外研版（2019）高中英语选择性必修第二册 Unit5 Understanding ideas 公开课课件(共47张PPT)
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| 名称 | 外研版（2019）高中英语选择性必修第二册 Unit5 Understanding ideas 公开课课件(共47张PPT) |  | |
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| 资源类型 | 教案 | ||
| 版本资源 | 外研版（2019） | ||
| 科目 | 英语 | ||
| 更新时间 | 2023-03-03 23:03:43 | ||
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(共47张PPT)
Understanding ideas
Unit 5 A delicate world
目录页
contents
Pre-reading
I
Language points
Ⅳ
Fast reading
II
Homework
Ⅴ
Intensive reading
III
VI
Post-reading
Ⅰ
Pre-reading
Pre-reading
Look at the picture and answer the questions.
1. What animals can you see in
the picture
Students’ own answers.
Pre-reading
Look at the picture and answer the questions.
2. What kind of changes would
take place if cats, rats and
rabbits were introduced to an
environment like this
They would hunt the birds and eat the native vegetation, thus upsetting the local ecological balance.
Background Information
Pre-reading
Macquarie Island – UNESCO World Heritage Centre
Macquarie Island (34 km long x 5 km wide) is an oceanic island in the Southern Ocean, lying 1,500 km south-east of Tasmania and approximately halfway between Australia and the Antarctic continent. The island is the exposed crest of the undersea Macquarie Ridge, raised to its present position where the Indo-Australian tectonic plate meets the Pacific plate. It is a major
Background Information
Pre-reading
geoconservation significance, being the only place on earth where rocks from the earth’s mantle (6 km below the ocean floor) are being actively exposed above sea-level. These unique exposures include excellent examples of pillow basalts and other extrusive rocks.
Ⅱ
Fast reading
Fast reading
Read the passage and find out what happened to Macquarie Island.
Non-native species introduced to Macquarie Island attacked native birds, and led to a substantial reduction of bird population and even the extinction of parakeets. In addition, non-native species ate and devastated the native
Fast reading
Read the passage and find out what happened to Macquarie Island.
vegetation. All of this played a part in upsetting the natural harmony of the island. But now the island’s ecology is on the road to recovery with human efforts.
Fast reading
Choose the author’s purpose in writing the passage and give your reasons.
1. To analyse how Macquarie Island was saved from destruction.
2. To inform readers of the chaos caused on Macquarie Island by
humans.
3. To entertain readers with a funny story about what happened
on Macquarie Island.
4. To suggest ways in which an ecosystem can be protected.
Fast reading
Choose the author’s purpose in writing the passage and give your reasons.
Para 2: ... It’s a tragic story that began in 1810 when humans arrived on the island ...
Para 6: So, I am here on Macquarie Island to participate in the programme to track this problem. The first step ...
Many examples also give clues to the author’s purpose in writing the passage.
III
Intensive reading
Intensive reading: Find detailed information
Organize information from the passage and complete the flow chart.
To live there.
Rats and mice were brought there by accident, and
they took over the island, eating the birds’ eggs and attacking baby birds.
ACTION(S)
PURPOSE(S)
RESULT(S)
Humans arrived on Macquarie Island.
Intensive reading: Find detailed information
Organize information from the passage and complete the chart.
Cats were brought to the island.
To control the rats and mice.
The cats developed an appetite for the birds.
ACTION(S)
PURPOSE(S)
RESULT(S)
Intensive reading: Find detailed information
Rabbits were introduced to
the island.
To provide food for humans.
the exploding rabbit population provided plentiful food for the cats. This led to more cats hunting the birds. As a result, parakeets died out in 1891.
Organize information from the passage and complete the chart.
ACTION(S)
PURPOSE(S)
RESULT(S)
Rabbits multiplied and caused soil erosion, and
Intensive reading: Find detailed information
A virus was released onto the island.
To remove all the rabbits from the island.
Substantial reduction of rabbit population led to cats killing more native birds.
Organize information from the passage and complete the chart.
ACTION(S)
PURPOSE(S)
RESULT(S)
Intensive reading: Find detailed information
Traps and dogs were used.
