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(共20张PPT)
沪教牛津版八年级下册
主题范畴：人与自然
Speaking
Key question
Unit 5
Saving animals in danger
What can we do to protect animals in danger
Do you know some endangered animals in the world
白鳍豚(Baiji, Yangtze River Dolphin)
白暨豚种群数量很小，为我国特有的珍稀水生兽类，分布于长江中下游的干流，洞庭湖、鄱阳湖和钱塘江口一带。它们大约在长江生活了2500万年，被誉为“长江中的大熊猫”，具有“活化石”之称。现被列入中国《国家重点保护野生动物名录》一级。
北部白犀牛(Sumatran rhinocerous)
刚果瓜兰巴(Garamba)国家公园拥有世界仅存的
不足25只的北部白犀牛，北部白犀牛将可能在
地球上彻底消失。
西伯利亚虎 Siberian tiger
西伯利亚虎，又称东北虎，曾经广泛遍布于中国东北、朝鲜半岛、蒙古等地区。现被列入中国《国家重点保护野生动物名录》一级。据估计，现存东北虎仅有500头。
S1: What should we do to protect some sea animals in danger
S2: We must keep the oceans clean. For example, we mustn’t throw rubbish into the sea when we are on the beach. Plastic rubbish can kill sea animals.
S1: What else should we do
S2: We should write to factories and ask them to stop polluting the sea. And if they break the law, the government should punish them.
S1: Good idea!
Talking about animal protection
Two students are talking about animal protection. Read the dialogue and learn how to talk about obligations. Pay attention to the expressions in blue.
Modal verbs like “should” and “must” are used to talk about obligations
Talking about obligations
should / ought to和must表达义务或责任。
should / ought to：应该
否定式：should not/ ought not to 不应该
must：必须
否定式：must not：禁止
在表示义务或责任时，should比must略轻一些。
We can ask people for obligations like this:
We can talk about obligations like this:
What should / must I / you / he / she / we / they do about the dirty river
What ought to do about the dirty river
I / You / He / She / We / They should / must / ought to clean up the rubbish in the river
shouldn’t / mustn’t / oughtn’t to throw rubbish into the river
What mustn’t we do when we are on the beach
We mustn’t throw rubbish into the sea.
What should we do to protect the sea animals in danger
We must keep the oceans clean. We should write to factories and ask them to stop polluting the sea.
What else should we do to protect the sea animals
We must make laws to protect the sea. We should also call on our family and friends to …
Read the dialogue again and then answer the questions.
You must do something.
→ It is necessary / important for you to do something.
You mustn’t do something.
→ It is wrong of you to do something.
You should do something.
→ It is right for you to do something.
Tip
How to protect the sea animals
We must keep the oceans clean.
We should write to factories and ask them to stop polluting the sea.
It is important for us to keep the oceans clean.
It is right for us to write to factories and ask them to stop polluting the sea.
How to protect the giant pandas
Protect the home of ...
Bring pandas to …
Make laws to …
We must ... / It is important to ...
We should .../It is necessary to ...
We should ... / It is right to ...
Talking about obligations
An obligation is something we must do because we have promised to do it, or because it is right to do. Here are some common ways of talking about obligations:
What shoud / must we do to ...
We should / ought to / must ...
We shouldn’t / oughtn’t to / mustn’t ...
We need to / have to ...
We need to help each other.
（我们应该互相帮助——主观判断）
We have to pay taxes.
（我们必须交税——法律要求）
Work in pairs. Choose one animal from Exercise 1 on page 68 and discuss what we can do to protect it. Use the questions below to help you.
Which animal are you going to talk about
What dangers does it face
How should we protect it
Animals Dangers they face Ways to protect them
Giant panda climate change, habitat loss, … Protect the home of the giant panda.
Bring pandas to breeding centres.
Make laws to protect pandas.
African lion
Asian elephant
Polar bear
Red-crowned crane
South China tiger
I want to talk about ...
They are in danger because ...
We should / must ...
I want to talk about giant pandas. This species is in danger because of climate change.
First, we must do our best to protect their home. We should also try to bring more pandas to breeding centres to make sure they have babies. Finally, the government should make laws to protect the giant panda and its habitat.
For example:
Imagine you are an animal in danger. Give a short speech and explain who you are, and what humans can do to protect your species. Talk about the points below.
Threats
...
Habitat
I am a ...
Ways to protect
Life
Food
Hope
I am a South China tiger. My family and I live in the forests of southern China. I usually go hunt alone at night, and I catch animals like deer and wild pigs.
South China tigers can usually for about 10 to 15 years in the wild. However, we are facing a lot of problems in our lives. Our biggest problem is that we are losing our home. People cut down trees to build farms and cities. In the past, many tigers were also hunted illegally.
Luckily, the government has now built nature reserves and made laws to protect us. I hope people can do more to help keep us safe.
For example:
https://www.21cnjy.com/help/help_extract.php
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Thanks!

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