高一人教课标必修4 Unit 2 Working the land using language 课件
文档属性
| 名称 | 高一人教课标必修4 Unit 2 Working the land using language 课件 |
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| 格式 | zip | ||
| 文件大小 | 730.5KB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 人教版（新课程标准） | ||
| 科目 | 英语 | ||
| 更新时间 | 2017-12-23 00:00:00 | ||
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课件22张PPT。Chemical Or Organic Farming?Chemical Or Organic Farming? green food organic food Chemical Or Organic Farming?What do you think of the farming today?
healthy?
environment-friendly?
natural?
green?
transgenic?
chemical?
organic?
Fast reading:
Get the main idea of each paragraph.
para1: A new discovery of scientists.
para2: Several problems caused by using chemical fertilizers.
para3: The advantages of using organic farming.
para4: Some methods to keep the soil fertile.1 Why are chemical fertilizers so popular in farming today?
2 After the long-term use of chemical fertilizers, what have scientists found?Many farmers welcomed them as a great way to stop crop disease and increase production.
Long-term use of chemical fertilizers can cause damage to the land and , even more dangerous, to people’s health.Recently, however, therefore; meanwhile; anyhow; thus ;otherwise; moreover; besides etc.Careful readingTips: the usage of several adverbs means clear and reasonable connection between parts. Read paragraph 1and answer the following questions. Read paragraph 2 and find out the problems caused by using chemical fertilizers. There are three problems.First, they can damage … as well as …. They also stay in the … and …. In addition, …grow too fast to …. Tips: connectives（过渡词） and transitional phrases（过渡词） for development first;second; finally;last but not least ,etc.Read paragraph 3-4 What are the advantages of organic farming?
The farmers focus on keeping their soil rich and free of disease and keeping the air , soil, water and crops free from chemicals.Tips: several phrases can be used. The methods to keep the soil fertile
1 using natural waste from animals as fertilizer.
2 changing the kind of crop in each field .
3 planting crops to use different levels of soil
4 planting grass between crops to prevent … The same goal : ________________________
______________________________________
______________________________ to grow good food and to avoid damaging the environment or people’s health.Tips: infinitive” to” is used to express the purpose 1 …such as wheat or corn that need rich and fertile soil.
2 …planting peanuts that use the ground’s surface followed by vegetables that put down deep roots. Read the following sentence, and find what they have in common?Tips: clauses make the passage logical（逻辑的） and beautifulNoun Clauses & Attributive ClauseThe two sentences both include attibutive clause.para1: A new discovery of scientists.
para2: Several problems caused by using chemical fertilizers.
para3: The advantages of using organic farming.
para4: Some methods to keep the soil fertile.The structure of this passagePara1 Topic
Para2 Problems
Para3 Advantages
Para4 Several methods
illustration（阐明）
comparison
conclusionThe type of the article is_____________exposition（说明文）
请以“PLASTIC OR CLOTH BAGS?”为题模仿这篇文章的篇章结构和句子结构去写一篇说明文。
Discussion and practicePlastic Or Cloth Bags?
illustration（阐明）
comparison
conclusionPara1:
Para2:
Para3:
Para4: Have a brief illustration of the present situation.
The problems caused by using plastic bags.
The advanages of using cloth bags.
Conclusion.The following words may help you.Over the past half century, …have become very common …. …welcomed them as a … way to …. Recently, however, we have been finding that they can cause damage to …, even …, to people’s health.Homework :
Finish the writing .Over the past half century, …have become very common …. …welcomed them as a … way to …. Recently, however, we have been finding that they can cause damage to …, even …, to people’s health.
What are some of the problems caused by …? First,…
With these discoveries, …are beginning to turn to ….
….The following words may help you.Para1 Topic
Para2 Problems
Para3 Advantages
Para4 Several methods
Illustration（阐明）
comparison
conclusionThe type of the article is_____________Exposition（说明文）The structure of this passage Over the past half century, plastic bags have become very common in our daily life. We welcomed them as a convenient way to carry goods. Recently, however, we have been finding that they can cause damage to the environment, even worse, to people’s health. What are some of the problems caused by plastic bags? First, people often leave plastic bags here and there, making white pollution. Second, it takes a long time, more than 100 years ,to be exact, to break up .Last but not least, when heated, plastic bags can produce something harmful, which can build up in our body and eventually lead to cancer or other illnesses. With these discoveries, we are beginning to turn to cloth bags. They can be used many times. People can save a lot of source in this way. It is also a good idea to make some by ourselves, which is interesting.