To catch the cats.
Organize information from the passage and complete the chart.
ACTION(S)
PURPOSE(S)
RESULT(S)
The departure of the cats resulted in an increasing population of rats and mice. And the rabbit population exploded once again.
Intensive reading: Find detailed information
Poison and dogs were used.
To remove all the remaining invading species.
The island was pest-free and its ecology is on the road to recovery.
Organize information from the passage and complete the chart.
ACTION(S)
PURPOSE(S)
RESULT(S)
Ⅳ
Post-reading
Now talk about how human interference led to such severe consequence for Macquarie Island.
Post-reading: Think and share
What is your understanding of “... we humans owe it to the island to give it a happy ending”
Post-reading: Think and share
Share your own answers.
2. Do you think it was right to eradicate the “pests”
from Macquarie Island Give your reasons.
Post-reading: Think and share
Share your own answers.
3. How could similar situations be avoided in the
future
Post-reading: Think and share
To avoid similar situations in the future, we should protect the natural ecosystem and be aware of the potential impact that human activities can have on ecosystems.
4. What language can you use to talk about cause
and effect How would you apply it to your
reading and writing
Post-reading: Think and share
Share your own answers.
Language points
Ⅴ
1）设陷阱捕捉；夹住；卡住
Eg: It’s cruel to trap birds.
捕鸟是残忍的。
2）把……困住；使陷入困境
Eg: Having been trapped in traffic, he was late for work.
因为交通堵塞，他上班迟到了。
Language points: Important words
1. trap v. （trapped, trapped）
Language points: Important words
trap n. 1) 陷阱；夹子；罗网
set a trap for mice 设夹子捉老鼠
2) （陷害人的）圈套；诡计
fall into a trap 落入圈套
3) 牢笼；困境
Some people feel that marriage is a trap.
有人认为婚姻是牢笼。
Language points: Important words
n. drama
adj. dramatic
[C]（一出）戏；戏剧性事件
[U] 戏剧；戏剧艺术；戏剧文学
1. 戏剧的；戏剧性的
the dramatic arts 戏剧艺术
2. 突然的
a dramatic increase 剧增
3. 给人印象深刻的
a dramatic victory 激动人心的胜利
adv. 显著地；戏剧地；引人注目地
2.
dramatically
3. harmony n. 和谐；和睦；融洽
Language points: Important words and expressions
In this heavenly world, people live in perfect harmony with nature.
在这天堂般的世界里，人与自然和谐相处。
harmonious adj. 和谐的；和睦的；
harmonious society 和谐社会
The “Chinese Dream” is a dream to improve people’s well-being and a dream of harmony, peace and development.
中国梦是提高人民幸福感的梦，是和谐、和平与发展的梦。
4. explode v.
Language points: Important words and expressions
The firework exploded in his hand.
那个爆竹在他手里响了。
2) （感情、暴力事件）爆发；激增
explode with anger 勃然大怒
Florida’s population exploded after World War Ⅱ.
二战后，佛罗里达州的人口迅速增加。
1) 使爆炸
explode a bomb 引爆炸弹
1. fail to do sth
2. in harmony with
3. develop an appetite for
4. be introduced to
5. soil erosion
6. out of control
未能做成某事
与……和谐
被引入……
土壤侵蚀
失控
对……产生兴趣
Language points: Important words and expressions
7. remove ... from
8. decrease from ... to
9. in consequence
10. turn out
11. a substantial number of
12. once and for all
13. every last
14. owe it to sb to do sth
Language points: Important phrases
结果；因此
原来是；结果是，证明是
大量的
每一个
(认为)应该为某人做某事
彻底地；一劳永逸地
从……移走/去除
从……减少到……
Language points: Important words and expressions
1. Nor would they fail to imagine how its native
inhabitants, including royal penguins, king penguins,
and elephant seals, existed in perfect harmony with
their natural habitat for thousands of years.
Language points: Important sentences
Paraphrase: They couldn’t help but imagine how its native inhabitants, including royal penguins, king penguins, and elephant seals, existed in complete unity with their natural habitat for thousands of years.
