Unit 13 We're trying to save the earth SectionA 2d-3a课件（32张PPT）

Unit 13
We’re trying to save the earth.
(2d-3a)
1.How many people are being interviewed? Who are they?
_______________________________
2.What kinds of pollution are talked about in the interview?
_______________________________
一、阅读课本第98页2d，回答问题。
Two. They are Jason and Susan.
Air pollution and waste pollution.
2d
二、阅读课本第98页2d，完成下列表格。
{5940675A-B579-460E-94D1-54222C63F5DA}Ideas for solving the problem
Pollution
Air pollution
Waste pollution
Jason’s
1._____________________________________________.
2.___________________________________________________________.
Susan’s
3.______________________________________________________________.
4.______________________________________________________________________.
Take the bus or
Never take wooden
Ride a bike
Bring a bag to go shop -
subway instead of
driving
plastic forks
chopsticks or
clean and beautiful for everyone
ping; throw rubbish in
the bins and keep public
课文导学
1. … to cut down air pollution, we should take the bus or
subway instead of driving.
……要想减少空气污染的话，我们应该乘坐公共汽
车或者地铁，而不是开汽车。
(1)在句子的开头用 to do sth. 的短语，并用逗号将其
与句子主体部分隔开，相当于汉语“(若)要做……
的话”。
(2)cut down意为“减少，缩短，砍倒”。如：
We are constantly being reminded to cut down our fat
intake.
不断有人提醒我们要减少脂肪的摄入量。
有关cut的常用短语还有：
cut up 切开，切碎，抨击 cut off 切除，切断，中断
如：Cut up the carrots before you put them into the pot.把胡萝卜切碎后再放入锅内。
The exiles had been cut off from all contact with their homeland. 流亡者被切断了与家乡的所有联系。
知识拓展
即学即练
( )(1)______ English well, you have to practice speaking English every day.
A. Learn B. Learning C. To learn D. Learns
( )(2)_______ to world news, please key in “1”.
A. Listen B. To listen C. Listening D. Listens
( )(3)Great efforts have been made to ________ the government expenses (成本) to the certain level.
A. cut down B. cut short C. cut out D. cut off
C
B
A
2. It’s good for health and it doesn’t cost anything! 这(骑自行车)有益于健康，而且不花钱！
be good for 对……有好处
知识拓展
辨析：be good at, be good with 和 be good to
(1)be good at 意为 “擅长……”，后面接名词、代词或动词-ing形式。
如：I’m good at playing chess. 我擅长下象棋。
(2)be good with意为“灵巧的；与……相处得好”。
如：She is good with her hands. 她手很巧。
Lily is very good with the children. 莉莉与孩子们相处得很好。
(3)be good to意为“对……友好”。
如：My friend was good to me when I am in trouble. 在我遇到麻烦时，我的朋友对我很好。
即学即练
( )(1)— What do you think _____ us to learn English?
— Reading more and listening more are very useful.
A. is good for B. is good to C. good for D. good to
( )(2)Jim _____ telling funny stories. He can always make people laugh.
A. is good to B. is good at
C. is good for D. is good with
A
B
3. … remember to throw rubbish in the bins and keep public places clean and beautiful for everyone.
……记得要把垃圾丢进垃圾桶里，为每一个人保持公共环境的干净和漂亮。
remember to do sth. 记得去做某事(未做)
如：Please remember to bring your homework to school tomorrow.
明天请记得把作业带来学校。(未带作业)
知识拓展
remember doing sth. 记得做过某事(已做)
如：I remembered turning off the lights when I left the room.
我记得当我离开房间的时候，我关灯了。(灯已经关了)
forget to do sth. 忘记要去做某事 (未做)
forget doing sth. 忘记做过某事(已做)
如：She forgot to wear the school card this morning. 她今天早上忘记佩戴校卡了。
I forget borrowing an English book from my friend.
我忘记从朋友那里借了一本英语书。
即学即练
( )(1)Please remember ______ off the light when you leave the room.
A. turning B. to turn C. to turning D. turn
( )(2)Tom,don't forget ____ the book to Bob. He may need it soon.
A. give B. giving C. to give D. gives
B
C
Lead in
There are some animals are endangered.
big
strong
cruel
scary
dangerous
ugly
/kru:?l/
adj.残酷的，残忍的
Brainstorm
Why are they endangered?
shark fins
shark fin soup
Sharks are at the top of the food chain in the ocean’s ecosystem.
A food chain
[t?e?n]
n.链子，链条
在…的顶端
[?i:k??s?st?m]
n.生态系统
We should do something to protect the animals and the environment!
Save the earth!
Save the animals!
Read the passage quickly, especially the first and last sentences in each paragraph and match the main ideas
Para. 1
Para. 2
Para. 3
Environmental protection groups
are against “finning”.
Some basic facts about shark fin soup.
基本事实
Sharks are endangered, because of people's killing.
