外研版（2019）选择性必修第二册Unit 5 A Delicate World Using language 课件(共18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18张PPT) |  | |
| 格式 | pptx | ||
| 文件大小 | 36.1MB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 外研版（2019） | ||
| 科目 | 英语 | ||
| 更新时间 | 2024-05-16 21:19:56 | ||
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(共18张PPT)
Unit5
A delicate world
外研版（2019）选择性必修二
Unit 5
A delicate world
Using language
Look at the sentences and answer the questions. Sentences (a) and (c) are from the reading passage.
a No visitor would think it surprising that the island is a UNESCO World Heritage Site.
b 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.
1 What does “it” refer to in sentences (a) and (c)
2 What is the difference between the sentences in each group
When the object of a sentence is a that-clause (b) or an infinitive (d), we sometimes use “it” as an empty object and put the real object later to keep balance. For example, sentence (a) uses “it” as the empty object of “think”, referring to the real object: “the island is a UNESCO World Heritage Site”. Sentence (b) uses that-clause as the object of “think”.
Now look for more sentences with this structure in the reading passage, and summarise its use in your own words.
This incident made it clear that the rat, mouse and rabbit problem needed solving once and for all.
…but we humans owe it to the island to give it a happy ending.
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 作形式宾语的常见情况归纳如下：
1. it代替不定式短语。常用于：
think/ find/ feel/ consider/ make/ regard... it + adj./n. + to do
I find it pleasant to work with him.
They felt it difficult to finish the work in such a short time.
She thinks it her duty to help him.
All these noises made it impossible for me to go on with the work.
2. it代替v.-ing只限于少数句型。
consider/think/find... it + good/ use/ worthwhile... + doing...
The professor considers it no good reading without understanding.
Do you consider it any use arguing with him
I don’t think it worthwhile going to such a place.
it 作形式宾语的常见情况归纳如下：
3. it代替宾语从句(that有时候可以省略)。
think/find/make... it + n./adj. + Object Clause...
We all thought it a pity that the conference was cancelled.
They kept it quiet that he was dead.
He hasn’t make it clear when he is coming back.
it 作形式宾语的常见情况归纳如下：
根据括号内的汉语提示并用it作形式宾语补全下面句子。
1. _______________________ (我认为那很重要) to find a part-time job.
2. _______________________________ (新技术使之成为可能) to achieve a balance between economic development and ecosystems.
3. _______________________ (他们觉得很困难) to recover the original ecosystem in such a short time last year.
4. ______________________________________ (你为何不让人们引起注意) that our actions, no matter how small they may be, make a difference to nature
I consider it important
New technologies make it possible
They felt it very difficult
Why don't you bring it to people's attention
Rewrite the underlined parts using it as an empty object.
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
people have found it a threat to other species to release these turtles into the wild
Experts consider it important for owners to keep their pets in an enclosed area
Look at pictures of Saihanba National Forest Park and find out the changes.
/
Located in Chengde City, Hebei Province, Saihanba (塞罕坝) sits 450 kilometers to the north of Beijing. The place is covered with snow seven months a year. It used to be a freezing, barren desert plagued by sandstorms. However, it has been turned into the world’s largest human-made forest that covers an area of nearly 75,000 hectares. Thus, it is called a “green miracle.”
Background Information
nouns / adjectives to do / that
breakthrough impossible likely unrealistic ... grow
investigate
plant trees
transform
...
Now describe its changes using it as an empty object where appropriate. You may refer to the words and expressions in the table for help.
I think it a breakthrough to transform a desert into a forest...
I think it impossible to grow trees there in the 1960s.
I think it unrealistic to plant trees in the desert when the workers first came to Saihanba.
Ecosystems
Look at the diagram and answer the questions. Pay attention to the words and expressions in bold.
.
to the words and expressions in bold
1. What does the diagram show
The diagram shows a food chain--the connection between the living things.
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 absorb light from the sun, and water and
dissolved nutrients from the soil, which are provided by
decomposers.
Complete the passage with the correct form of the words and expressions from the above diagram.
In a woodland ecosystem, trees and other plants are producers,
They 1 ______water, and take in nutrients from the soil and energy
from the sun. Insects are an example of a primary consumer. They
2________ the producers to provide food for them, and are 3 by
Secondary consumers: small mammals and birds. They 4 the
Primary consumers. Fungi and bacteria are decomposers. They 5____
Animal waste and the remains of living things. The chemicals these
decomposers 6 fertilise the soil and give the plants the
Nutrients they need to grow.
absorb
rely on
fed on
prey on
break down
release
Thanks!
