高中英语 Unit 2 第三学时 Using Language课件 新人教版必修4.ppt
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英语英语·必修必修4（人教版）（人教版） 三学时 三学时 Using Language：：Reading，，Listening and Speaking 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 课课 前前热热 身身ⅠⅠ.单词默写单词默写(A)根据所给的词性和汉语意思写出下列单词根据所给的词性和汉语意思写出下列单词1．．________ vt.使迷惑；使为难使迷惑；使为难→→________adj.令人令人迷惑迷惑 不解的不解的→→______________adj.迷惑的；为难的迷惑的；为难的→→____________n．．混淆；困惑混淆；困惑2．．________vt.遗憾；惋惜遗憾；惋惜n.遗憾；懊悔遗憾；懊悔→→________adj.后悔的；遗憾的后悔的；遗憾的→→______________adv.后后悔地；惋惜地悔地；惋惜地3．．________adj.化学的；关于化学的化学的；关于化学的n.化学药品化学药品→→________n．．化学家；药剂师化学家；药剂师→→________n．．化学化学confuseconfusingconfusedconfusionregretregretfulregretfullychemicalchemist chemistry 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 课课 前前热热 身身4．．________n．．生产；制造生产；制造→→________ vt.生产；制生产；制造造n.产物；农产品产物；农产品→→____________n．．产品；产物产品；产物5．．________n．．营养；滋养；食物营养；滋养；食物→→______________adj.有营养的有营养的6．．________n．．发现；发觉发现；发觉→→________ vt.发现发现7．．________vt.减少；减缩减少；减缩→→____________n．．减少；减少；简化简化8．．________n．．总结；摘要；概要总结；摘要；概要→→________ vt.总总结；概括结；概括productionproduceproductnutritionnutritiousdiscoverydiscoverreducereductionsummarysummarize 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 课课 前前热热 身身 (B)根据所给的英文解释写出下列单词。
根据所给的英文解释写出下列单词1．．________：：very small living things related to plants，，some of which cause disease.2．．________：：a small animal or insect that destroys crops or food supplies.3．．________：：a substance that is formed naturally in the earth，，especially a solid substance such as coal，，salt，，stone，，or gold.4．．________：：the top layer of the earth in which plants grow.bacteriapestmineralsoil 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 课课 前前热热 身身5．．________：：the part of a plant that grows under the ground and gets water and nutrient from the soil.6．．________：：to read something quickly to find the main facts or idea in it.7．．________：：to draw a line under a word (or words) to show it is (they are) important.8．．________：：an opinion that you express about someone or something.rootskimunderlinecomment 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 课课 前前热热 身身9．．________：：to make sth.less or smaller in size，，quantity，，price，，etc..10．．________：：to give attention to one particular subject，，situation or person.reducefocus 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 课课 前前热热 身身ⅡⅡ.短语熟记短语熟记1．．__________逐渐增强；建立逐渐增强；建立2．．__________导致，造成导致，造成(后果后果)3．．__________集中集中(注意力、精力等注意力、精力等)于于4．．________________使使……免受免受(影响、伤害等影响、伤害等)5．．__________而且，另外而且，另外build uplead tofocus onkeep free of/fromin addition 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 课课 前前热热 身身ⅢⅢ.佳句背诵佳句背诵1．．_____________________(由于这些发现由于这些发现)，，some farmers and many customers are beginning______________________(转向转向)organic farming.2．．They______________________(着力于着力于)________their soil rich and__________________disease.(保持土壤肥沃，远离病害保持土壤肥沃，远离病害)。
3．．This also________the air，，soil，，water and crops____________chemicals.(免受免受……的影响的影响)With these discoveriesto turn tofocus on keepingfree ofkeepfree of/from 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 语语 篇篇理理 解解Task 1快速阅读课文快速阅读课文““Chemical or Organic Farming？？””，以约，以约30词写出文章的段落大意词写出文章的段落大意 温馨提示温馨提示：：本文是说明文，本文是说明文， 写摘要时要抓住文章写摘要时要抓住文章介绍的主要方面介绍的主要方面 Chemical fertilizers may stop crop diseases，，increase production but cause damage to the land and people while organic farming may keep the soil rich and free from chemicals. 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 语语 篇篇理理 解解Task 2仔细阅读仔细阅读““Chemical or Organic Farming？？””，根，根据课文内容选择正确答案。
