外研版（2019）选择性必修第二册Unit 5 A delicate world Using language 课件(共41张PPT)
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| 名称 | 外研版（2019）选择性必修第二册Unit 5 A delicate world Using language 课件(共41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 | 2023-05-15 08:50:51 | ||
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(共41张PPT)
新外研社高中英语选择性必修二Unit 5A delicate world
Using Language
Grammar
No visitor would think it surprising that the island
is a UNESCO World Heritage Site
d. Experts felt it necessary to come up with a plan to remove all the rabbits from the island.
Analyze the structure of the sentences
83%
58%
No visitor would think it surprising that the island
is a UNESCO World Heritage Site
d. Experts felt it necessary to come up with a plan to remove all the rabbits from the island.
Analyze the structure of the sentences
What does “it” refer to in sentence(a) and sentence (c)
宾语从句
不定式
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No visitor would think it surprising that the island is a UNESCO World Heritage Site
No visitor would think that the island being a UNESCO World Heritage Site is surprising.
c. Experts felt it necessary to come up with a plan to remove all the rabbits from the island.
d. Experts felt to come up with a plan to remove all the rabbits from the island was necessary
宾语从句
宾语从句
It作形式宾语
条件
真正的宾语是
有宾语补足语
不定式
动名词
从句
具备了这两个条件， 形式宾语it一定要用。
It 指代不定式
think/find/consider/feel/make/regard it + 形容词/名词+ to do sth
I find it pleasant to work with him.
All these noises made it impossible for me to go on the work.
They felt it my honor to be invited to speak here.
She considers it her duty to take care of us.
It 指代动名词
动词+ it no good/no use/useless doing sth
The professor considers it no good reading without understanding
Do you consider it any good trying again
He found it useless(no use) arguing with him.
ADD YOUR TITLE HERE
It 指代从句
动词+ it+ 形容词/名词+从句
We all thought it a pity that the performance had been delayed
You should make it clear whether you want it or not.
They found it pleasant that they worked with us Chinese.
动词+ it +介词短语+从句
We owe it to you that there wasn’t a serious accident.
I took it for granted that they were not coming.
It 指代从句
appreciate/hate/like/love+ it +if/when+从句
I hate it when my mother asks me to eat eggs.
I would appreciate it if you could consider my application
动词+it+过去分词+从句
He made it known to everyone that he was right.
it 作形式宾语的用法？
当不定式、动名词或从句在某个句子中作宾语时，为了保持句子的结构平衡，常用it作为形式宾语，而将真正的宾语放到句子后部去。
it 没有具体的意义，仅用于维持句子结构平衡。构成结构为：
动词+it+宾语补足语+真正的宾语
it作形式宾语宾要有三种情况：代表不定式作形式宾语、代表动名词作形式宾语、代表宾语从句作形式宾语。
常见的以it作形式宾语的动词有：feel, consider, find, believe, make, take, imagine, prove, think, suppose, regard, notice等。
Summary
it 代表不定式作形式宾语
He found it pleasant to work with us Chinese.
He makes it a rule never to borrow money from others.
I don’t feel it difficult to understand the passage.
注意：当真正的宾语是动词不定式（短语）时，不定式（短语）可以有自己的逻辑主语，该逻辑主语常由for引出。
e.g. He likes stay up late, so he often feels sleepy, which makes it difficult for him to concentrate on what he is doing.
（逻辑主语和真正的主语保持一致，都是he）
He likes stay up late, so he often feels sleepy, which makes it uncomfortable for his colleagues to work with him.
（逻辑主语his colleagues和真正的主语he不一致）
it 代表动名词作形式宾语
I think it no good spending too much time watching TV.
我认为花太多时间看电视是没有好处的。
I feel it hard work persuading him into doing it.
