外研版（2019）选择性必修 第二册Unit 5 A delicate world Grammar课件 (共19张PPT，内镶嵌视频)
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| 名称 | 外研版（2019）选择性必修 第二册Unit 5 A delicate world Grammar课件 (共19张PPT，内镶嵌视频) |  | |
| 格式 | pptx | ||
| 文件大小 | 17.7MB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 外研版（2019） | ||
| 科目 | 英语 | ||
| 更新时间 | 2024-10-28 21:18:28 | ||
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(共19张PPT)
It as an empty object
Unit 5 A Delicate World
Grammar
To learn the usage of it as an empty object.
To learn to describe the changes by using it as an empty object.
Learning objectives
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
Compare the sentences
a No visitor would think it surprising that the island is a
UNESCO World Heritage Site.
c Experts felt it necessary to come up with a plan to remove
all the rabbits from the island.
1 What does “it” refer to in sentences (a) and (c)
It refers to that clause in sentence (a) and an infinitive in sentence (c).
Compare the sentences
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”.
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.
Compare the sentences
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.
Look for more sentences
动词＋it＋形容词/名词＋(for/of sb)＋to do / that...
it 作 形式宾语
Summarise its use
it 作 形式宾语
1. 动词＋it＋形容词/名词＋(for/of sb)＋to do / that...
We make it a rule to visit the old every weekend.
我们规定每个周末都去看望那些老人们。
I don’t feel it difficult for me to tackle the problem.
我觉得解决这个问题并不难。
They considered it vital that they should keep their natural habitat. 他们认为保持它们的自然栖息地很重要。
It as an empty object
it 作 形式宾语
2.动词＋it＋no good / no use / useless / a waste of time /
worthwhile＋doing...
I’ll make it worthwhile telling me about his secret.
告诉我他的秘密，我会酬谢你的。
He thought it no use trying to multiply their number.
他认为企图增加它们的数量没有用。
it 作 形式宾语
3.动词 appreciate / hate / love / like / dislike后面接 if 或when引导的从句作宾语时，中间需用形式宾语it，构成“appreciate/hate/love/like/dislike＋it＋if/when从句”。
He will appreciate it if they assist him to tackle the difficult problem. 如果他们帮他解决这个难题，他将非常感激。
She hated it when he bragged that he was the most influential man in the district. 她讨厌他吹嘘自己是这个地区最有影响力的人。
it 作 形式宾语
4.一些“动词＋介词”构成的短语，如depend on，rely on，see to，stick to，take...for granted，owe...to sb/sth等后接 that 从句时，须用
it作形式宾语。
Would you see to it that she gets home early 你负责保证她早点到家，好吗？
You can’t depend on it that he will keep his promise that he will mount the top of the mountain. 你不能指望他会遵守他要登上山顶的诺言。
He owes it to his comrade’s help that he has made great progress in English. 他把在英语方面取得的巨大进步归功于朋友的帮助。
Summary
The red-eared slider, a species of freshwater turtle, is native to the
Southern United States and Northern Mexico. Due to its cute appearance,
many people think keeping this turtle as a pet is a good idea. Recent years
have seen more and more pet sliders escaping or being released from
homes, and some owners believe to release them into the wild is no big issue.
These days, people have found to release these turtles
into the wild is a threat to other species. Experts
consider owners keeping their pets in an enclosed
area important, and anyone unable to keep their pets
should take them to an appropriate animal shelter.
Rewrite the underlined parts using it as an empty object.
红耳滑水龟（巴西龟）
The red-eared slider, a species of freshwater turtle, is native to the Southern United States and Northern Mexico. Due to its cute appearance, many people think keeping this turtle as a pet is a good idea. Recent years have seen more and more pet sliders escaping or being released from homes, and some owners believe to release them into the wild is no big issue.
many people think it a good idea to keep this turtle as a pet.
Rewrite the underlined parts using it as an empty object.
believe it no big issue to release them into the wild
These days, people have found to release these turtles into the wild is a threat to other species. Experts consider owners
keeping their pets in an enclosed area important,
and anyone unable to keep their pets should take
them to an appropriate animal shelter.
Rewrite the underlined parts using it as an empty object.
红耳滑水龟（巴西龟）
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
Saihanba National Forest Park 塞罕坝国家森林公园
Located in Chengde City, Hebei Province, Saihanba 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.”
the Saihanba National Forest Park
塞罕坝国家森林公园（河北承德）
Describe the changes using it as an empty object.
present day
1960s
the Saihanba National Forest Park
塞罕坝国家森林公园（河北承德）
nouns / adjectives to do / that
breakthrough impossible likely unrealistic ... grow
investigate
plant trees
transform
...
