英语一轮ppt课件必修四.ppt

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1、必修四Unit 2Working the land,1.课前自测2.课堂学案,课前自测,Key:1.hunger;hungry2.discovery;discover;discoverer3.freedom;free;freely4.chemical;chemistry;chemist5.equip;equipped;equipment6.occupation;occupy;occupied7.disturbing;disturbed;disturb,Key:8.export;export;import;import9.confuse;confusing;confused;confusion1

2、0.production;produce;producer;product,Key:1.由于他的研究2.with3.focus on4.than give in5.of6.lead to 7.up8.free from9.耕种土地10.为了生计而努力,Key:1.for whom2.what is called3.makes it possible4.to increase;without expanding 5.twice as large as,Key:1.finding2.the3.parts4.to increase5.could6.however7.that 8.developing

3、9.hunger10.as,Yuan Longping was born in 1930.Since he graduated from Southwest Agricultural College in 1953,he has devoted his life to _1_(find)ways to grow more and more rice.As a young man,he saw _2_ great need for increasing the rice output.At that time hunger was a serious problem in many _3_(pa

4、rt)of the countryside.Yuan searched for a way _4_(increase)rice harvests without expanding the areas of the fields.In 1950,Chinese farmers _5_ produce about 56 million tons of rice.In a recent harvest,_6_，nearly 200 million tons of rice were produced.These increased harvests mean _7_ 22%of the world

5、s people are fed from just 7%of the farmland in the world.Yuan Longping is now circulating his knowledge in India and many other _8_(develop)countries to increase their rice harvests.Thanks to his research,the UN is trying to rid the world of _9_(hungry).Using his hybrid rice,farmers are producing h

6、arvests twice as large _10_ before.,阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。,课堂学案,1.struggle vi.&n.斗争；拼搏；努力；挣扎,1.(2013江西卷)They have to struggle for their independence.他们不得不为他们的独立而斗争。2.(2015陕西卷)Robinson suggested that may be because parents themselves struggle to understand the tasks.罗宾逊认为那可能是因为父母自己在努力地去

7、理解这些任务。3.Lisa struggled with her conscience before talking to the police.丽莎经过一番良心上的斗争，终于向警方交代了。4.The wounded young man struggled to his feet.那位受伤的年轻人挣扎着站了起来。,【词块助记】,struggle to do sth.艰难地做某事；挣扎着做某事struggle for sth.为而斗争struggle with/against sb./sth.与作斗争；同搏斗struggle on 在困难中坚持；勉力维持struggle to ones feet

8、 挣扎着站起来,1.Being struggled along for several days,he suddenly fell down and died.2.Ann,having struggled for months to find a place to live,finally rent a small apartment in downtown.Key：1.Being 改为Having2.rent改为rented,【词块助记】,2.reduce vt.减少；缩减；使陷入某种更糟的状态,1.(2015海南卷)A home environment in blue can help p

9、eople reduce food intake.蓝色的居家环境能帮助人们减少食物的摄入量。2.(2014全国卷)The number of cities producing CO beyond the standard has been reduced from 40 to 9.一氧化碳排放量超标的城市的数量已经从40个减少到9个。3.His bad behavior reduced me to despair.他的恶劣行为使我陷入绝望。1,reduce sth.to 把减少到reduce sth.by 使减少了reduceto/be reduced to(介词)沦落为；使陷入某种状态,1.

10、(2013湖北卷改编)A public-health campaign has greatly reduced the number of heart disease deaths with 80 percent over the past three decades.2.The poor boy is reduced to _(beg)in the street.Key：1.with 改为by2.begging,【词块助记】,3.equip vt.装备；配备；使(某人)具备条件,1.(2013上海卷)The goal is eventually to equip it with a buil

11、t-in power source.目标是最终给它装上内置电源。2.Equipped with new scientific farming methods,they have been able to use less farmland than in the past.因为掌握了科学的农耕新方法，他们已经可以用比过去更少的农田进行耕种。,equip sb.for/to do sth.使某人具备做某事的条件；使某人能够做某事equipwith 用装备be equipped with 装备着,【拓展】equip 多用于被动语态和with 搭配。类似的结构还有：be filled with,be

12、 decorated with,be loaded with,be faced with,be satisfied with等。,The library of our school is _ with computers.Those computers _ us to deal with all kinds of difficulties we meet in our study.For us,computers have become essential learning _.我们学校的图书馆里配备了电脑。这些电脑使我们能够应对学习上的各种难题。对我们而言，电脑已成为必不可少的学习设备。Ke

13、y：equipped;equip;equipment,【词块助记】,4.regret vt.遗憾；悔恨 n.遗憾；悔恨,1.I regretted to tell him that he had been dismissed.To my surprise,he said to me,“I have no regrets.I only regret having taken the wrong job.”我遗憾地告诉他他被解雇了。使我惊奇的是，他对我说：“我没有什么遗憾。我唯一后悔的是选错了工作。”2.Much to my regret,I am unable to accept your in

14、vitation.非常遗憾，我不能接受你的邀请。,regret doing/having done sth.后悔做过某事regret to say/tell/inform 遗憾地去说/告诉/通知做某事regret sth./that 后悔to ones regret 令某人遗憾的是with regret 遗憾地,【构词】regretful adj.后悔的；遗憾的 regretfully adv.懊悔地；遗憾地；抱歉地,1.Jenny didnt regret giving the comment but felt that she could _(express)it differently.