我感觉说服他做那件事很难。
用v-ing（短语）作真正的宾语时，其宾补通常是no use, no good, a waste, hard work等。
it 代表宾语从句作形式宾语
动词+it+that从句（常见于take, have, put等动词之后）
I take it that he will finish the task by himself.
我认为他能自己完成这项任务。
动词+it+when/if从句（常见于hate, like, love, appreciate, enjoy, prefer等动词之后）
I hate it when he talks with his mouth full.
I’d appreciate it if you could do us a favour.
it 代表宾语从句作形式宾语
在一些特殊结构中，用it作形式宾语。
动词+it+介词短语+that从句
take it for granted that ... 认为……是理所当然的
owe it to sb. that ... 多亏……/幸亏……
bring it to sb’s attention that ... 让某人注意到……
He seemed to take it for granted that he should speak as a representative.
I owe it to my teacher that I made such rapid progress.
You should bring it to his attention that you are too weak to go on working.
你应该让他注意到你太虚弱而不能继续工作。
it 代表宾语从句作形式宾语
在一些特殊结构中，用it作形式宾语。
动词+介词+it+that从句
see to it that ... 确保……
look to it that ... 看……/指望……
insist on it that ... 坚持……
stick to it that .... 坚持……
answer for it that ...回答……
depend on it that ... 依靠……
Would you see to it that she gets home early
He insisted on it that he was innocent.
it 代表宾语从句作形式宾语
动词+it+过去分词+that从句
He made it known to everyone that he was right.
他让每个人都明白他是对的。
ADD YOUR TITLE HERE
Let’s practice
1. I consider it no use ___________(talk) with him about it .
2. I don’t think _______ possible to master a foreign language without much memory work.
3. I would appreciate _______ if you would like to teach me how to use the computer.
4. The Internet makes it possible _________(share ) the latest news.
5. I think _______ my duty to help her.
talking
it
it
to share
it
ADD YOUR TITLE HERE
Let’s practice
6. We all thought it a pity __________ the conference should have been cancelled.
7. They took ________ for granted that I would be no good at it .
that
it
ADD YOUR TITLE HERE
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Translate the following sentences
1. Children feel it safe and happy to be with their parents.
2. I find it hard to get along with her.
3. Modern technology has made it possible to fly in space.
4. The heavy rain made it more difficult for us to finish the work on time.
5. We thought it no use explaining to him what happened.
many people think it a good idea to keep this turtle as a pet
believe it no big issue to release them into the wild
Rewrite the underlined parts using it as an empty object.
3. people have found it a threat to other species to release these turtles into the wild
4. Experts consider it important for owners to keep their pets in an enclosed area
Rewrite the underlined parts using it as an empty object.
Look at the pictures of the Saihanba National Forest Park and describe its changes using it as an empty object where appropriate.
1960s
present day
I think it a breakthrough to transform a desert into a forest…
nouns/adjectives
breakthrough
impossible
likely
unrealistic
…
to do /that
grow
investigate
plant trees
transform
…
Ecosystems
0,000 people reading my blog! b I love to photograph the rising sun, …
1. absorb __________________
2. dissolved nutrients __________________
3. rely on __________________
4. provide energy __________________
吸收，摄入
溶解的营养物质
依靠，依赖
提供能量
Vocabulary building: Ecosystems
Pay attention to the words and expressions in bold.
0,000 people reading my blog! b I love to photograph the rising sun, …
5. feed on ____________________
6. prey on ____________________
7. break down ____________________
8. release ____________________
以……为食
捕食，掠夺
Vocabulary building: Ecosystems
分解
释放
Pay attention to the words and expressions in bold.
Vocabulary building: Ecosystems
Look at the diagram and answer the questions.
Vocabulary building: Ecosystems
1.What does the diagram show
The diagram shows a food chain – the connection between the living things.
Questions
Answers
Look at the diagram and answer the questions.
Vocabulary building: Ecosystems
2. What are the
relationships
between the
living things
The living things are closely connected with each other by the food they eat. Secondary consumers prey on primary consumers, primary consumers feed on producers, and producers
Questions
Answers
Look at the diagram and answer the questions.
