外研版（2019）选择性必修第一册 Unit5 Revealing nature Using language 公开课课件(31张ppt)
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| 名称 | 外研版（2019）选择性必修第一册 Unit5 Revealing nature Using language 公开课课件(31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 | 2023-03-02 20:38:58 | ||
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(共31张PPT)
Unit 5 Revealing nature
Using language
目录页
Grammar
I
Homework
IV
Listening & speaking
II
Vocabulary building
III
contents
I
Grammar
a. Darwin suspected that the finches had evolved from a common ancestor …
b. Many people refused to believe that living things, including humans, had evolved from lower forms of life.
Grammar: Past perfect
Look at the sentences from the reading passage and answer the questions.
a. Darwin suspected that the finches had evolved from a common ancestor …
Grammar: Past perfect
1. In sentence (a), which action happened first, “suspected”
or “evolved from a common ancestor”
In sentence (a), “evolved from a common ancestor” happened first.
b. Many people refused to believe that living things, including humans, had evolved from lower forms of life.
Grammar: Past perfect
2. In sentence (b), which action happened first, “refused to
believe” or “evolved from lower forms of life”
In sentence (b), “evolved from lower forms of
life” happened first.
a. Darwin suspected that the finches had evolved from a common ancestor …
b. Many people refused to believe that living things, including humans, had evolved from lower forms of life.
Grammar: Past perfect
3. What does the structure had done indicate
It indicates the action happened before a certain past action.
过去完成时的基本用法：
1）表示在过去的某一时间或某一动作之前完成的动作或存在的状态，即“过去的过去”。
例如：
Grammar: Past perfect
a. 我们到达火车站之前，火车就已经离开了。
Before we got to the train station, the train _____________.
b. 我还没来得及说谢谢，他就跑开了。
Before I could say “thank you”, he ____________.
had already left
had run away
2）表示从过去某一时间开始，一直延续到过去的另一个时间的动作，常用的时间状语有 by then, by the end of, by the time。
例如：
Grammar: Past perfect
a. 到上学期期末为止，我们已经学习了2000个英语单词了。
By the end of last term, we _________ 2000 English words.
b. 到那时为止，他们已经在那里住了十年了。
They _________ there for ten years by then.
had learnt
had lived
3）表示愿望、打算等的动词，如 hope, want, expect, think, mean, suppose, intend, plan等后接从句时，一般用过去完成时表示本打算实现而未实现的愿望和计划。
例如：
Grammar: Past perfect
a. 我本打算去机场接他，但是我有个重要的会议要参加。
I ____________ to meet him at the airport, but I had an important meeting to attend.
b. 我原打算今年去度假，可是我离不开。
I __________ to take a holiday this year but I was not able to get away.
had intended
had hoped
4）在句型 hardly ... when 和 no sooner … than 中，主句用过去完成时，从句用一般过去时，表示“一……就……”。例如：
Grammar: Past perfect
a. 我刚离开就开始下雨了。
_______________ when it began to rain.
b. 他刚坐下，电话铃就响了。
No sooner ______________ than the telephone rang.
Hardly had I left
had he sat down
1. It was a young man who ________ medical school without completing his degree. What’s more, he ____________________ a letter from his father predicting that he would be “a disgrace to yourself and all your family”.
Grammar: Past perfect
Now look for more sentences with the past perfect tense in the reading passage, and summarize its use in your own words.
had left
had recently received
2. After Darwin __________ some time in South America, his room on the ship was crowded with samples of the plants and animals he _____________.
3. At that time, people believed that all species ____________ on Earth at the same time, and _________________since.
4. It seemed their beaks ____________ according to what food was available on that particular island.
Grammar: Past perfect
had spent
had collected
had appeared
had not changed
had evolved
Complete the paragraphs with the information from the given sentences. The sentences are in the order in which they happened. They can help you to decide the use of tenses.
1. a Natural disasters led to food shortages in the 1960s.
b Yuan Longping began to do research on hybrid rice.
c Yuan Longping developed a better type of rice.
Grammar: Past perfect
Complete the paragraphs with the information from the given sentences. The sentences are in the order in which they happened. They can help you to decide the use of tenses.