据课文内容选择正确答案1．．From the passage，，we can see organic farmers are those who ________．．A．．grow crops with chemical fertilizersB．．grow crops with natural fertilizersC．．produce organic fertilizersD．．care for the environmentB 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 语语 篇篇理理 解解2．．From the fourth paragraph，，we know that ________．．A．．it's not good to plant grass between cropsB．．peanuts use the surface of soilC．．peas and soybeans should be grown together with corn and wheatD．．vegetables that put down deep roots are harmful to the soilB 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 语语 篇篇理理 解解3．．According to the text，，which of the following is NOT the problem caused by chemical fertilizer?A．．Crop diseases can be stopped.B．．Chemicals stay in the ground and underground water for a long time.C．．The helpful bacteria and pests are killed as well as the harmful one.D．．Many of these fertilizers are dangerous to people's health.A 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 语语 篇篇理理 解解4．．How many ways do the organic farmers have to keep their soil fertile and healthy? A．．3 B．．4 C．．5 D．．65. In what kind of magazine can we find the passage?A．．Sports. B．．Health.C．．Agriculture. D．．Science.AC 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 口口 语语 训训 练练Part A Role PlayPart A Role Play情景介绍：情景介绍：Alice向向George请教有关有机耕作的问题。
请教有关有机耕作的问题角色：角色：Alice和和George任务：任务：(1) 请根据中文提示提出问题请根据中文提示提出问题 (2) 请你的同学根据课文内容回答你的提问，然后你们互请你的同学根据课文内容回答你的提问，然后你们互换角色进行口语练习换角色进行口语练习 Q1: 为什么在耕作中使用化肥变得越来越普遍？为什么在耕作中使用化肥变得越来越普遍？________________________________________________________________________Q1：：Why are chemical fertilizers so popular in farming today?A1：：Because they are a great way to stop crop disease and increase production. 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 口口 语语 训训 练练Q2: 使用化肥会导致什么问题？使用化肥会导致什么问题？_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________Q2：：What problems can be caused by using chemical fertilizers?A2：：They can damage the land by killing helpful bacteria and pests and by staying in the ground and underground water for a long time.They damage people's health by building up in their bodies and leading to cancer or other illnesses. 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 口口 语语 训训 练练Q3: 什么是有机耕作？什么是有机耕作？_________________________________________________________________________________________________________________________________ Q4: 有机耕作有什么好处？有机耕作有什么好处？________________________________________________________________________Q3：：What is organic farming?A3：：Organic farming means growing crops without using any chemicals.Q4：：What are the advantages of using organic farming methods?A4：：The advantages of using organic farming methods are to grow good food and avoid damaging the environment or people's health. 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 Part B Retelling口口 语语 训训 练练 请用自己的话复述课文，你可以参照上述问题及其请用自己的话复述课文，你可以参照上述问题及其答案。
答案 关键词：关键词：chemical fertilizer(化学肥料化学肥料)；；increase(提提高高)；；damage(损害损害)；；organic(有机的有机的) ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________Many farmers use chemical fertilizers as a great way to stop crop disease and increase production.But they can damage the land and do harm to people's health，，even lead to cancer or other illnesses.As a result，，some farmers and many customers are beginning to turn to organic farming，， 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 口口 语语 训训 练练which means not using any chemicals.Due to the method of organic farming we now can grow good food.What's more，，we can avoid damaging the environment or people's health. 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 要要 点点讲讲 与与 练练1．．These chemicals in the food supply build up in people's bodies over time.(p.14)随着时间的推移，食物中的这些化学成分会在随着时间的推移，食物中的这些化学成分会在人体中堆积。
人体中堆积 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 词语链接词语链接要要 点点讲讲 与与 练练build up逐步；增强；增进；建立；开发逐步；增强；增进；建立；开发(1)You need more protein to build you up.你需要增加蛋白质以增强体质你需要增加蛋白质以增强体质2)He is now trying to build up a fine reputation.他正在努力逐步赢得好的声誉他正在努力逐步赢得好的声誉 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 即学即练即学即练要要 点点讲讲 与与 练练 完成下列句子完成下列句子1)Slowly a thick layer of fat________________ (越越聚越多聚越多) on the pan's surface.(2)Exercise will help________________ (增强增强) the muscles.(3)They have finally__________________ (建立建立) a big company.built upbuild upbuilt up 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 要要 点点讲讲 与与 练练2．．Many of these chemicals can lead to cancer or other illnesses.(p.14)许多这些化学药品会导致癌症或其它疾病的产生。