Fast reading:
割鳍行为
①Shark fin（鱼鳍）soup is popular all around the world.
②You’re killing a whole shark when you enjoy a bowl of shark fin soup.
careful reading
Read Paragraph 1 and judge(判断) the sentences.
F
T
×
√
2
in southern China
Read Paragraph 2 and fill in the blanks
1. People _____ ____ sharks’ fins and throw the sharks back into the ocean. 2. This is not only cruel but also __ ___the environment.
3.Sharks are __ __ __ of the food chain in the
ocean’s ecosystem.
4.The number of sharks are caught and traded every
year is around _________
5.The numbers of some kinds of sharks __ ___ by over 90 percent in the last 20 to 30 years.
cut
off
harmful
to
at
the
top
have
fallen
70 million
adj 有害的
Read Paragraph 3 and answer the two questions.
1.two environmental groups against “finning”.
2.How can governments help?
They can develop laws to stop the sale of sharks' fins
WildAid and the WWF
请根据课本3a完成短文填空。 Many people have heard of shark fin soup.This dish is especially 1. in southern China.Do you realize that you are killing a whole shark 2. time you enjoy a bowl of shark fin soup? When people catch sharks，they cut off
3. fins and throw the sharks back into the ocean.This is not only cruel，4. also harmful to the environment.Sharks are 5. the top of the food chain in the ocean's ecosystem.If their numbers drop too low，it will bring 6. to all ocean life.The numbers of some kinds of sharks have 7. by over 90 percent in the last 20 to 30 years.Environmental protection groups are teaching the
8. about“finning”．They have 9. asked governments to develop laws to stop the 10. of shark fins. Help save the sharks!
famous /popular
each
their
but
at
danger
fallen
even
sale
public
sharks are not the only animals that are endagered. Many other animals such as elephants,pandas, tigers are endangered too.
Why are the animals endangered?
What can we do to save the animals?
air pullution
greenhouse effect (温室效应)
global warming ,glacier melting （全球变暖，冰川融化）
trees were cut dowm ,animals lost their homes
killing
protect the trees ,plant more trees
stop killing
cut down air pollution
Groupwork
when the buying stops, the killing can too.
课文导学
1. Without a fin, a shark can no longer swim and slowly dies.
在没有鱼鳍的情况下，鲨鱼就不能再游动，然后慢慢死去。
(1)Without + 名词 在没有……的情况下
如：Without water, we cannot live. 没有水，我们就活不了。
(2)no longer ( = not … any longer) 意为“不再……”，表示某种状态或动作在时间上不再持续下去。
如：I can’t wait any longer. 我不能再等了。
知识拓展
no more ( = not … any more) 意为“不再……”，表示在动作次数和程度上不再发生。
如：Time or opportunity lost will return no more. 机不可失，时不再来。
即学即练
( )(1)— Excuse me. Is this Mr. Brown’s office?
— I’m sorry, but Mr. Brown ____ works here. He left about three years ago.
A. not longer B. no more C. not still D. no longer
( )(2)I am a little drunk. I can’t drink ____.
A. any longer B. any more C. no more D. no longer
D
B
2. If their numbers drop too low, it will bring danger to all ocean life.
如果它们(鲨鱼)的数目降至过低，会给所有海洋生物带来危险。
numbers表示全球海洋中鲨鱼的总量。当用形容词描述number表示数值的高或低时，要用 high 或 low 修饰。用法类似的还有 price 和 voice。
如：The price of this book is high / low.
这本书的价格高 / 低。
Your voice is very high / low. 你的音调很高 / 低。
常与number搭配的动词有 grow，fall 等。
如：The number of people who own laptops has been growing quickly recently.
近来拥有手提电脑的人数增长很快。
The number of smokers has fallen by 30% this year. 今年烟民的数量降低了30%。
知识拓展
即学即练
( )(1)The number of families who own cars ____ quickly recently.
A. has been growing B. have been growing
C. has grown D. have been grown
( )(2)The goods in this shop are _____. The price of everything is so ____.
A. expensive; low B. expensive; high
C. cheap; high D. low; cheap
A
A
3. The numbers of some kinds of sharks have fallen by over 90 percent in the last 20 to 30 years.
在过去的20年到30年里，某些种类的鲨鱼的数目已经减少了90%以上。
the number of 意为“……的数目”，数目算一个整体，其后面的谓语动词用单数形式。
如：The number of the students in this class is 44. 这个班学生的数目是44人。
注意：课文中“the numbers of some kinds of sharks”意为 “某些种类的鲨鱼数目”，所以是复数概念。
知识拓展
a number of 意为“大量的……” ，相当于a lot of一类，后面接复数名词，其后面的谓语动词用复数形式。
如：We have lived here for a number of years. 我们住在这里好些年了。
即学即练
( )— A number of students ____ in the dining hall.
— Let me count. The number of the students ___
about 100.
A.are；is B.is；are C.are；are D.is；is
B
Thank you!