人教版九年级全册Unit 13 We are trying to save the earth!-Section A（3a~4c）课件(共16张PPT)

(共16张PPT)
Unit 13
We’re trying to save the earth.
1.残酷的
2.有害的
3.工业
4.法律
5.科学的
6.承担得起
词汇及短语
cruel
一、四会单词
harmful
industry
law
scientific
afford
词汇及短语
二、重点短语
1.对……有害
2.在……顶部
3.食物链
4.参加
5.关掉
6.付费
7.采取行动
be harmful to
at the top of
food chain
take part in
turn off
pay for
take action
课文导学
T:(1)Do you like animals
(2)How do you help protect the endangered animals
Ss:……
3a
Read the passage about sharks and complete the fact sheet below.
Many have heard of shark’s fin soup. This famous and expensive dish is especially popular in southern China. But do you realize that you’re killing a whole shark each time you enjoy a bowl of shark’s fin soup
When people catch sharks, they cut off their fins and throw the shark back into the ocean. This method is not only cruel, but also harmful to the environment. Without a fin, a shark can no longer swim and slowly dies. Sharks are at the top of the food chain in the ocean’s ecosystem. If their numbers drop too low, it will bring danger to all ocean life. Many believe that sharks can never be endangered because they are the strongest in their food chain. But in fact, around 70 million sharks are caught and traded in this industry every year. The numbers of some kinds of sharks have fallen by over 90 percent in the last 20 to 30 years.
3a
Read the passage and answer the questions.
Environmental protection groups around the world, such as WildAid and the WWF, are teaching the public about “finning”. They have even asked governments to develop laws to stop the sale of shark’s fins. So far, no scientific studies have shown that shark’s fins are good for health, so why eat them Help save the sharks!
In southern China.
Around 70 million sharks
Over 90 percent
They are WildAid and
the WWF.
Read the passage again and fill in the blanks with the words in the box.
3b
when
so
but
Although
if
Grammar Focus
We’re trying to save the earth. Present progressive
The river used to be so clean. used to
The air is badly polluted. Passive voice
No scientific studies have shown that shark fins are good for health. Present perfect
We should help save the sharks. Modal verbs
Fill in the blanks with the correct forms of the verbs in brackets.
4a
Have taken
helped
considered
has had
took
think
came
trying
wait
Fill in the blanks with the appropriate modal verbs from the box.
4b
can
would
could
have to
should
must
may/
might
may/might
must/have to
can/could/should/may/might
can/could/should/may/might
have to
can/could
can/could
can/could
would/can/could
Make a list of things that people can do to help the environment and discuss your list with your partner.
4c
Key points
1.harmful
harmful为形容词。意为“有害的”。常用作be harmful to，意为“对……是有害的”，与be bad for为同义词。
Smoking is bad for your health.
吸烟对健康是有害的。
【拓展】①harm n.危害。常用作do harm to，意为“对……有害”。
②harm v.有危害。常用作harm sb./sth.，意为“对……有害”。
Reading in the sun does harm to your eyes.
=Reading in the sun harms your eyes.
在阳光下看书对你的眼睛有害。
Key points
2.afford
afford为动词，意为“承担得起；负担；提供”。用法如下：
(1)与 can, be able to等连用，表示“担负得起”某事或某物的费用、损失、后果等，或表示“抽得出”时间等，后面通常可接名词、代词、不定式等（多用于否定句或疑问句）。
I can’t afford (to buy)a new coat.
我没钱买件新外衣。
He can’t afford the time for it.
他抽不出时间来做此事。
He says he really can’t afford to wait another day.
他说他确实一天也不能再等了。
（2）表示“提供”“给予”，其后可以接双宾语（直接宾语通常为抽象概念），若双宾语交换位置，要用介词 to（此时无需连用 can, be able to等）。
His visit affords us great pleasure.
=His visit affords great pleasure to us.
他的来访给我们带来极大的快乐。
Key points
4.This method is not only cruel, but also harmful to the environment.
这种方法不仅残酷，而且对环境有害。
not only…but also…意为“不仅……而且……”，用于连接两个表示并列关系的成分，着重强调后者，其中的also有时可以省略。
She not only plays well, but also writes music.
她不仅很会演奏，而且还会作曲。
Not only men but also women were chosen.
不仅仅是男的，女的也有被选中的。
He works not only on weekdays but on Sundays as well.
他不仅平时工作，星期日也工作。
注意：①若连接两个成分作主语，其谓语通常与靠近的主语保持一致。
Not only you but also he has to leave.
不只是你，他也得离开。
②若连接两个句子，not only后面的句子要用倒装。
Not only did he speak more correctly, but he spoke more easily.
他不仅说得更正确，而且讲得更不费劲了。
1.如果他们（鲨鱼）的数量降至过低，会给所有海洋生物带来危险。
If their numbers , it will bring danger to all ocean life.
2.没有科学研究表明鲨鱼的鳍对健康有利。
No have shown that shark fins are good for health.
3.这种方法不仅残酷，而且对环境有害。
This method is cruel, harmful to the environment.
4.在最近的20年到30年的时间里，这种鲨鱼已经下降了90%。
The numbers of some kinds of sharks over 90 percent in the last 20 to 30 years.
5.我们不能再等待更长的时间来采取行动！
We to wait any longer to !
drop too low
scientific studies
not only but also
have fallen by
can’t afford take action