Grammar: Past perfect
Yuan Longping 1 _______ to do research on hybrid rice because natural disasters 2 __________ food shortages in the 1960s. In the end, he 3 ___________ a better type of rice.
began
had led to
developed
2. a Gregor Mendel chose to study pea plants because their
characteristics were easy to control.
b Gregor Mendel made important discoveries about
genetics.
c Gregor Mendel died in 1884.
Grammar: Past perfect
Gregor Mendel 4 _________ study pea plants because their characteristics were easy to control. By the time of his death in 1884, he 5 __________ important discoveries about genetics.
chose to
had made
Vocabulary building: Words & expressions about clubs
Complete the online encyclopaedia entry with the correct form of the words in the box.
compete decline
eat
live introduce
arrive
Lonesome George
Lonesome George was the
last Pinta island
tortoise. He died
in 2012. After
George’s death,
the Pinta island tortoise was declared extinct.
The extinction of the Pinta island tortoise is blamed on humans. Before humans 1 ________ on the island, the species 2 _________ in isolation and 3 ______ the plants that naturally grew there. George was discovered many years after their arrival, and by then humans 4 _____________ new species that 5 ___________ for the food the tortoises ate. After goats in particular had been brought to the Island, the Pinta island tortoise population 6 ________. Eventually, only George remained.
arrived
had lived
eaten
had introduced
competed
declined
compete decline eat live introduce arrive
Vocabulary building: Words & expressions about clubs
Work in pairs. Act out a role-play
using the information in Activity 3.
One of you will play the keeper of
Lonesome George, and the other
will play the reporter asking about
George. Use the past perfect tense
where appropriate.
Vocabulary building: Words & expressions about clubs
II
Listening & speaking
Listening & speaking: Biodiversity
1. Biodiversity is important.
2. Bacteria are always harmful to humans.
3. Some species of bacteria are used in food production.
4. Many species of bacteria recycle dead organic matter.
5. Our immune systems are able to fight off all germs.
Listen to the podcast and choose the statements that are made.
Listening & speaking: While-listening
Cells
Every living thing is 1 ______________.
They are like 2 ______________________________.
In the human body there are about 3 _____________ human cells and around 4 ________________bacteria cells.
Bacteria
Most bacteria in the human body can
5 ________________.
In the food production process, bacteria can
6 _______________ dead organic matter.
break down
help with digestion
thirty-nine trillion
thirty trillion
bricks that are used to build houses
made up of cells
Listening & speaking: After listening
Do you know about …
By the way, …
Actually, …
Have you heard of ...
In fact, …
Speaking of which, …
Do you know about …
Have you heard of …
By the way, …
Actually, …
In fact, …
Speaking of which, …
Checking background knowledge
Adding information
Complete the boxes with the expressions from the podcast.
Listening & speaking: Reading
Read the passage and answer the questions.
1. What species are mentioned and what is special about them
2. What other unusual life forms do you know of
Listening & speaking: Reading
1. What species are mentioned and what is special about them
2. What other unusual life forms do you know of
Two species are mentioned: the blue whale and the water bear. The blue whale is the largest animal species on Earth, which can grow up to almost 30 metres in length and weigh over 130,000 kilos. The water bear is probably the toughest species, which can survive temperatures from 150 ℃ to a below freezing -272℃.
III
Vocabulary building
Complete the paragraphs with the correct form of the words and expressions in the box.
Vocabulary building
The Galapagos islands are renowned worldwide for their unique biodiversity. The Giant Tortoise Reserve on Santa Cruz
1 _________ several species of giant tortoise that 2 ____________ the Galapagos islands.The island is also home to the Charles Darwin Research Station, where
3 _________ studies are carried out.
ancestor
scientific
be native to
primitive
habitat
appearance
be home to
ecosystem
is home to
are native to
scientific
Vocabulary building
Mangroves are one of the coastal plants
that grow on Isabela. They serve as the
4 ________ for various birds and fish, and are very important to the 5 _________.
habitats
ecosystem
Complete the paragraphs with the correct form of the words and expressions in the box.
ancestor
scientific
be native to
primitive
habitat
appearance
be home to
ecosystem
Vocabulary building
Iguanas can be found on San Cristobal. They have a very special 6 __________, with comb-like spines on the back. There is evidence that all the different iguanas have developed from more 7 _________ ones and share a common 8 _________.
appearance
primitive
ancestor
ancestor
scientific
be native to
primitive
habitat
appearance
be home to
ecosystem
Complete the paragraphs with the correct form of the words and expressions in the box.