Language points: Important sentences
例：1) He didn’t quit his job, nor was he fired.
他没有辞职，也没有被解雇。
2) They couldn’t understand it at the time, and nor could we.
他们那时无法理解这件事，我们也理解不了。
具有否定意义的副词放在句首时，句子要用部分倒装结构。
本句中nor 为否定词，它所引导的句子要用倒装语序，常见结构为：Nor + 助动词 / be 动词 / 情态动词 + 主语 + 谓语 + 其它成分
Language points: Important sentences
1) Never before have I seen such a moving film.
2) By no means will we give up.
3) Hardly had I entered the classroom when the bell rang.
具有否定意义的副词放在句首时，句子要用部分倒装结构。
类似副词和短语还有：never, seldom, little, few, rarely, nowhere, not until, hardly…when, no sooner… than, not only … but also, in no way, by no means, under no circumstances etc.
Language points: Important sentences
fail 的其它固定搭配：fail in doing sth
例：He failed in persuading Mary to go there with him.
他没能说服玛丽和他一起去。
fail to do sth 未能做成某事
例: The great bridge cannot fail to stop you in your tracks.
这座宏伟的大桥一定会让你止步观赏。
2. Unfortunately, the cats subsequently developed an
appetite for the birds, too.
Language points: Important sentences
Paraphrase: Unfortunately, the cats subsequently began to eat the birds, too.
develop an appetite for ...
develop a taste for ... 对……产生兴趣
develop an interest in ...
develop a close friendship with ... 与……产生亲密的友谊
develop the habit of ... 养成……的习惯
develop (an) immunity to ... 对……产生免疫力
Language points: Important sentences
例: 1）Suzy developed an interest in violin when she was just a
child. Suzy 还是小孩子的时候，就对小提琴产生了兴趣。
2） He has developed the habit of reading before going to
bed. 他已经养成了睡前阅读的习惯。
3）They have developed (an) immunity to the virus.
他们已经对病毒产生了免疫力。
3. Loose on the island, they did what rabbits do best – they multiplied rapidly and began eating the native vegetation and digging holes, which caused soil erosion.
Language points: Important sentences
Paraphrase: Rabbits were free on the island and they did what rabbits do best – they increased their numbers rapidly and began eating the local plants, flowers, etc and digging holes, which caused soil erosion.
Language points: Important sentences
1）We reached the top of the mountain. We were tired and hungry.
形容词（短语）作状语的用法：其逻辑主语为句子的主语，是由主语相同的两个句子改写而成的。
= We reached the top of the mountain, tired and hungry.
我们到达山顶。感觉又累又饿。
= Satisfied with it, Jane bought the book immediately.
Jane对这本书很满意，立刻就买了下来。
2）Jane was satisfied with it. She bought the book immediately.
4. This in turn led to more cats hunting the birds.
Language points: Important sentences
Paraphrase: As a result, this led to more cats hunting the birds.
in turn 依次；轮流。还可以表示结果，相当于as a result，和下文中的 in consequence 同义。
例：1）The grape production declined greatly this year
which in turn brought a rise in its price.
今年的葡萄产量大幅度下降，因此价格上涨了。
2）He was over the age limit and in consequence, his
application was rejected.
他已超过了年龄限制，因此他的申请被拒绝了。
5. They have been trained to find every last one,
without harming the native animals.
Language points: Important sentences
Paraphrase: They have been trained to find all the remaining invading species, and at the same time, they are required not to harm the native animals.
every last 与 every single 同义，比 every 语气更强，相当于
all。one 在此代替前一句话中所说的 the last remaining invading species。
例：1) My sister ate every last biscuit. 我妹妹吃掉了所有的饼干。
2) He captured every last detail. 他抓住了每一个细节。
6.This intervention is a long, much-delayed ending to a sad story, but we humans owe it to the island to give it a happy ending.
Language points: Important sentences
Paraphrase: This intervention is an ending to a sad story which takes a long time and is delayed much, but it’s our responsibility to give the island a happy ending.
Language points: Important sentences
owe it to sb to do sth 应该为某人做某事
例：1）We owe it to the heroes to build a memorial.