许多这些化学药品会导致癌症或其它疾病的产生 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 要要 点点讲讲 与与 练练词语链接词语链接lead to 导致；造成导致；造成(后果后果)；通往；通往lead sb.to 把某人带到把某人带到lead sb.to do sth.导致某人做某事导致某人做某事lead to sb.doing sth.导致某人做某事导致某人做某事(1)This misprint led to great confusion.这个印刷错误造成很大的混淆这个印刷错误造成很大的混淆2)His actions could lead to his losing his job.他的行为有可能会导致他丢了工作他的行为有可能会导致他丢了工作 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 要要 点点讲讲 与与 练练即学即练即学即练完成下列句子完成下列句子1)The events________________ the start of the First World War.(2)What led him__________(kill) his wife? (3)Too much work and too little rest often____________ illness.(4)Failure often lies in laziness while hard work ______________success.(5)The driver's carelessness___________________ the serious traffic accident.led toto killleads toleads toled to / resulted in 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 要要 点点讲讲 与与 练练3．．They focus on keeping their soil rich and free of disease.(p.14) 他们注重的是保持土壤肥沃并且免受病害。
他们注重的是保持土壤肥沃并且免受病害 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 要要 点点讲讲 与与 练练词语链接词语链接(A)focus vt.&vi.集中集中(注意力注意力)；聚焦；聚焦n．．[c，，u] 焦点；中心点焦点；中心点focus on集中于集中于focus (one's attention/mind/efforts) on集中集中(注意力注意力/心心思思/精力精力)于于(1)Focus your camera.把照相机的焦距调准把照相机的焦距调准2)Her beauty makes her the focus of attention.她长得漂亮，很惹人注目她长得漂亮，很惹人注目 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 要要 点点讲讲 与与 练练即学即练即学即练 按要求填空按要求填空1)The focus of recent research has been________(介词介词) environmental issues.(2)All eyes__________ (集中于集中于) her.(3)They focused their mind on________(do) the experiment.(B)keep...free from/of ＝＝ protect sb./sth.from...使使……免受免受(影响影响/伤害伤害)；使；使……不含不含(有害物有害物)on focused ondoing 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 要要 点点讲讲 与与 练练(1)We should keep ourselves free from drugs.我们应该远离毒品。
我们应该远离毒品2)I hope you will keep yourself free from tobacco and alcohol.我希望你不抽烟不喝酒我希望你不抽烟不喝酒 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 要要 点点讲讲 与与 练练即学即练即学即练根据句子意思填空根据句子意思填空1)We've managed to____________the garden__________weeds this year.(2)Relaxation exercises can__________your body__________ tension.keepfree ofkeepfree of 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 要要 点点讲讲 与与 练练4．．A healthy soil reduces disease and helps crops grow strong and healthy.(p.14)健康的土地能减少疾病并帮助庄稼长得更好。
健康的土地能减少疾病并帮助庄稼长得更好 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 要要 点点讲讲 与与 练练词语链接词语链接reduce vt.&vi.减少；减缩减少；减缩reduction n．缩减，减少，降低．缩减，减少，降低reduce sth.(from...to...)把某物从把某物从……减少到减少到……reduce sth.by...减少多少减少多少(1)He reduced his weight from 98 to 92 kilos/by 6 kilos.他把体重从他把体重从98公斤减少到公斤减少到92公斤公斤/减少减少6公斤2)The reform has reduced us to servants of the State.这一改革把我们都降为公务员了这一改革把我们都降为公务员了 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 要要 点点讲讲 与与 练练即学即练即学即练 根据句子意思填入正确的介词根据句子意思填入正确的介词1)We must reduce our expenses________300 yuan a month.(2)Their output has been reduced________10 percent.(3)He reduced his weight________6 kilos.tobyby 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 要要 点点讲讲 与与 练练5．．Swap summaries with your partner and give each other comments.(p.15) 和你的同伴交换摘要，并给出各自的评论。
和你的同伴交换摘要，并给出各自的评论 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 要要 点点讲讲 与与 练练词语链接词语链接comment vi.&vt.表达意见；作出评论表达意见；作出评论n．．[c，，u] 评论；议论评论；议论comment on/about sth./sb.对某事对某事/某人评论某人评论make comments/no comment on sth./sb.对某事对某事/某某人评论人评论/不进行评论不进行评论(1)The scandal caused a lot of comment.这件丑闻遭到很多议论这件丑闻遭到很多议论2)““Will you resign，，Minister？？”” ““No comment！！””““部长，你是要辞职吗？部长，你是要辞职吗？”“”“无可奉告无可奉告 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 要要 点点讲讲 与与 练练即学即练即学即练 按要求填空按要求填空1)Have you any comment(s)__________(make) on the recent developments? (2)Asked about the date of the election，，the Prime Minister______________ (发表意见发表意见) no decision had yet been made.(3)She was asked about the pay increase but____________________(不进行评论不进行评论) on it.to makecommented thatmade no comment 课前热身课前热身 语篇理解语篇理解 口语训练口语训练 要点讲与练要点讲与练 栏目链接 。