IV
Homework
Look at the pictures of the species native to different regions of China. Talk about biodiversity in China using the words and expressions in this section. Do online research to find more information.
Homework
Unit 5 Revealing nature
Using language
目录页
Grammar
I
Homework
IV
Listening & speaking
II
Vocabulary building
III
contents
I
Grammar
a. Darwin suspected that the finches had evolved from a common ancestor …
b. Many people refused to believe that living things, including humans, had evolved from lower forms of life.
Grammar: Past perfect
Look at the sentences from the reading passage and answer the questions.
a. Darwin suspected that the finches had evolved from a common ancestor …
Grammar: Past perfect
1. In sentence (a), which action happened first, “suspected”
or “evolved from a common ancestor”
In sentence (a), “evolved from a common ancestor” happened first.
b. Many people refused to believe that living things, including humans, had evolved from lower forms of life.
Grammar: Past perfect
2. In sentence (b), which action happened first, “refused to
believe” or “evolved from lower forms of life”
In sentence (b), “evolved from lower forms of
life” happened first.
a. Darwin suspected that the finches had evolved from a common ancestor …
b. Many people refused to believe that living things, including humans, had evolved from lower forms of life.
Grammar: Past perfect
3. What does the structure had done indicate
It indicates the action happened before a certain past action.
过去完成时的基本用法：
1）表示在过去的某一时间或某一动作之前完成的动作或存在的状态，即“过去的过去”。
例如：
Grammar: Past perfect
a. 我们到达火车站之前，火车就已经离开了。
Before we got to the train station, the train _____________.
b. 我还没来得及说谢谢，他就跑开了。
Before I could say “thank you”, he ____________.
had already left
had run away
2）表示从过去某一时间开始，一直延续到过去的另一个时间的动作，常用的时间状语有 by then, by the end of, by the time。
例如：
Grammar: Past perfect
a. 到上学期期末为止，我们已经学习了2000个英语单词了。
By the end of last term, we _________ 2000 English words.
b. 到那时为止，他们已经在那里住了十年了。
They _________ there for ten years by then.
had learnt
had lived
3）表示愿望、打算等的动词，如 hope, want, expect, think, mean, suppose, intend, plan等后接从句时，一般用过去完成时表示本打算实现而未实现的愿望和计划。
例如：
Grammar: Past perfect
a. 我本打算去机场接他，但是我有个重要的会议要参加。
I ____________ to meet him at the airport, but I had an important meeting to attend.
b. 我原打算今年去度假，可是我离不开。
I __________ to take a holiday this year but I was not able to get away.
had intended
had hoped
4）在句型 hardly ... when 和 no sooner … than 中，主句用过去完成时，从句用一般过去时，表示“一……就……”。例如：
Grammar: Past perfect
a. 我刚离开就开始下雨了。
_______________ when it began to rain.
b. 他刚坐下，电话铃就响了。
No sooner ______________ than the telephone rang.
Hardly had I left
had he sat down
1. It was a young man who ________ medical school without completing his degree. What’s more, he ____________________ a letter from his father predicting that he would be “a disgrace to yourself and all your family”.
Grammar: Past perfect
Now look for more sentences with the past perfect tense in the reading passage, and summarize its use in your own words.
had left
had recently received
2. After Darwin __________ some time in South America, his room on the ship was crowded with samples of the plants and animals he _____________.
3. At that time, people believed that all species ____________ on Earth at the same time, and _________________since.
4. It seemed their beaks ____________ according to what food was available on that particular island.
Grammar: Past perfect
had spent
had collected
had appeared
had not changed
had evolved
Complete the paragraphs with the information from the given sentences. The sentences are in the order in which they happened. They can help you to decide the use of tenses.
1. a Natural disasters led to food shortages in the 1960s.
b Yuan Longping began to do research on hybrid rice.
c Yuan Longping developed a better type of rice.
Grammar: Past perfect
Complete the paragraphs with the information from the given sentences. The sentences are in the order in which they happened. They can help you to decide the use of tenses.
Grammar: Past perfect
Yuan Longping 1 _______ to do research on hybrid rice because natural disasters 2 __________ food shortages in the 1960s. In the end, he 3 ___________ a better type of rice.
began
had led to
developed
2. a Gregor Mendel chose to study pea plants because their
characteristics were easy to control.
b Gregor Mendel made important discoveries about
genetics.
c Gregor Mendel died in 1884.
