Unit 5 Reading for Writing ppt课件-（2019）新人教版高中英语选择性必修第一册.pptx

1、Reading for Writing P55-57 Unit 5 Working the Land It is fertilizer. What is the substance we put on the soil to make crops grow? Pre-reading What kind of fertilizers do farmers use? chemical fertilizers natural fertilizers Whatre the advantages of organic farming? Do you usually eat organic food? D

2、o you think organic food are more healthy? What are the disadvantages of using chemical fertilizers? Thinkdiscuss Organic Farming Read the text: While-reading 1 Why did many farmers welcome the introduction of chemical farming? Many farmers welcomed them as a great way to fight crop diseases and inc

3、rease production. 2 What concerns many people about the use of pesticides? Their long-term use can sometimes harm both the land and peoples health. 3 What is one problem with the use of chemical fertilisers? Crops grown with them usually grow too fast to be rich in nutrition. Readanswer Readanswer 4

4、 How is organic farming different from chemical farming? Organic farming is simply farming without using any chemicals. Organic farmers focus on keeping their soil rich and free of diseases through natural means. 5 Why do organic farmers change the kind of crop grown in a field every year? Different

5、 crops are grown because they put important minerals back into the ground, making it ready for the next batch of crops. C Organic methods for producing rich soil D The problems with chemical farming Para. 1-2 Para. 3 Para. 4 Para. 5 Readmatch A What organic farming is B Why man-made chemicals are st

6、ill used in farming bacteria and insects prohibited damage they use grow too fast nutrition natural waste from animals every year different depths demand for food around the world Readcomplete change the kind of crop Chemical pesticides and artificial fertilisers have been in widespread use in farmi

7、ng. _ Pesticides can damage the land by killing only harmful bacteria and insects. _ Organic farmers focus on keeping their soil rich and free of disease through natural means. _ The goal of using different organic farming methods is to grow good food while avoiding damage to the environment or to p

8、eoples health. _ T T F T True or false not only.but also helpful ones What is the goal of using organic farming methods? Do you think it can be reached? Why or why not? Post-reading The goal of using organic farming methods is to grow good food while avoiding damage to the environment or to peoples

9、health. Yes, I think this goal can be reached.Farmers worked for centuries without using any kinds of chemicals and without harming the environment, and the food they produced was just fine. Unit 5 Working the Land Language points P55-56 课文回顾 句意： 这会影响到生长在土地上的农作物，反 过来也会影响到消化它们的动物和人类。 This affects the

10、 crops grown on the land and, in turn, the animals and humans who digest them. digest vt. 消化；吸收 n. 文摘；摘要 She couldnt digest food properly. 她无法正常消化食物。 They learn well but seem to need time to digest information. 他们学得很好，但似乎需要时间来吃透这些 知识。 句意： 这会影响到生长在土地上的农作物，反 过来也会影响到消化它们的动物和人类。 This affects the crops g

11、rown on the land and, in turn, the animals and humans who digest them. in turn 反过来；转而；轮流，依次 There were cheers for each of the women as they spoke in turn. 女士们依次发言时，每一位都得到了喝彩。 The rays, in turn, decimated the bay scallop populations around North Carolina. 反过来，这些鳐鱼又大量捕杀了北卡罗来纳 州周围的海湾扇贝。 There were alte

12、rnative methods of travel available. 有另外的旅行方式可采用。 Community service is seen as the only credible alternative to imprisonment. 除监禁外，社区劳动被看作是唯一可接受的选择。 As an alternative, some farmers have switched to organic farming, and many customers have turned to organic food when they shop at the local grocery. 句

13、意：作为一种选择，一些农民已经转向有机农 业，许多顾客在当地杂货店购买有机食品。 alternative n. 供替代的选择 adj. 供选择的；选择性的 坐在扶手椅上看书。 完成句子： We are very sad to have to do this, but there is no other alternative now. 我们为不得不这么做而感到难过，但是现在 没有其他的选择。 The soldier had no alternative but to obey orders. 士兵们除了服从命令别无选择。 Do you have an alternative solution?

14、 你有没有别的解决办法？ Why different crops are grown is because they put important minerals back into the ground, making it ready for the next batch of crops. 句意：种植不同的作物是因为它们把重要的 矿物质放回地下，使它为下一批作物再次做 好准备。 句子结构分析句子结构分析 why引导的主语从句引导的主语从句 because引导的表语从句引导的表语从句 现在分词作状语现在分词作状语 系动词系动词 发表议论就是通过议论或说理来表达作者的见解和 主张，作者对某一

15、问题持有一种看法，为了使读者 同意自己的看法，提出若干理由，试图说服别人。 发表议论时，我们要注意三个要素：论点、论据、 论证。 Write an argumentative essay giving your opinion on chemical or organic farming. 明确体裁话题 确定时态人称 布局文章架构 列出核心要点 Write an argumentative essay. 开头：介绍农业发展概况和有机农 业的出现。 展开论述：分层次介绍化学农业和 有机农业的区别，有机农业的优势。 结尾：总结观点，提出建议。 支持有机农业 文体：议论文 以现在时为主、兼顾过去时、

16、 将来时；第一、三人称 1.化学农业的缺点。 2.有机农业的优点，人们对健康的 重视和选择有机农业的理由。 Is the author of the passage for or against organic farming? How do you know? What other disadvantages of chemical farming did the author not list? How might the following items be problems and how important are they for organic farming? What oth

17、er disadvantages of organic farming can you think of ? Step 1 Discuss these questions in groups. Step 2 Decide whether your group supports chemical farming or organic farming. Topic sentence: In my opinion, _farming is preferable to _ farming because _ Point 1: _ （Detail）_ Point 2: _ （Detail）_ Point

18、 3: _ （Detail）_ Conclusion:_ Step 3 Use your outline to write a short essay giving your opinion on the topic. Sample Writing In my opinion, organic farming is preferable to chemical farming because of the benefts to the environment as to people, and because organic food is more nutritious. To begin

19、with, chemical farming harms the environment. Since chemical pesticides are not found in nature, normal natural processes cannot get rid of them. Instead, the chemicals tend to accumulate in the soil and water, and are absorbed in the food chain, where they poison wildlife and domestic animals. This

20、 affects us directly, because we end up eating plants, dairy products, eggs, and meat that have high levels of pesticides. Think about it: The purpose of the pesticides is to kill “pests”, that is, to kill insects. Something that can kill an insect probably is not healthy for a person to eat. While

21、it may be true that the food we eat does not have enough pesticide in it to kill us immediately, over the years this pesticide may cause us health problems or give us diseases such as cancer. Finally, organic food is generally more nutritious than food grown with man-made chemicals. If you remember

22、a few years ago, there was the case of watermelons literally exploding in the fields because they had been given chemicals to make them grow faster.The reason why they exploded was that they contained too much water, because the farmers had used too many chemicals and the weather was unusually wet.

23、As it turns out, such chemicals are commonly used in farming to grow larger crops more quickly. Do you really want to eat watered-down fruit and vegetables which have been rushed to market? They cannot possibly taste as good as organic vegetables, nor can they be as nutritious. In closing, I would l

24、ike to suggest buying organic food. Yes, the price is a little higher, but the small price we pay extra will bring us huge rewards in the end. Does the writer do a good job of expressing his/her opinion? Does each paragraph have one main idea? Does each paragraph have at least one detail to support its main idea? Does the writer sequence the points in a logical order? Does the writer do a good job persuading you to accept his/her opinion? Step 3 Exchange drafts with a partner. Step 4 Share your essay with the rest of the class. Thank you!