2014-2015学年高中英语配套课件：必修4 UNIT 2 SECTION Ⅲ（人教版重庆专用）.ppt

1、课前自主导学考点难点易混点解码书面表达Unit 2 Working the land Section Using Language 课件（人教版必修4，重庆专用）课前自主导学考点难点易混点解码书面表达.阅读理解Using chemical fertilizers is popular because it can stop crop disease and increase_1_，but longterm use of these fertilizers can cause damage to the land and even to peoples health.Organic farmin

2、g is to grow crops with natural but not_2_fertilizers.Organic farmers _3_keeping their soil rich and _4_disease.They prefer using natural waste from animals as fertilizers.They think this makes the soil in their fields _5_ minerals and so more _6_.课前自主导学考点难点易混点解码书面表达Organic farmers also use many oth

3、er methods to keep the soil fertile.They often change the kind of crop in each field_7_，or plant crops to use different_8_ of soil，or plant grass between crops to prevent wind or water from _9_ the soil.However，these methods have the same goal：to grow good food and avoid damaging the _10_ or peoples

4、 health.答案1.production2.chemical3.focus on4.free of/from5.richer in6.fertile7.every few years8.levels9carrying away10.environment课前自主导学考点难点易混点解码书面表达.教材研读一、重点单词熟记1_(adj.)化学的；关于化学的_(n.)化学2_(n.)生产；制造_(v.)生产3_(vt.)发现_(n.)发现；发觉4_(vt.)减少；减缩_(n.)减少5_(n.)营养；滋养；食物6_(vt.)画底线标出；强调7_(n.)总结；摘要；概要8_(n.)评论；议论(vi.&

5、vt.)表达意见；作出评论课前自主导学考点难点易混点解码书面表达答案 1.chemical；chemistry2.production；produce3discover；discovery4.reduce；ment课前自主导学考点难点易混点解码书面表达二、重点短语探究1build_ 逐渐增强；建立；开发2lead_ 导致；造成(后果)3focus_ 集中(注意力、精力等)于4keep.free_ 使免受(影响、伤害等)；使不含(有害物)5cause damage_ 对造成损害6_ addition 此外；另外答案 1.up2.to3.on4.from/of5.to6.in课前自主导学考点难点易

6、混点解码书面表达三、教材佳句背诵1Recently，however，scientists_that longtermuse of these fertilizers can cause damage to the land and，even more dangerous，to peoples health.然而，最近科学家发现长期使用这些肥料会造成土地受损，甚至更危险的是，会对人们的健康造成危害。2 With these discoveries，some farmers and many customers _organic farming.由于这些发现，一些农民和很多消费者开始转向有机耕作。

7、课前自主导学考点难点易混点解码书面表达3A healthy soil_disease and helps crops_.肥沃的土壤减少了病虫害并且有助于农作物的茁壮成长。4This also_the air，soil，water and crops_ chemicals.这有助于空气、土壤、水和农作物免受化学物质的污染。答案 1.have been finding2.are beginning to turn to3reduces；grow strong and healthy4.keeps；free from课前自主导学考点难点易混点解码书面表达1build up逐渐增强；建立；开发Thes

8、e chemicals in the food supply build up in peoples bodies over time.食物中的这些化学物质会在人体中逐渐积累。lm very glad to see that your vocabulary is gradually building up.看到你的词汇量在逐渐增加，我很高兴。He has built up a good business over the years.几年来他生意做得很兴旺。Hard working conditions build up character.(喻)艰苦的工作条件能磨炼人的性格。课前自主导学考点

9、难点易混点解码书面表达【即境活用】写出下列各句中画线部分的汉语意思To learn a language well you must build up a useful vocabulary.()Promote physical culture and build up the peoples health.()答案 逐渐积累有用的词汇 增强人民体质课前自主导学考点难点易混点解码书面表达2lead to导致，造成(后果)；通往Many of these chemicals can lead to cancer or other illnesses.这些化学物质中有很多会引起癌症或其他疾病。To

10、o much work and too little rest can lead to illness.过量的工作和过少的休息会引发疾病。The road leads to the foot of the hill.这条路通往山脚下。名师点睛：lead to中的to是介词，后面应该接名词或动名词作宾语。与result in/bring about同义，意为：导致。课前自主导学考点难点易混点解码书面表达【即境活用】一句多译食用过多的糖会引起健康问题。_答案 Eating too much sugar can result in health problems.Eating too much su