Vocabulary building: Ecosystems
2. What are the
relationship
between the
living things
absorb light from the sun, and water and dissolved nutrients from the soil, which are provided by decomposers.
Questions
Answers
Look at the diagram and answer the questions.
Vocabulary building: Ecosystems
Complete the passage with the correct form of the words and expressions.
In a woodland ecosystem, trees and other plants are producers. They water, and take in nutrients from the soil and energy from the sun. Insects are an example of a primary consumer. They the producers to provide food for them, and are by secondary consumers: small mammals and birds. They the primary consumers. Worms, fungi
absorb
rely on
fed on
prey on
Vocabulary building: Ecosystems
Complete the passage with the correct form of the words and expressions.
and bacteria are decomposers. They animal waste and the remains of living things. The chemicals these decomposers fertilise the soil and give the plants the nutrients they need to grow.
break down
release
Listening & speaking
Listening & speaking: Before listening
One of the oldest species in the ecosystem. the honey bee
has been in existence for millions of years.
A honey bee can fly as fast as 24 kilometres per hour and
its wings can beat 200 times per second.
Injust one journey to collect pollen and nectar,one single
honey bee can pollinate asmany as50 to 100 flowers.
One of the oldest species in the ecosystem, the honey
bee has been in existence for millions of years.
A honey bee can fly as fast as 24 kilometres per hour
and its wings can beat 200 times per second.
In just one journey to collect pollen and nectar, one
single honey bee can pollinate as many as 50 to 100
flowers.
Background information
Listening & speaking: While-listening
Listen to the conversation and choose the true statements.
Beesare very important to our food supply becausethey
provide honey.
2 The bee population is declining.
3 Without bees,humans would die out.
4 All human crops depend on beesfor pollination.
S If bees became extinct, other insectscould pollinate
1. Bees are very important to our food supply because they provide honey.
2. The bee population is declining.
3. Without bees, humans would die out.
4. All human crops depend on bees for pollination.
Listening & speaking: While-listening
Listen to the conversation and choose the true statements.
Beesare very important to our food supply becausethey
provide honey.
2 The bee population is declining.
3 Without bees,humans would die out.
4 All human crops depend on beesfor pollination.
S If bees became extinct, other insectscould pollinate
5. If bees became extinct, other insects could
pollinate enough crops.
6. Humans are responsible for the decline in the
bee population.
Listening & speaking: While-listening
A combination of things damages bee habitats, mainly ________________________________.
Listen again and complete the flow chart.
The bee population is ______________________. According to statistics, bee numbers in the US _______________________in just one year.
pesticides and climate changes
declining very quickly
have fallen by 17%
Without bees, crops would ___________________. _____________ would not be able to compensate for the loss of bees, because __________________ _______________________ of the species of crops.
Listening & speaking: While-listening
Listen again and complete the flow chart.
Animals that live on the crops _______________
be unable to reproduce
Other insects
bees are responsible
would die out
for pollinating about 70%
Humans have nothing to eat and die out.
Listening & speaking: Summary
have fun
You must be kidding! Are you sure about ...
I don’t believe it! Check it out for yourself ...
It’s a fact! According to statistics ...
Don’t forget that …
Expressing doubt Responding to doubt
Complete the boxes with the expressions from the conversation.
Listening & speaking: Summary
Expressing doubt Responding to doubt
You must be kidding!
I don’t believe it!
Are you sure about ...
It’s a fact!
Don’t forget that…
Check it out for yourself... According to statistics...
Complete the boxes with the expressions from the conversation.
Listening & speaking: Pair work
Work in pairs. Talk about what would happen to the ecosystem if another species died out. Use the words and expressions in this section.
