. 砍，切，剪，割
v. 使……变小；减少Words andExpressionscentury
100yearsNow we are in the 21st century.furThe haven't got much fur yet.puppiesdoveThe is the symbol of peace.brave
If you’re ready to face
danger or pain, you are
brave.The firemen showed great courage in firefighting. They are brave.chain
food chainThe 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?The rainbow is beautiful.Now we can’t see it.
It disappeared.The man is cutting a tree.Be careful. Don’t cut your
fingers.We can cut the cloth with
scissors.Ben thinks he is too fat. He hopes to decrease his weight by eating right and exercising.Save the TigersLead-inLet’s enjoy a video.To know the urgency of protecting tigers
To use the following words and expressions correctly:
century, courage, brave, reason, kill, cut, at the beginning of…,
drop to, food chain, in balance,
in danger, cut down, as wellThink about it!1. Where can you usually see a tiger?
2. Do you think tigers need our help? Why or why not?
3. What can we do to protect wild animals?in a cage?or in the wild?Let’s see the video of a report.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（东北虎）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）Read the lesson and answer the questions.Task 11. How many tigers were there at the beginning of the 20th century?
2. How many tigers are there in the wild today?
3. Where do tigers live?
4. What do tigers look like?
5. What do tigers symbolize?
6. How are tigers described in many stories?
7. What does “at the top of the food chain” mean?
8. What is the reason tigers are important to the environment?
9. Why do people hunt and kill tigers?
10. Aside from their being hunted and killed, what is another reason tigers are disappearing?Reference answer.1. How many tigers were there at the beginning of the 20th century?
Around 100 000.
2. How many tigers are there in the wild today?
The number has dropped to a few thousand.
3. Where do tigers live?
They live in the forests of Asia.4. What do tigers look like?
They usually have orange fur and dark stripes.
5. What do tigers symbolize?
They are symbols of strength and courage.
6. How are tigers described in many stories?
They are brave.7. What does “at the top of the food chain” mean?
Tigers are the king of all the wild animals.
8. What is the reason tigers are important to the environment?
Because tigers help keep the number of other wild animals in balance.
9. Why do people hunt and kill tigers?
They are for money.10. 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 their homes.翻译下列的短语。1.在……之初
2.下降到；跌至
3.食物链
4.保持平衡
5.处于危险状态
6.处于……危险中
把……砍到，减少
7.（出某事某人外）还，也at the beginning of…
drop to
food chain
in balance
in danger
in danger of
cut down
as wellTask 2Read the lesson and match each paragraph with its main idea.BCAAt the beginning of the 20th century, ______________ tigers in the wild was around 100000. But today that number ____________ a few thousand. Tigers are important __ the environment. They help keep the number of other wild animals _________. But in recent years, tigers have been in danger of ___________. Some people ____________ tigers ____ money. We must do something about it.Fill in the blanks and try to retell the text.Task 3the number ofhas dropped toin balancedisappearinghunt and killtoforRead the lesson again and find some sentences to support the main idea of each paragraph. “Save the Tigers” is a volunteer group that hopes to stop the tigers from disappearing.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.
Tigers are important to the environment.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. Tigers are in danger of going extinct. The tiger is at the top of the food chain. It helps keep the number of other wild animals in balance.
1. At the beginning of the 20th century, the number of tigers in the wild was around 100 000.
在二十世纪初期，野生老虎的数量大约是十万只。
the number of意为“……的数量”，它的中心词是number，引导短语作主语时，谓语动词要用单数形式：
The number of the students is over 2000 in our school.
Language points a number of表示“许多、大量的”，相当于many，修饰可数名词复数。作主语时，谓语动词用复数。number前可用large，small等修饰，表示程度。例如：
The number of students in our class is 50.
The number of pages in this book is 60.
A number of students are planting trees on the hill.2. But today that number has dropped to a few thousand.
但是现在，数量已经下降到几千只。
a few thousand表示“几千”。当hundred, thousand前面是基数词one, two, three…a few, many时，其后不加s。当hundred和thousand后面加s时，需要跟of修饰可数名词复数。例如：
There are three thousand students in our school.
Thousands of students are on the square.3. For this reason, tigers are important to the environment.
因为这个原因，老虎对环境很重要。
be important to sb./sth.
……对……来说是重要的。
be important for sb./sth.
对于……来说做……是重要的。
例如:
Time is important to me.
It is important for you to get there early.4. In recent years, tigers have been in danger of disappearing.
在近几年，老虎处于濒临灭绝的危险中。
in danger of意为“处于……危险之中”。例如
You’re in danger of catching a cold.
The sick man is in danger of death.
The passengers are in danger! Let’s go and help!5. As forests disappear, tigers lose their homes.
随着森林的消失，老虎失去了它们的家园。
as在句中作连词，引导状语从句，意为“随着，当……的时候”。
As the sun rose, the fog disappeared.
As she left the room, she remembered that book.Fill in the blanks.1. _____________ students is about twenty. (……的数量)
2. It’s ____________ your health. (对……是重要的)
3. The river is polluted and ___________ going dry.(处于……危险之中)The number ofimportant toin danger of4. ____ time went by, she became more and more beautiful. (随着)
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)AsAt the beginning ofdropped tofood?chainas well Review Lesson 17.
2. Write a short passage about how to protect animals.Homework