11、gar can lead to health problems.Eating too much sugar can bring about health problems.课前自主导学考点难点易混点解码书面表达3focus n焦点；中心点 vt.集中；聚焦focus on集中(注意力、精力等)于They focus on keeping their soil rich and free of disease.他们主要是想保持土壤肥沃且免受病害。She was the focus of everyones attention.她是大家注意的焦点。I am too tired to focus o

12、n anything.我太累了，不能集中精神了。课前自主导学考点难点易混点解码书面表达【拓展】All our eyes were focused on the speaker.大家的目光都集中在发言人身上。The focus of this chapter is the American Revolution.本章的重点是美国独立战争。课前自主导学考点难点易混点解码书面表达【即境活用】英汉互译请集中精力思考下列问题。_She always wants to be the focus of attention._答案Please focus your minds on the following

13、 problems.她总想成为人们关注的焦点。课前自主导学考点难点易混点解码书面表达4reduce vt.减少；减缩A healthy soil reduces disease and helps crops grow strong and healthy.肥沃的土壤减少了病害并且有助于农作物的茁壮成长。We were hoping that they would reduce the rent a little.我们希望他们会把租金降低一点。The workforce has been reduced by half.劳动力已经减少了一半。The price of that type of

14、colour TV has been reduced to 1,000 yuan.那种型号的彩电的价格已经下降到了一千元。课前自主导学考点难点易混点解码书面表达课前自主导学考点难点易混点解码书面表达【即境活用】根据句意填入reduce的适当搭配The price _ ten percent.价格下降了10%。In the old society he _ finally _ begging.在旧社会，他最后被逼得讨饭。They _ the expenses _ 60 percent.他们将开支压缩了60%。答案was reduced bywas；reduced toreduced；by课前自主

15、导学考点难点易混点解码书面表达5keep.free from/of使免受(影响、伤害等)；使不含(有害物)This also keeps the air，soil，water and crops free from chemicals.这也使空气、土壤、水和农作物免受化学物质的污染。Youd better keep this area free of air pollution.你们最好让这个地区免受空气污染。课前自主导学考点难点易混点解码书面表达【拓展】(1)keep sb/sth from doingprevent/stop sb/sthfrom doing阻止某人干某事/防止某事发生(2

16、)keep sth from sb不想将某事告诉某人；将某事瞒着某人(3)free vt.释放free sth from把从释放出来；使摆脱课前自主导学考点难点易混点解码书面表达I just managed to keep myself from falling down.我努力不让自己摔倒。She knew that he was keeping something from her.她知道他有事瞒着她。They freed the birds from the cages.他们把鸟儿从笼子里放出来了。课前自主导学考点难点易混点解码书面表达【即境活用】完成句子He wants to _ so

17、me of his responsibilities.他想摆脱他的某些责任。I hope Im not_doing your work.希望我没有妨碍你工作。答案 keep himself free fromkeeping you from课前自主导学考点难点易混点解码书面表达6comment n评论；议论vi.&vt.表达意见；作出评论Swap summaries with your partner and give each other comments.与你的搭档交换概要，然后相互作出评论。课前自主导学考点难点易混点解码书面表达课前自主导学考点难点易混点解码书面表达【即境活用】根据语境填

18、空Do you have anything to say about the matter?对于这件事你有什么要说的吗？Sorry，_！对不起，无可奉告！句型转换The old lady likes making comments on/about what she has seen.The old lady likes_what she has seen.答案 no commentcommenting on课前自主导学考点难点易混点解码书面表达7They feel that this makes the soil in their fields richer in minerals and

19、so more fertile.他们觉得这可以让地里的土壤更富含矿物质，从而变得更肥沃。【分析】(1)此句为主从复合句。(2)句中“makes the soil in their fields richer in minerals and so more fertile”为make复合宾语。其中“richer in minerals and so more fertile”为宾语补足语。课前自主导学考点难点易混点解码书面表达课前自主导学考点难点易混点解码书面表达【即境活用】仿写句子他们觉得这让他们更加幸福快乐。_答案They feel that this makes them happier