新外研社高中英语选择性必修二Unit 5A delicate world
Using Language
Grammar
No visitor would think it surprising that the island
is a UNESCO World Heritage Site
d. Experts felt it necessary to come up with a plan to remove all the rabbits from the island.
Analyze the structure of the sentences
83%
58%
No visitor would think it surprising that the island
is a UNESCO World Heritage Site
d. Experts felt it necessary to come up with a plan to remove all the rabbits from the island.
Analyze the structure of the sentences
What does “it” refer to in sentence(a) and sentence (c)
宾语从句
不定式
ADD YOUR TITLE HERE
单击编辑标题
单击此处可编辑内容，根据您的需要自由拉伸文本框大小
单击编辑标题
单击此处可编辑内容，根据您的需要自由拉伸文本框大小
单击编辑标题
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No visitor would think it surprising that the island is a UNESCO World Heritage Site
No visitor would think that the island being a UNESCO World Heritage Site is surprising.
c. Experts felt it necessary to come up with a plan to remove all the rabbits from the island.
d. Experts felt to come up with a plan to remove all the rabbits from the island was necessary
宾语从句
宾语从句
It作形式宾语
条件
真正的宾语是
有宾语补足语
不定式
动名词
从句
具备了这两个条件， 形式宾语it一定要用。
It 指代不定式
think/find/consider/feel/make/regard it + 形容词/名词+ to do sth
I find it pleasant to work with him.
All these noises made it impossible for me to go on the work.
They felt it my honor to be invited to speak here.
She considers it her duty to take care of us.
It 指代动名词
动词+ it no good/no use/useless doing sth
The professor considers it no good reading without understanding
Do you consider it any good trying again
He found it useless(no use) arguing with him.
ADD YOUR TITLE HERE
It 指代从句
动词+ it+ 形容词/名词+从句
We all thought it a pity that the performance had been delayed
You should make it clear whether you want it or not.
They found it pleasant that they worked with us Chinese.
动词+ it +介词短语+从句
We owe it to you that there wasn’t a serious accident.
I took it for granted that they were not coming.
It 指代从句
appreciate/hate/like/love+ it +if/when+从句
I hate it when my mother asks me to eat eggs.
I would appreciate it if you could consider my application
动词+it+过去分词+从句
He made it known to everyone that he was right.
it 作形式宾语的用法？
当不定式、动名词或从句在某个句子中作宾语时，为了保持句子的结构平衡，常用it作为形式宾语，而将真正的宾语放到句子后部去。
it 没有具体的意义，仅用于维持句子结构平衡。构成结构为：
动词+it+宾语补足语+真正的宾语
it作形式宾语宾要有三种情况：代表不定式作形式宾语、代表动名词作形式宾语、代表宾语从句作形式宾语。
常见的以it作形式宾语的动词有：feel, consider, find, believe, make, take, imagine, prove, think, suppose, regard, notice等。
Summary
it 代表不定式作形式宾语
He found it pleasant to work with us Chinese.
He makes it a rule never to borrow money from others.
I don’t feel it difficult to understand the passage.
注意：当真正的宾语是动词不定式（短语）时，不定式（短语）可以有自己的逻辑主语，该逻辑主语常由for引出。
e.g. He likes stay up late, so he often feels sleepy, which makes it difficult for him to concentrate on what he is doing.
（逻辑主语和真正的主语保持一致，都是he）
He likes stay up late, so he often feels sleepy, which makes it uncomfortable for his colleagues to work with him.
（逻辑主语his colleagues和真正的主语he不一致）
it 代表动名词作形式宾语
I think it no good spending too much time watching TV.
我认为花太多时间看电视是没有好处的。
I feel it hard work persuading him into doing it.
我感觉说服他做那件事很难。
用v-ing（短语）作真正的宾语时，其宾补通常是no use, no good, a waste, hard work等。
it 代表宾语从句作形式宾语
动词+it+that从句（常见于take, have, put等动词之后）
I take it that he will finish the task by himself.
