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(共26张PPT)
Lead in
Which tomatoes do you prefer Why
Chemical tomatoes
Organic tomatoes
Lead in
spray pesticides
use artificial fertilisers
use organic fertilizers
Which one is organic farming
×
×
√
Lead in
organic fertilizers
Predition
1.What is the text about
Chemical farming
versus organic farming
( definition, benefit , problem... )
Versus: 表示两队或双方对阵，对诉，对抗
2. What type of writing is it
A. Narration记叙文
B. Exposition说明文
C. Argumentation议论文
thanks
Fast-reading
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
Read for structure
The _______ and _________ of chemical farming.
benefits
problems
A __________: Organic farming.
A __________: Organic farming and
solution
how it keep the soil rich
solution
Conclusion
Read para.1 and para.3, and then answer the following questions.
Detailed-reading
1. What’s chemical farming
2. What’s organic farming
Para.1
Chemical farming is farming using chemical pesticides and artificial fertilizers.
Para.3
Detailed-reading
Para.2
3. What is the problem with the use of chemical fertilisers
4. Why do organic farmers change the kind of crop grown in a field every year
Detailed-reading
Para.4





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
contrast
illustrate
add
cause and effect
introduce a new topic
Language feature
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.
Writing
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. 提出争议点
There is a heated debate/discussion today about xxx
如今关于…… 存在一场热烈的争论。
开头段
Writing
1. 阐述观点一
Firstly, it is widely acknowledged that...首先，人们普遍认为……
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……
3. 举例论证
For example/instance,... 例如……
Writing
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……
结尾段
Writing
周一的班会课上你们班进行了“化学耕作和有机耕作的”话题讨论。大部分同学更喜欢有机耕作。讨论要点如下：
1．化学耕作使土地受损；长期食用化学耕作的食物有害健康，并且缺乏维生素和矿物质。
2．有机耕作使土地肥沃，并且阻止病虫害。
3．有机食品对我们健康有益。
注意：
1．词数80左右；
2．可以适当增加细节，使行文连贯。
Writing
Step 1　审题谋篇
体裁 议论文
话题 化学耕作和有机耕作
时态 一般现在时
人称 第一人称、第三人称
Writing
Step 2　词汇运用
1．化学耕作　　　　　 ________________
2．有机耕作 _______________
3．产品；产物 _______
4．化肥；肥料 __________
5．肥沃的；富饶的 _______
chemical farming
organic farming
product
fertilizer
fertile
Writing
Step 3　句式表达
1．完成句子
①我们大部分人认为有机耕作比化学耕作好。
Most of us consider organic farming ____________ chemical farming.
②化学耕作会导致很多问题。
Chemical farming can _______________________．
is better than
cause a lot of problems
Writing
③有机耕作能够帮助使土地肥沃，阻止病虫害。
Organic farming can help to _________________ and prevent the crops from disease.
④有机耕作使作物更健康和更强壮。
Organic farming makes the crops ____________________．
keep the soil fertile
healthier and stronger
Writing
2．句式升级
⑤用because连接句①和②。
________________________________________________________________________________________________________________________
⑥用therefore连接句③和④。
________________________________________________________________________________________________________________________
Most of us consider organic farming is better than chemical farming because chemical farming can cause a lot of problems.
Organic farming can help to keep the soil fertile and prevent the crops from disease, therefore it makes the crops healthier and stronger.
Writing
Step 4　连句成篇
We have had a heated discussion about chemical farming and organic farming.
我们就化学农业和有机农业进行了热烈的讨论。（P1：提出争议点）
Most of us consider organic farming is better than chemical farming，because chemical farming can cause a lot of problems. First，it can damage the land. Second，it will be bad for our health if we eat its products for long. Third，the products grown with chemical fertilizers contain too much water rather than vitamins and minerals.（P2:提出个人观点 1，并举例论证:化学农业的问题)
我们大多数人认为有机农业比化学农业好，因为化学农业会引起很多问题。首先，它会破坏土地。第二，如果我们长时间吃它的产品会对我们的健康有害。第三，用化肥种植的产品含有太多的水分，而不是维生素和矿物质。
Writing
However，organic farming is good for us. On the one hand，it can help to keep the soil fertile and prevent the crops from disease, it makes the crops healthy and strong. On the other hand, eating its products can do good to our health.
（阐述观点2，对比：有机农业的好处）
然而，有机农业对我们有好处。一方面，它可以帮助保持土壤肥沃，防止作物生病，因此它使作物健康强壮。另一方面，吃它的产品对我们的健康有好处。
So there are more and more people who are willing to eat organic farming products.（总结观点）
所以越来越多的人愿意吃有机农产品。
thanks

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