I think it a breakthrough to transform a desert into a forest...
present day
1960s
the Saihanba National Forest Park
塞罕坝国家森林公园（河北承德）
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.
I think it likely to investigate the biodiversity in the Saihanba National Forest Park now.
It as an empty object
Unit 5 A Delicate World
Grammar
To learn the usage of it as an empty object.
To learn to describe the changes by using it as an empty object.
Learning objectives
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
Compare the sentences
a No visitor would think it surprising that the island is a
UNESCO World Heritage Site.
c Experts felt it necessary to come up with a plan to remove
all the rabbits from the island.
1 What does “it” refer to in sentences (a) and (c)
It refers to that clause in sentence (a) and an infinitive in sentence (c).
Compare the sentences
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”.
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.
Compare the sentences
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.
Look for more sentences
动词＋it＋形容词/名词＋(for/of sb)＋to do / that...
it 作 形式宾语
Summarise its use
it 作 形式宾语
1. 动词＋it＋形容词/名词＋(for/of sb)＋to do / that...
We make it a rule to visit the old every weekend.
我们规定每个周末都去看望那些老人们。
I don’t feel it difficult for me to tackle the problem.
我觉得解决这个问题并不难。
They considered it vital that they should keep their natural habitat. 他们认为保持它们的自然栖息地很重要。
It as an empty object
it 作 形式宾语
2.动词＋it＋no good / no use / useless / a waste of time /
worthwhile＋doing...
I’ll make it worthwhile telling me about his secret.
告诉我他的秘密，我会酬谢你的。
He thought it no use trying to multiply their number.
他认为企图增加它们的数量没有用。
it 作 形式宾语
3.动词 appreciate / hate / love / like / dislike后面接 if 或when引导的从句作宾语时，中间需用形式宾语it，构成“appreciate/hate/love/like/dislike＋it＋if/when从句”。
He will appreciate it if they assist him to tackle the difficult problem. 如果他们帮他解决这个难题，他将非常感激。
She hated it when he bragged that he was the most influential man in the district. 她讨厌他吹嘘自己是这个地区最有影响力的人。
it 作 形式宾语
4.一些“动词＋介词”构成的短语，如depend on，rely on，see to，stick to，take...for granted，owe...to sb/sth等后接 that 从句时，须用
it作形式宾语。
Would you see to it that she gets home early 你负责保证她早点到家，好吗？
You can’t depend on it that he will keep his promise that he will mount the top of the mountain. 你不能指望他会遵守他要登上山顶的诺言。
He owes it to his comrade’s help that he has made great progress in English. 他把在英语方面取得的巨大进步归功于朋友的帮助。
Summary
The red-eared slider, a species of freshwater turtle, is native to the
Southern United States and Northern Mexico. Due to its cute appearance,
many people think keeping this turtle as a pet is a good idea. Recent years
have seen more and more pet sliders escaping or being released from
homes, and some owners believe to release them into the wild is no big issue.
These days, people have found to release these turtles
into the wild is a threat to other species. Experts
consider owners keeping their pets in an enclosed
area important, and anyone unable to keep their pets
should take them to an appropriate animal shelter.
Rewrite the underlined parts using it as an empty object.
红耳滑水龟（巴西龟）
The red-eared slider, a species of freshwater turtle, is native to the Southern United States and Northern Mexico. Due to its cute appearance, many people think keeping this turtle as a pet is a good idea. Recent years have seen more and more pet sliders escaping or being released from homes, and some owners believe to release them into the wild is no big issue.
many people think it a good idea to keep this turtle as a pet.
Rewrite the underlined parts using it as an empty object.
believe it no big issue to release them into the wild
These days, people have found to release these turtles into the wild is a threat to other species. Experts consider owners
keeping their pets in an enclosed area important,
and anyone unable to keep their pets should take
them to an appropriate animal shelter.
Rewrite the underlined parts using it as an empty object.
红耳滑水龟（巴西龟）
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
Saihanba National Forest Park 塞罕坝国家森林公园
Located in Chengde City, Hebei Province, Saihanba 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.”
the Saihanba National Forest Park
塞罕坝国家森林公园（河北承德）
Describe the changes using it as an empty object.
present day
1960s
the Saihanba National Forest Park
塞罕坝国家森林公园（河北承德）
nouns / adjectives to do / that
breakthrough impossible likely unrealistic ... grow
investigate
plant trees
transform
...
I think it a breakthrough to transform a desert into a forest...
present day
1960s
the Saihanba National Forest Park
塞罕坝国家森林公园（河北承德）
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.
I think it likely to investigate the biodiversity in the Saihanba National Forest Park now.