我认为他能自己完成这项任务。
动词+it+when/if从句（常见于hate, like, love, appreciate, enjoy, prefer等动词之后）
I hate it when he talks with his mouth full.
I’d appreciate it if you could do us a favour.
it 代表宾语从句作形式宾语
在一些特殊结构中，用it作形式宾语。
动词+it+介词短语+that从句
take it for granted that ... 认为……是理所当然的
owe it to sb. that ... 多亏……/幸亏……
bring it to sb’s attention that ... 让某人注意到……
He seemed to take it for granted that he should speak as a representative.
I owe it to my teacher that I made such rapid progress.
You should bring it to his attention that you are too weak to go on working.
你应该让他注意到你太虚弱而不能继续工作。
it 代表宾语从句作形式宾语
在一些特殊结构中，用it作形式宾语。
动词+介词+it+that从句
see to it that ... 确保……
look to it that ... 看……/指望……
insist on it that ... 坚持……
stick to it that .... 坚持……
answer for it that ...回答……
depend on it that ... 依靠……
Would you see to it that she gets home early
He insisted on it that he was innocent.
it 代表宾语从句作形式宾语
动词+it+过去分词+that从句
He made it known to everyone that he was right.
他让每个人都明白他是对的。
ADD YOUR TITLE HERE
Let’s practice
1. I consider it no use ___________(talk) with him about it .
2. I don’t think _______ possible to master a foreign language without much memory work.
3. I would appreciate _______ if you would like to teach me how to use the computer.
4. The Internet makes it possible _________(share ) the latest news.
5. I think _______ my duty to help her.
talking
it
it
to share
it
ADD YOUR TITLE HERE
Let’s practice
6. We all thought it a pity __________ the conference should have been cancelled.
7. They took ________ for granted that I would be no good at it .
that
it
ADD YOUR TITLE HERE
单击编辑标题
单击此处可编辑内容，根据您的需要自由拉伸文本框大小
单击编辑标题
单击此处可编辑内容，根据您的需要自由拉伸文本框大小
单击编辑标题
单击此处可编辑内容，根据您的需要自由拉伸文本框大小
Translate the following sentences
1. Children feel it safe and happy to be with their parents.
2. I find it hard to get along with her.
3. Modern technology has made it possible to fly in space.
4. The heavy rain made it more difficult for us to finish the work on time.
5. We thought it no use explaining to him what happened.
many people think it a good idea to keep this turtle as a pet
believe it no big issue to release them into the wild
Rewrite the underlined parts using it as an empty object.
3. people have found it a threat to other species to release these turtles into the wild
4. Experts consider it important for owners to keep their pets in an enclosed area
Rewrite the underlined parts using it as an empty object.
Look at the pictures of the Saihanba National Forest Park and describe its changes using it as an empty object where appropriate.
1960s
present day
I think it a breakthrough to transform a desert into a forest…
nouns/adjectives
breakthrough
impossible
likely
unrealistic
…
to do /that
grow
investigate
plant trees
transform
…
Ecosystems
0,000 people reading my blog! b I love to photograph the rising sun, …
1. absorb __________________
2. dissolved nutrients __________________
3. rely on __________________
4. provide energy __________________
吸收，摄入
溶解的营养物质
依靠，依赖
提供能量
Vocabulary building: Ecosystems
Pay attention to the words and expressions in bold.
0,000 people reading my blog! b I love to photograph the rising sun, …
5. feed on ____________________
6. prey on ____________________
7. break down ____________________
8. release ____________________
以……为食
捕食，掠夺
Vocabulary building: Ecosystems
分解
释放
Pay attention to the words and expressions in bold.
Vocabulary building: Ecosystems
Look at the diagram and answer the questions.
Vocabulary building: Ecosystems
1.What does the diagram show
The diagram shows a food chain – the connection between the living things.
Questions
Answers
Look at the diagram and answer the questions.