我们应该为这些英雄建一座纪念碑。
2）We owe it to our children to clean up the
environment.
我们应该为孩子们治理环境。
VI
Homework
Homework
Write a short passage about how human interference led to great changes in your hometown.
Understanding ideas
Unit 5 A delicate world
目录页
contents
Pre-reading
I
Language points
Ⅳ
Fast reading
II
Homework
Ⅴ
Intensive reading
III
VI
Post-reading
Ⅰ
Pre-reading
Pre-reading
Look at the picture and answer the questions.
1. What animals can you see in
the picture
Students’ own answers.
Pre-reading
Look at the picture and answer the questions.
2. What kind of changes would
take place if cats, rats and
rabbits were introduced to an
environment like this
They would hunt the birds and eat the native vegetation, thus upsetting the local ecological balance.
Background Information
Pre-reading
Macquarie Island – UNESCO World Heritage Centre
Macquarie Island (34 km long x 5 km wide) is an oceanic island in the Southern Ocean, lying 1,500 km south-east of Tasmania and approximately halfway between Australia and the Antarctic continent. The island is the exposed crest of the undersea Macquarie Ridge, raised to its present position where the Indo-Australian tectonic plate meets the Pacific plate. It is a major
Background Information
Pre-reading
geoconservation significance, being the only place on earth where rocks from the earth’s mantle (6 km below the ocean floor) are being actively exposed above sea-level. These unique exposures include excellent examples of pillow basalts and other extrusive rocks.
Ⅱ
Fast reading
Fast reading
Read the passage and find out what happened to Macquarie Island.
Non-native species introduced to Macquarie Island attacked native birds, and led to a substantial reduction of bird population and even the extinction of parakeets. In addition, non-native species ate and devastated the native
Fast reading
Read the passage and find out what happened to Macquarie Island.
vegetation. All of this played a part in upsetting the natural harmony of the island. But now the island’s ecology is on the road to recovery with human efforts.
Fast reading
Choose the author’s purpose in writing the passage and give your reasons.
1. To analyse how Macquarie Island was saved from destruction.
2. To inform readers of the chaos caused on Macquarie Island by
humans.
3. To entertain readers with a funny story about what happened
on Macquarie Island.
4. To suggest ways in which an ecosystem can be protected.
Fast reading
Choose the author’s purpose in writing the passage and give your reasons.
Para 2: ... It’s a tragic story that began in 1810 when humans arrived on the island ...
Para 6: So, I am here on Macquarie Island to participate in the programme to track this problem. The first step ...
Many examples also give clues to the author’s purpose in writing the passage.
III
Intensive reading
Intensive reading: Find detailed information
Organize information from the passage and complete the flow chart.
To live there.
Rats and mice were brought there by accident, and
they took over the island, eating the birds’ eggs and attacking baby birds.
ACTION(S)
PURPOSE(S)
RESULT(S)
Humans arrived on Macquarie Island.
Intensive reading: Find detailed information
Organize information from the passage and complete the chart.
Cats were brought to the island.
To control the rats and mice.
The cats developed an appetite for the birds.
ACTION(S)
PURPOSE(S)
RESULT(S)
Intensive reading: Find detailed information
Rabbits were introduced to
the island.
To provide food for humans.
the exploding rabbit population provided plentiful food for the cats. This led to more cats hunting the birds. As a result, parakeets died out in 1891.
Organize information from the passage and complete the chart.
ACTION(S)
PURPOSE(S)
RESULT(S)
Rabbits multiplied and caused soil erosion, and
Intensive reading: Find detailed information
A virus was released onto the island.
To remove all the rabbits from the island.
Substantial reduction of rabbit population led to cats killing more native birds.
Organize information from the passage and complete the chart.
ACTION(S)
PURPOSE(S)
RESULT(S)
Intensive reading: Find detailed information
Traps and dogs were used.
To catch the cats.
Organize information from the passage and complete the chart.
ACTION(S)
PURPOSE(S)
RESULT(S)
The departure of the cats resulted in an increasing population of rats and mice. And the rabbit population exploded once again.