Let’s use cloth bags in our daily life instead of plastic bags, not only for the environment protection, but also the sake of our health. What do you think of the farming today?
healthy?
environment-friendly?
natural?
chemical?
organic?
green?
transgenic?
healthy?
environment-friendly?
natural?
green?
transgenic?
chemical?
organic?
Fast reading:
Get the main idea of each paragraph.
para1: A new discovery of scientists.
para2: Several problems caused by using chemical fertilizers.
para3: The advantages of using organic farming.
para4: Some methods to keep the soil fertile.1 Why are chemical fertilizers so popular in farming today?
2 After the long-term use of chemical fertilizers, what have scientists found?Many farmers welcomed them as a great way to stop crop disease and increase production.
Long-term use of chemical fertilizers can cause damage to the land and , even more dangerous, to people’s health.Recently, however, therefore; meanwhile; anyhow; thus ;otherwise; moreover; besides etc.Careful readingTips: the usage of several adverbs means clear and reasonable connection between parts. Read paragraph 1and answer the following questions. Read paragraph 2 and find out the problems caused by using chemical fertilizers. There are three problems.First, they can damage … as well as …. They also stay in the … and …. In addition, …grow too fast to …. Tips: connectives（过渡词） and transitional phrases（过渡词） for development first;second; finally;last but not least ,etc.Read paragraph 3-4 What are the advantages of organic farming?
The farmers focus on keeping their soil rich and free of disease and keeping the air , soil, water and crops free from chemicals.Tips: several phrases can be used. The methods to keep the soil fertile
1 using natural waste from animals as fertilizer.
2 changing the kind of crop in each field .
3 planting crops to use different levels of soil
4 planting grass between crops to prevent … The same goal : ________________________
______________________________________
______________________________ to grow good food and to avoid damaging the environment or people’s health.Tips: infinitive” to” is used to express the purpose 1 …such as wheat or corn that need rich and fertile soil.
2 …planting peanuts that use the ground’s surface followed by vegetables that put down deep roots. Read the following sentence, and find what they have in common?Tips: clauses make the passage logical（逻辑的） and beautifulNoun Clauses & Attributive ClauseThe two sentences both include attibutive clause.para1: A new discovery of scientists.
para2: Several problems caused by using chemical fertilizers.
para3: The advantages of using organic farming.
para4: Some methods to keep the soil fertile.The structure of this passagePara1 Topic
Para2 Problems
Para3 Advantages
Para4 Several methods
illustration（阐明）
comparison
conclusionThe type of the article is_____________exposition（说明文）
请以“PLASTIC OR CLOTH BAGS?”为题模仿这篇文章的篇章结构和句子结构去写一篇说明文。
Discussion and practicePlastic Or Cloth Bags?
illustration（阐明）
comparison
conclusionPara1:
Para2:
Para3:
Para4: Have a brief illustration of the present situation.
The problems caused by using plastic bags.
The advanages of using cloth bags.
Conclusion.The following words may help you.Over the past half century, …have become very common …. …welcomed them as a … way to …. Recently, however, we have been finding that they can cause damage to …, even …, to people’s health.Homework :
Finish the writing .Over the past half century, …have become very common …. …welcomed them as a … way to …. Recently, however, we have been finding that they can cause damage to …, even …, to people’s health.
What are some of the problems caused by …? First,…
With these discoveries, …are beginning to turn to ….
….The following words may help you.Para1 Topic
Para2 Problems
Para3 Advantages
Para4 Several methods
Illustration（阐明）
comparison
conclusionThe type of the article is_____________Exposition（说明文）The structure of this passage Over the past half century, plastic bags have become very common in our daily life. We welcomed them as a convenient way to carry goods. Recently, however, we have been finding that they can cause damage to the environment, even worse, to people’s health. What are some of the problems caused by plastic bags? First, people often leave plastic bags here and there, making white pollution. Second, it takes a long time, more than 100 years ,to be exact, to break up .Last but not least, when heated, plastic bags can produce something harmful, which can build up in our body and eventually lead to cancer or other illnesses. With these discoveries, we are beginning to turn to cloth bags. They can be used many times. People can save a lot of source in this way. It is also a good idea to make some by ourselves, which is interesting.
Let’s use cloth bags in our daily life instead of plastic bags, not only for the environment protection, but also the sake of our health. What do you think of the farming today?
healthy?
environment-friendly?
natural?
chemical?
organic?
green?
transgenic?
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