Thanks!
Unit5
A delicate world
外研版（2019）选择性必修二
Unit 5
A delicate world
Using language
Look at the sentences and answer the questions. Sentences (a) and (c) are from the reading passage.
a No visitor would think it surprising that the island is a UNESCO World Heritage Site.
b 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.
1 What does “it” refer to in sentences (a) and (c)
2 What is the difference between the sentences in each group
When the object of a sentence is a that-clause (b) or an infinitive (d), we sometimes use “it” as an empty object and put the real object later to keep balance. For example, sentence (a) uses “it” as the empty object of “think”, referring to the real object: “the island is a UNESCO World Heritage Site”. Sentence (b) uses that-clause as the object of “think”.
Now look for more sentences with this structure in the reading passage, and summarise its use in your own words.
This incident made it clear that the rat, mouse and rabbit problem needed solving once and for all.
…but we humans owe it to the island to give it a happy ending.
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 作形式宾语的常见情况归纳如下：
1. it代替不定式短语。常用于：
think/ find/ feel/ consider/ make/ regard... it + adj./n. + to do
I find it pleasant to work with him.
They felt it difficult to finish the work in such a short time.
She thinks it her duty to help him.
All these noises made it impossible for me to go on with the work.
2. it代替v.-ing只限于少数句型。
consider/think/find... it + good/ use/ worthwhile... + doing...
The professor considers it no good reading without understanding.
Do you consider it any use arguing with him
I don’t think it worthwhile going to such a place.
it 作形式宾语的常见情况归纳如下：
3. it代替宾语从句(that有时候可以省略)。
think/find/make... it + n./adj. + Object Clause...
We all thought it a pity that the conference was cancelled.
They kept it quiet that he was dead.
He hasn’t make it clear when he is coming back.
it 作形式宾语的常见情况归纳如下：
根据括号内的汉语提示并用it作形式宾语补全下面句子。
1. _______________________ (我认为那很重要) to find a part-time job.
2. _______________________________ (新技术使之成为可能) to achieve a balance between economic development and ecosystems.
3. _______________________ (他们觉得很困难) to recover the original ecosystem in such a short time last year.
4. ______________________________________ (你为何不让人们引起注意) that our actions, no matter how small they may be, make a difference to nature
I consider it important
New technologies make it possible
They felt it very difficult
Why don't you bring it to people's attention
Rewrite the underlined parts using it as an empty object.
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
people have found it a threat to other species to release these turtles into the wild
Experts consider it important for owners to keep their pets in an enclosed area
Look at pictures of Saihanba National Forest Park and find out the changes.
/
Located in Chengde City, Hebei Province, Saihanba (塞罕坝) sits 450 kilometers to the north of Beijing. The place is covered with snow seven months a year. It used to be a freezing, barren desert plagued by sandstorms. However, it has been turned into the world’s largest human-made forest that covers an area of nearly 75,000 hectares. Thus, it is called a “green miracle.”
Background Information
nouns / adjectives to do / that
breakthrough impossible likely unrealistic ... grow
investigate
plant trees
transform
...
Now describe its changes using it as an empty object where appropriate. You may refer to the words and expressions in the table for help.
I think it a breakthrough to transform a desert into a forest...
I think it impossible to grow trees there in the 1960s.
I think it unrealistic to plant trees in the desert when the workers first came to Saihanba.
Ecosystems
Look at the diagram and answer the questions. Pay attention to the words and expressions in bold.
.
to the words and expressions in bold
1. What does the diagram show
The diagram shows a food chain--the connection between the living things.
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 absorb light from the sun, and water and
dissolved nutrients from the soil, which are provided by
decomposers.
Complete the passage with the correct form of the words and expressions from the above diagram.
In a woodland ecosystem, trees and other plants are producers,
They 1 ______water, and take in nutrients from the soil and energy
from the sun. Insects are an example of a primary consumer. They
2________ the producers to provide food for them, and are 3 by
Secondary consumers: small mammals and birds. They 4 the
Primary consumers. Fungi and bacteria are decomposers. They 5____
Animal waste and the remains of living things. The chemicals these
decomposers 6 fertilise the soil and give the plants the
Nutrients they need to grow.
absorb
rely on
fed on
prey on
break down
release
Thanks!
Thanks!