Vocabulary building: Ecosystems
2. What are the
relationships
between the
living things
The living things are closely connected with each other by the food they eat. Secondary consumers prey on primary consumers, primary consumers feed on producers, and producers
Questions
Answers
Look at the diagram and answer the questions.
Vocabulary building: Ecosystems
2. What are the
relationship
between the
living things
absorb light from the sun, and water and dissolved nutrients from the soil, which are provided by decomposers.
Questions
Answers
Look at the diagram and answer the questions.
Vocabulary building: Ecosystems
Complete the passage with the correct form of the words and expressions.
In a woodland ecosystem, trees and other plants are producers. They water, and take in nutrients from the soil and energy from the sun. Insects are an example of a primary consumer. They the producers to provide food for them, and are by secondary consumers: small mammals and birds. They the primary consumers. Worms, fungi
absorb
rely on
fed on
prey on
Vocabulary building: Ecosystems
Complete the passage with the correct form of the words and expressions.
and bacteria are decomposers. They animal waste and the remains of living things. The chemicals these decomposers fertilise the soil and give the plants the nutrients they need to grow.
break down
release
Listening & speaking
Listening & speaking: Before listening
One of the oldest species in the ecosystem. the honey bee
has been in existence for millions of years.
A honey bee can fly as fast as 24 kilometres per hour and
its wings can beat 200 times per second.
Injust one journey to collect pollen and nectar,one single
honey bee can pollinate asmany as50 to 100 flowers.
One of the oldest species in the ecosystem, the honey
bee has been in existence for millions of years.
A honey bee can fly as fast as 24 kilometres per hour
and its wings can beat 200 times per second.
In just one journey to collect pollen and nectar, one
single honey bee can pollinate as many as 50 to 100
flowers.
Background information
Listening & speaking: While-listening
Listen to the conversation and choose the true statements.
Beesare very important to our food supply becausethey
provide honey.
2 The bee population is declining.
3 Without bees,humans would die out.
4 All human crops depend on beesfor pollination.
S If bees became extinct, other insectscould pollinate
1. Bees are very important to our food supply because they provide honey.
2. The bee population is declining.
3. Without bees, humans would die out.
4. All human crops depend on bees for pollination.
Listening & speaking: While-listening
Listen to the conversation and choose the true statements.
Beesare very important to our food supply becausethey
provide honey.
2 The bee population is declining.
3 Without bees,humans would die out.
4 All human crops depend on beesfor pollination.
S If bees became extinct, other insectscould pollinate
5. If bees became extinct, other insects could
pollinate enough crops.
6. Humans are responsible for the decline in the
bee population.
Listening & speaking: While-listening
A combination of things damages bee habitats, mainly ________________________________.
Listen again and complete the flow chart.
The bee population is ______________________. According to statistics, bee numbers in the US _______________________in just one year.
pesticides and climate changes
declining very quickly
have fallen by 17%
Without bees, crops would ___________________. _____________ would not be able to compensate for the loss of bees, because __________________ _______________________ of the species of crops.
Listening & speaking: While-listening
Listen again and complete the flow chart.
Animals that live on the crops _______________
be unable to reproduce
Other insects
bees are responsible
would die out
for pollinating about 70%
Humans have nothing to eat and die out.
Listening & speaking: Summary
have fun
You must be kidding! Are you sure about ...
I don’t believe it! Check it out for yourself ...
It’s a fact! According to statistics ...
Don’t forget that …
Expressing doubt Responding to doubt
Complete the boxes with the expressions from the conversation.
Listening & speaking: Summary
Expressing doubt Responding to doubt
You must be kidding!
I don’t believe it!
Are you sure about ...
It’s a fact!
Don’t forget that…
Check it out for yourself... According to statistics...
Complete the boxes with the expressions from the conversation.
Listening & speaking: Pair work
Work in pairs. Talk about what would happen to the ecosystem if another species died out. Use the words and expressions in this section.