15、2.(2012安徽卷改编)I regret to say that I remembered _(lock)the door before I left the office,_ forgot to turn off the lights.Key：1.have expressed2.to lock;but,【词块助记】,5.focus vi.&vt.(使)聚焦；使集中；调节(的)焦距 n.中心点；集中点,1.(2015福建卷)I wouldnt scold anyone for deciding to party on weekends and in turn I wouldnt expect

16、 anyone to give offence to me for focusing on my health.我不会因为有人在周末决定聚会而责备他，相反，我也不希望有人因为关注我的健康而冒犯我。2.When a photograph isnt in focus,it isnt clear,its out of focus.当照片没对准焦距时就会不清晰，或者说会模糊不清。,focus on/upon 集中于；聚焦于focuson 集中于；聚焦于in focus 焦点对准的；清晰的out of focus 焦点未对准的；模糊不清的,【拓展】表示集中注意力的词组有：focus ones atten

17、tion on，center/concentrate/fix ones attention on，be absorbed/buried/lost in，be devoted to，be occupied with等。,1.The research mainly deals with the difficulty the students have focused their attention on their study all the time.2.(2014福建卷改编)I realized he had been doing what music teachers always stre

18、ss:focus to the music and pretend the others arent there.Key：1.focused 改为focusing2.to 改为on/upon,6.ridof 使摆脱或除去,1.(2015浙江卷)After having taught fifth-grade classes for four years,I decided to try at all costs to rid them of their fear.教了四年的五年级之后，我决定不惜一切代价消除他们的恐惧。2.(2015海南卷)Gradually,this noise began t

19、o appear during a show,and to get rid of it,I had to change to another channel and then change it back.慢慢地，这种声音开始在演出中出现，为了摆脱它，我不得不调到另外一个频道，然后再换回来。3.For students,the school uniform reminds them of their tasks to get an education.校服提醒学生们他们的任务是受教育。4.He cheated the old lady of her money.他骗了老太太的钱。5.You n

20、eed to convince them of your enthusiasm for the job.你要让他们相信你对这份工作的热情。,【头脑风暴】,get rid of 摆脱；除去 cheat sb.of sth.骗取某人某物convince sb.of sth.使某人相信某事cure sb.of sth.治愈某人的某种疾病inform sb.of sth.通知某人某事remind sb.of sth.提醒某人某事rob sb.of sth.抢了某人某物suspect sb.of sth.怀疑某人做了某事warn sb.of sth.警告某人某事,7.would rather 宁愿；宁可

21、,1.Would you rather walk or take a bus?你是愿意步行还是坐公交车？2.Mr.Jones would rather have stayed home last night.琼斯先生宁愿昨晚待在家里。3.I would rather he hadnt told you the news that you failed in the exam.我宁愿他没告诉你你考试失败的这个消息。4.(2014陕西卷)We would rather our daughter stayed at home with us,but it is her choice,and she

22、is not a child any longer.我们宁愿女儿和我们一起住，但是这是她的选择，毕竟她不是孩子了。5.Who would you rather have go with you?你宁愿让谁和你一块去？,【头脑风暴】,【微解析】,8.This special strain of rice makes it possible to produce one-third more of the crop in the same fields.这种特殊的稻种使得同样的田地多收获三分之一的产量成为可能。,这个句子的基本结构是由“make itto do 使做(某事)成为”构成的。句中it是

23、形式宾语,possible是宾语补足语,to do是真正的宾语。有些动词后常跟这种结构,如：find/feel/think/consider/make it adj./n.不定式短语。,【仿写】1.The two girls are so alike that strangers _ one from the other.这两个女孩长得很相像，不熟悉的人发现很难将她俩区分开来。2.(2012四川卷改编)New technologies _ to turn out new products faster and at a lower cost.新兴科技已经使以更快地、更低的成本生产新产品成为了可

24、能。【单句改错】3.As the busiest woman in Norton,she made that her duty to look after all the other peoples affairs in the town.Key：1.find it difficult/hard to tell2.have made it possible3.that改为it,近年来，“绿色食品”在中国变得越来越流行。请你分析这种现象产生的原因，并表达你对该现象的看法。,Key:As more and more people focus on healthy diet Moreover,many vegetables are polluted because of the use of agricultural chemicals,while green food is free of pollution So green food,despite its higher price,still becomes peoples favorite food making many consumers confused Only in this way can green food play a more positive role in peoples life,