资源简介

(共19张PPT)
UNIT 5 WORKING THE LAND
Using Language:
Chemical Versus Organic Farming
Know the difference between chemical farming and organic farming and the structure of an argumentative essay;
Write an argumentative essay using what they will learn in this period.
Learning Objectives
Imagine now you are a farmer who has a lot of fields.
How do you grow crops
What do farmers do to boost yields
plough
sow
fertilize the soil
kill off the pest
water the crop
rid the soil of the weed
Lead-in
spray pesticides
use artificial fertilisers
use organic fertilizers
Which one is organic farming
×
×
√
Lead-in
Make a predication according to the photo and the title.
1. What is the text about
Chemical farming
versus organic farming
2. What type of writing is it
A. Narration
B. Exposition
C. Argumentation
Prediction
Choose the main ideas (A-D)below with the paragraphs.
A What organic farming is
B Why man-made chemicals are still used in farming
C Organic methods for producing rich soil
D The problems with chemical farming
D The problems with chemical farming
A What organic farming is
C Organic methods for producing rich soil
B Why man-made chemicals are still used in farming
Text type:
Argumentation
Fast-reading
Title
The _______ and _________ of chemical farming.
benefits
problems
Part 1:
(Para 1&2)
What organic farming is and __________________.
how it keep the soil rich
Part 2:
(Para 3&4)
Part 3:
(Para 5)
Conclusion
READ FOR STRUCTURE
Fast-reading
What is chemical farming What is organic farming
Organic farming is simply farming ________________
Chemical farming is farming with _________ , especially ___________________ and _________________.
chemicals
chemical
pesticides
artificial fertilizers
without chemicals .
Para.1
Para.3
Read para.1 and para.3, and then answer the following questions.
while
Detailed-reading
3. What is one problem with the use of chemical fertilisers
Crops grown with them usually grow too fast to be rich in nutrition.
Para.2
Detailed-reading
5. Why do organic farmers change the kind of crop grown in a field every year
Different crops are grown because they put important minerals back into the ground, making it ready for the next batch of crops.
Para.4
Detailed-reading
Read the passage again. Find the discourse markers in the text and complete the table according to the classification.
contrast
illustrate
add
cause and effect
introduce a new topic
however, but, on the contrary, instead, on one hand … on the other hand
for example, for instance, in fact, such as, take … for example
both…and…, not only…but also, in addition, and, also, as well, what’s more, besides, furthermore, moreover, what’s worse
why…is because…, therefore, for this reason, thus, consequently, as a ressult
as for, as an alternative
Post-reading
What’s the author’s attitude towards chemical farming and organic farming
A.Negative B. ambiguous
C. objective D. supportive
What ’s your opinion on chemical or organic farming
Let’s write an argumentative passage about it.
Post-reading
1.Structure of an argumentative essay:
(Para.1)
(Para.2)
An argumentative essay
Your opinion
Supporting point2
(Para.3)
Supporting point3
Supporting point1
Introduction
Body
Conclusion
Summary
Title
Details
Details
Details
Writing
1. 引出话题
Recently, the issue of...has been brought into public focus.
最近，…… 的问题已成为公众关注的焦点。
In recent years, there has been a growing concern about...
近年来，人们越来越关注……
2. 提出争议点
There is a heated debate/discussion today about whether...
如今关于是否…… 存在一场热烈的争论。
Different people hold different views on the question of...
对于…… 的问题，不同的人有不同的看法。
开头段
Sentence patterns
1. 阐述观点一
Firstly, it is widely acknowledged that...首先，人们普遍认为……
To begin with, one of the main reasons is that...首先，主要原因之一是……
中间段
2. 阐述观点二（对比或补充）
However, on the other hand, some people argue that...
然而，另一方面，一些人认为……
Nevertheless, there are also those who believe that...不过，也有人认为……
3. 举例论证
For example/instance,... 例如……
A case in point is that... 一个恰当的例子是……
Sentence patterns
1. 总结观点
In conclusion, taking all these factors into consideration, we may reasonably draw the conclusion that...
总之，考虑到所有这些因素，我们可以合理地得出结论……
To sum up, both sides have their merits. But from my perspective,...
总而言之，双方都有其优点。但在我看来……
结尾段
2. 提出建议或展望
It is high time that we took some effective measures to...
是时候我们采取一些有效措施来……
Only in this way can we...只有这样我们才能……
Sentence patterns
近年来，媒体对“农业可持续发展” “食品安全”等问题作了一些报道，引发了许多讨论，化学种植和有机种植哪种有利于农业可持续发展并解决食品安全问题呢？请用英语写一篇议论文，表达自己的观点，并说明理由。
Writing Task
In my opinion, organic farming is preferable to chemical farming because it’s beneficial to both people’s health and the environment, and favorable to sustainable development of agriculture.
To begin with, chemical farming harms the environment. For instance, the chemicals tend to accumulate in the soil and water, and are absorbed in the food chain, where they poison wildlife and domestic animals.What’ s more, there is no doubt that the chemicals staying inside the crops can cause us health problems or give us diseases such us cancer. Finally, organic produce simply uses natural fertilizers, making vegetables and fruit tasty and nutritious.
In summary, I’m convinced that organic food will be more and more popular. Although the price is a little higher, but the small price we pay extra will bring us huge rewards in the future.
Sample
Thanks!

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