Intensive reading: Find detailed information
Poison and dogs were used.
To remove all the remaining invading species.
The island was pest-free and its ecology is on the road to recovery.
Organize information from the passage and complete the chart.
ACTION(S)
PURPOSE(S)
RESULT(S)
Ⅳ
Post-reading
Now talk about how human interference led to such severe consequence for Macquarie Island.
Post-reading: Think and share
What is your understanding of “... we humans owe it to the island to give it a happy ending”
Post-reading: Think and share
Share your own answers.
2. Do you think it was right to eradicate the “pests”
from Macquarie Island Give your reasons.
Post-reading: Think and share
Share your own answers.
3. How could similar situations be avoided in the
future
Post-reading: Think and share
To avoid similar situations in the future, we should protect the natural ecosystem and be aware of the potential impact that human activities can have on ecosystems.
4. What language can you use to talk about cause
and effect How would you apply it to your
reading and writing
Post-reading: Think and share
Share your own answers.
Language points
Ⅴ
1）设陷阱捕捉；夹住；卡住
Eg: It’s cruel to trap birds.
捕鸟是残忍的。
2）把……困住；使陷入困境
Eg: Having been trapped in traffic, he was late for work.
因为交通堵塞，他上班迟到了。
Language points: Important words
1. trap v. （trapped, trapped）
Language points: Important words
trap n. 1) 陷阱；夹子；罗网
set a trap for mice 设夹子捉老鼠
2) （陷害人的）圈套；诡计
fall into a trap 落入圈套
3) 牢笼；困境
Some people feel that marriage is a trap.
有人认为婚姻是牢笼。
Language points: Important words
n. drama
adj. dramatic
[C]（一出）戏；戏剧性事件
[U] 戏剧；戏剧艺术；戏剧文学
1. 戏剧的；戏剧性的
the dramatic arts 戏剧艺术
2. 突然的
a dramatic increase 剧增
3. 给人印象深刻的
a dramatic victory 激动人心的胜利
adv. 显著地；戏剧地；引人注目地
2.
dramatically
3. harmony n. 和谐；和睦；融洽
Language points: Important words and expressions
In this heavenly world, people live in perfect harmony with nature.
在这天堂般的世界里，人与自然和谐相处。
harmonious adj. 和谐的；和睦的；
harmonious society 和谐社会
The “Chinese Dream” is a dream to improve people’s well-being and a dream of harmony, peace and development.
中国梦是提高人民幸福感的梦，是和谐、和平与发展的梦。
4. explode v.
Language points: Important words and expressions
The firework exploded in his hand.
那个爆竹在他手里响了。
2) （感情、暴力事件）爆发；激增
explode with anger 勃然大怒
Florida’s population exploded after World War Ⅱ.
二战后，佛罗里达州的人口迅速增加。
1) 使爆炸
explode a bomb 引爆炸弹
1. fail to do sth
2. in harmony with
3. develop an appetite for
4. be introduced to
5. soil erosion
6. out of control
未能做成某事
与……和谐
被引入……
土壤侵蚀
失控
对……产生兴趣
Language points: Important words and expressions
7. remove ... from
8. decrease from ... to
9. in consequence
10. turn out
11. a substantial number of
12. once and for all
13. every last
14. owe it to sb to do sth
Language points: Important phrases
结果；因此
原来是；结果是，证明是
大量的
每一个
(认为)应该为某人做某事
彻底地；一劳永逸地
从……移走/去除
从……减少到……
Language points: Important words and expressions
1. Nor would they fail to imagine how its native
inhabitants, including royal penguins, king penguins,
and elephant seals, existed in perfect harmony with
their natural habitat for thousands of years.
Language points: Important sentences
Paraphrase: They couldn’t help but imagine how its native inhabitants, including royal penguins, king penguins, and elephant seals, existed in complete unity with their natural habitat for thousands of years.
Language points: Important sentences
例：1) He didn’t quit his job, nor was he fired.
他没有辞职，也没有被解雇。
2) They couldn’t understand it at the time, and nor could we.