20、and more cheerful.课前自主导学考点难点易混点解码书面表达8Crops such as peas or soybeans put important minerals back into the soil，making it ready for crops such as wheat or corn that need rich and fertile soil.像豌豆或大豆这样的农作物将重要的矿物质带回土壤，从而使之适宜于要求土壤肥沃的农作物，比如小麦或玉米。课前自主导学考点难点易混点解码书面表达【分析】(1)此句为主从复合句。(2)句中含有that引导的定语从句，修饰先行词

21、crops，并且that在从句中充当主语。(3)句中“making it ready.”为现在分词短语作结果状语。现在分词作结果状语，相当于一个并列谓语，描述谓语动作发生后所带来的一种自然而然的结果。Many people from all over the world have moved to America，making it the most multicultural country in the world.来自世界各地的很多人去了美国，使之成为世界上最多元文化的国家。He cut off the wire，preventing a big fire.他剪断电线，阻止了一场大火。课

22、前自主导学考点难点易混点解码书面表达【即境活用】_ in a long queue，we waited for the store to open to buy a New iPad.(2012陕西高考)AStanding BTo standCStood DStand解析考查非谓语动词。句意：我们站在长长的队伍中等商店开门了买新款iPad。逻辑主语we与动词stand之间为主谓关系，故用现在分词短语作伴随状态。答案 A课前自主导学考点难点易混点解码书面表达定语从句(2)非限制性定语从句应用透析：非限制性定语从句是对被修饰部分进行附加说明，如果去掉，主句的意思仍然完整或清楚。它和主句之间的关系比

23、较松散，因此常用逗号隔开。不用that引导。课前自主导学考点难点易混点解码书面表达【语境感悟】1As we know，littering pollutes the environment.(2012辽宁)2Last night，I lost my ID card in our campus，which really makes me worried.(2011全国)3For lunch，we will prepare dumplings and noodles，which are typical food of China.(2011天津)4I know they are troubled b

24、y poverty and diseases，many of whom even have dropped out of school.(2011上海)5May 12,2008 was an unforgettable day，when a severe earthquake destroyed almost everything in the school.(2011福建)课前自主导学考点难点易混点解码书面表达【学以致用】1出乎我们的意料，天气非常好。_2众所周知，月亮围绕地球转。_3我妈妈有本好书，但书的封皮很可怕。_4我们不应该把钱花在给这么多人体检上，他们大部分都很健康。_5他写的作文

25、最好，这让我们很意外。_课前自主导学考点难点易混点解码书面表达答案1.The weather turned out to be very good，which was more than we could expect.2As is known to all，the moon travels round the earth.3My mother has a good book，whose cover looks terrible.4We shouldnt spend our money testing so many people，most of whom are healthy.5He wr

26、ote the best composition，which surprised all of us.课前自主导学考点难点易混点解码书面表达假设你是李华，请就食品卫生问题，给某报社英文栏目编辑写一封100词左右的信，内容要点如下：1你的邻居因食用从市场买回来的伪劣食品中毒；2你目睹了他们中毒及在邻里帮助下脱险的经过；3呼吁社会各界重视食品卫生与安全；打击牟取暴利的不法商贩。注意：信的开头与落款已给出，不计入总词数。参考词汇：伪劣食品fake food；卫生hygiene【提高训练】课前自主导学考点难点易混点解码书面表达Dear editor，Im writing to tell you abo

27、ut a food poisoning incident._Yours，Li Hua课前自主导学考点难点易混点解码书面表达【参考范文】Dear editor，Im writing to tell you about a food poisoning incident.Several days ago，my neighbor family ate a bag of fake food from the market.After the meal，they had stomachaches and brought up what they had eaten as their faces turn

28、ed pale.Fortunately，another neighbor passed by only to find the accident and immediately called the ambulance，which carried them quickly to hospital.Afterseveral hours treatment they finally escaped from death.课前自主导学考点难点易混点解码书面表达From this all of us have realized the importance of food safety.As some

29、 illegal businessmen are only interested in making profits in the race to become rich quickly，they seldom care about the necessary safety measures and hygiene or care what happens to consumers.They must be charged by law.Meanwhile I do hope the whole society shall begin taking action to protect peoples life safety.Yours，Li Hua课前自主导学考点难点易混点解码书面表达提 示课后完成活页规范训练Unit 2(2)