Grammar: Past perfect
Gregor Mendel 4 _________ study pea plants because their characteristics were easy to control. By the time of his death in 1884, he 5 __________ important discoveries about genetics.
chose to
had made
Vocabulary building: Words & expressions about clubs
Complete the online encyclopaedia entry with the correct form of the words in the box.
compete decline
eat
live introduce
arrive
Lonesome George
Lonesome George was the
last Pinta island
tortoise. He died
in 2012. After
George’s death,
the Pinta island tortoise was declared extinct.
The extinction of the Pinta island tortoise is blamed on humans. Before humans 1 ________ on the island, the species 2 _________ in isolation and 3 ______ the plants that naturally grew there. George was discovered many years after their arrival, and by then humans 4 _____________ new species that 5 ___________ for the food the tortoises ate. After goats in particular had been brought to the Island, the Pinta island tortoise population 6 ________. Eventually, only George remained.
arrived
had lived
eaten
had introduced
competed
declined
compete decline eat live introduce arrive
Vocabulary building: Words & expressions about clubs
Work in pairs. Act out a role-play
using the information in Activity 3.
One of you will play the keeper of
Lonesome George, and the other
will play the reporter asking about
George. Use the past perfect tense
where appropriate.
Vocabulary building: Words & expressions about clubs
II
Listening & speaking
Listening & speaking: Biodiversity
1. Biodiversity is important.
2. Bacteria are always harmful to humans.
3. Some species of bacteria are used in food production.
4. Many species of bacteria recycle dead organic matter.
5. Our immune systems are able to fight off all germs.
Listen to the podcast and choose the statements that are made.
Listening & speaking: While-listening
Cells
Every living thing is 1 ______________.
They are like 2 ______________________________.
In the human body there are about 3 _____________ human cells and around 4 ________________bacteria cells.
Bacteria
Most bacteria in the human body can
5 ________________.
In the food production process, bacteria can
6 _______________ dead organic matter.
break down
help with digestion
thirty-nine trillion
thirty trillion
bricks that are used to build houses
made up of cells
Listening & speaking: After listening
Do you know about …
By the way, …
Actually, …
Have you heard of ...
In fact, …
Speaking of which, …
Do you know about …
Have you heard of …
By the way, …
Actually, …
In fact, …
Speaking of which, …
Checking background knowledge
Adding information
Complete the boxes with the expressions from the podcast.
Listening & speaking: Reading
Read the passage and answer the questions.
1. What species are mentioned and what is special about them
2. What other unusual life forms do you know of
Listening & speaking: Reading
1. What species are mentioned and what is special about them
2. What other unusual life forms do you know of
Two species are mentioned: the blue whale and the water bear. The blue whale is the largest animal species on Earth, which can grow up to almost 30 metres in length and weigh over 130,000 kilos. The water bear is probably the toughest species, which can survive temperatures from 150 ℃ to a below freezing -272℃.
III
Vocabulary building
Complete the paragraphs with the correct form of the words and expressions in the box.
Vocabulary building
The Galapagos islands are renowned worldwide for their unique biodiversity. The Giant Tortoise Reserve on Santa Cruz
1 _________ several species of giant tortoise that 2 ____________ the Galapagos islands.The island is also home to the Charles Darwin Research Station, where
3 _________ studies are carried out.
ancestor
scientific
be native to
primitive
habitat
appearance
be home to
ecosystem
is home to
are native to
scientific
Vocabulary building
Mangroves are one of the coastal plants
that grow on Isabela. They serve as the
4 ________ for various birds and fish, and are very important to the 5 _________.
habitats
ecosystem
Complete the paragraphs with the correct form of the words and expressions in the box.
ancestor
scientific
be native to
primitive
habitat
appearance
be home to
ecosystem
Vocabulary building
Iguanas can be found on San Cristobal. They have a very special 6 __________, with comb-like spines on the back. There is evidence that all the different iguanas have developed from more 7 _________ ones and share a common 8 _________.
appearance
primitive
ancestor
ancestor
scientific
be native to
primitive
habitat
appearance
be home to
ecosystem
Complete the paragraphs with the correct form of the words and expressions in the box.
IV
Homework
Look at the pictures of the species native to different regions of China. Talk about biodiversity in China using the words and expressions in this section. Do online research to find more information.
Homework