他们那时无法理解这件事，我们也理解不了。
具有否定意义的副词放在句首时，句子要用部分倒装结构。
本句中nor 为否定词，它所引导的句子要用倒装语序，常见结构为：Nor + 助动词 / be 动词 / 情态动词 + 主语 + 谓语 + 其它成分
Language points: Important sentences
1) Never before have I seen such a moving film.
2) By no means will we give up.
3) Hardly had I entered the classroom when the bell rang.
具有否定意义的副词放在句首时，句子要用部分倒装结构。
类似副词和短语还有：never, seldom, little, few, rarely, nowhere, not until, hardly…when, no sooner… than, not only … but also, in no way, by no means, under no circumstances etc.
Language points: Important sentences
fail 的其它固定搭配：fail in doing sth
例：He failed in persuading Mary to go there with him.
他没能说服玛丽和他一起去。
fail to do sth 未能做成某事
例: The great bridge cannot fail to stop you in your tracks.
这座宏伟的大桥一定会让你止步观赏。
2. Unfortunately, the cats subsequently developed an
appetite for the birds, too.
Language points: Important sentences
Paraphrase: Unfortunately, the cats subsequently began to eat the birds, too.
develop an appetite for ...
develop a taste for ... 对……产生兴趣
develop an interest in ...
develop a close friendship with ... 与……产生亲密的友谊
develop the habit of ... 养成……的习惯
develop (an) immunity to ... 对……产生免疫力
Language points: Important sentences
例: 1）Suzy developed an interest in violin when she was just a
child. Suzy 还是小孩子的时候，就对小提琴产生了兴趣。
2） He has developed the habit of reading before going to
bed. 他已经养成了睡前阅读的习惯。
3）They have developed (an) immunity to the virus.
他们已经对病毒产生了免疫力。
3. Loose on the island, they did what rabbits do best – they multiplied rapidly and began eating the native vegetation and digging holes, which caused soil erosion.
Language points: Important sentences
Paraphrase: Rabbits were free on the island and they did what rabbits do best – they increased their numbers rapidly and began eating the local plants, flowers, etc and digging holes, which caused soil erosion.
Language points: Important sentences
1）We reached the top of the mountain. We were tired and hungry.
形容词（短语）作状语的用法：其逻辑主语为句子的主语，是由主语相同的两个句子改写而成的。
= We reached the top of the mountain, tired and hungry.
我们到达山顶。感觉又累又饿。
= Satisfied with it, Jane bought the book immediately.
Jane对这本书很满意，立刻就买了下来。
2）Jane was satisfied with it. She bought the book immediately.
4. This in turn led to more cats hunting the birds.
Language points: Important sentences
Paraphrase: As a result, this led to more cats hunting the birds.
in turn 依次；轮流。还可以表示结果，相当于as a result，和下文中的 in consequence 同义。
例：1）The grape production declined greatly this year
which in turn brought a rise in its price.
今年的葡萄产量大幅度下降，因此价格上涨了。
2）He was over the age limit and in consequence, his
application was rejected.
他已超过了年龄限制，因此他的申请被拒绝了。
5. They have been trained to find every last one,
without harming the native animals.
Language points: Important sentences
Paraphrase: They have been trained to find all the remaining invading species, and at the same time, they are required not to harm the native animals.
every last 与 every single 同义，比 every 语气更强，相当于
all。one 在此代替前一句话中所说的 the last remaining invading species。
例：1) My sister ate every last biscuit. 我妹妹吃掉了所有的饼干。
2) He captured every last detail. 他抓住了每一个细节。
6.This intervention is a long, much-delayed ending to a sad story, but we humans owe it to the island to give it a happy ending.
Language points: Important sentences
Paraphrase: This intervention is an ending to a sad story which takes a long time and is delayed much, but it’s our responsibility to give the island a happy ending.
Language points: Important sentences
owe it to sb to do sth 应该为某人做某事
例：1）We owe it to the heroes to build a memorial.
我们应该为这些英雄建一座纪念碑。
2）We owe it to our children to clean up the
environment.
我们应该为孩子们治理环境。
VI
Homework
Homework
Write a short passage about how human interference led to great changes in your hometown.