人教新课标高中英语必修四《Unit 2 Period Three》课件
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1、Unit 2 Working the land,内容索引,Period Three Learning about Language & Using Language,课文预读,互动探究,达标检测,基础自测,课文预读,.Match the main idea of each paragraph. Para.1 A.Problems caused by chemical fertilizers. Para.2 B.Farmers and customers turn to organic farming. Para.3 C.Long-term use of chemical fertilizers
2、 can cause damage to the land and peoples health. Para.4 D.Other methods to keep the soil fertile.,.Read the passage and judge whether the following sentences are true (T) or false (F). 1.Organic farmers prefer using natural waste from animals and chemical fertilizers.( ) 2.Using natural waste makes
3、 the soil richer in minerals and so more fertile.( ) 3.Using organic farming methods is to grow good food and to avoid damaging the environment or peoples health.( ),F,T,T,4.Using chemical fertilizers has become very common in farming over the past half century.( ) 5.Chemical fertilizers only kill h
4、armful bacteria and pests.( ),T,F,.Read the passage carefully and choose the best answer. 1.The writer seems to agree that . A.natural fertilizers are better than chemical fertilizers B.chemical fertilizers are better than natural fertilizers C.farmers prefer chemical fertilizers because they can im
5、prove the soil D.organic farmers change crops every two or three years because they want to produce more kinds of crops,答案,1,2,3,4,2.How many ways do the organic farmers use to keep their soil fertile? A.3. B.4. C.5. D.6.,答案,1,2,3,4,3.Which of the following is TRUE? A.All farming is organic farming.
6、 B.Using natural waste from animals can help reduce disease in crops and help them grow strong and healthy. C.Farmers often grow the same crops year after year.In this way,they can have a good harvest. D.Some organic farmers prefer planting grass between crops to make full use of the field.,答案,1,2,3
7、,4,4. so that the soil may not get exhausted. A.Farmers grow the same crops year after year B.Farmers use natural fertilizers C.Farmers change crops every two or three years D.Farmers use chemical fertilizers,1,2,3,4,答案,基础自测,1. vt.遗憾;惋惜n.遗憾;懊悔 2. n.细菌 3. n.营养;滋养;食物 4. n.焦点;中心点vt.集中;聚焦 5. n.土壤,一、词汇过关
8、,基础词汇,regret,bacteria,nutrition,focus,soil,6. vt.减少;减缩 7. n.根;根源 8. vt.浏览;略读 9. vt.画底线标出;强调 10. n.评论;议论vi.& vt.表达意见;作出评论,reduce,root,skim,underline,comment,1. vt.使迷惑;使为难 adj.令人迷惑的 adj.感到迷惑的confusion n.迷惑 2. adj.化学的;关于化学的chemistry n.化学 3. n.矿物;矿石mine n.矿;矿山 4. n.生产;制造produce vt.生产;制造producer n.生产者;制片
9、人 5. n.发现;发觉discover vt.发现discoverer n.发现者 6. n.总结;摘要;概要summarize vt.总结;概括,拓展词汇,confuse,confusing,confused,chemical,mineral,production,discovery,summary,1.构词法 规则discover (v.发现) discovery (n.发现) 联想(1)recovery康复;恢复 (2)delivery递送 (3)treaty条约 (4)robbery抢劫;盗窃 2.focus on集中(注意力)于 联想(1)concentrate on专心于 (2)
10、be absorbed in全神贯注于 (3)be buried in致力于;全神贯注于 (4)be lost in沉溺于 (5)be centered on全神贯注于,联想归纳,1. 逐渐增强;建立;开发 2. 导致;造成(后果) 3. 集中(注意力、精力)于 4. 使免受(影响、伤害等);使不含(有害物),二、短语互译,汉译英,build up,lead to,focus on,keep.free from/of,英译汉,1.cause damage to _ 2.wash off _ 3.in addition _ 4.turn to _ 5.every few years _ 6.av
11、oid doing sth. _,给造成损害,将洗掉,另外,转向;向求助,每(隔)几年,避免做某事,教材原句 1.Recently,however,scientists have been finding that long-term use 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。 分析解读 have been finding为现在完成进行时。,三、重点句式
12、,仿写运用 I letters all this morning. 一整个上午我都在写信。,have been writing,教材原句 2.In addition,fruit,vegetables and other food grown with chemical fertilizers usually grow too fast to be full of much nutrition. 另外,施过化肥的水果、蔬菜和其他食物通常生长得过快而营养不足。 分析解读 too.to.太而不能。 仿写运用 He is nervous before every exam. 每次考前他都紧张得吃不下东
13、西。,too,to eat anything,教材原句 3.Crops 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,从而使之适宜于种植要求土壤肥沃的农作物,比如小麦或玉米。 分析解读 句中making.为现在分词短语作结果状语。,仿写运用 The storm left, . 暴风雨结束了,给这个地区
14、造成了巨大损害。,causing great damage to this area,互动探究,It is important to explain this again or we will confuse the students. 再次对此作出解释是很重要的,否则我们会让学生感到迷惑。,(1)confuse vt.使迷惑;使为难 confuse A with B 把A与B混淆 (2)confused adj.(感到)困惑的 be/get confused about/with.对感到困惑 (3)confusing adj.令人困惑的,重点词汇,(1)The old man is alwa
15、ys confusing the boy with his twin brother. 这个老人总是把这个男孩和他的双胞胎弟弟弄混。 (2)I read the poem again and was confused. 我又把诗读了一遍,感到很困惑。 (3)What you said at the meeting was really (confuse). 你在会上说的话确实让人迷惑。,confusing,单句改错 (4)From her confusing look,I could tell that she couldnt understand the sentence.,confused
16、,regret vt.遗憾;惋惜n.遗憾;懊悔,regret doing/having done sth. 后悔做了某事 regret to do sth. 遗憾将要做某事(不定式中的动词常为tell,say,inform等) to ones regret令某人感到遗憾的是 with regret遗憾地,(1)We regret that we are unable to reconsider your case. 无法重新考虑你的情况,我们很遗憾。 (2)In fact,John regretted last weeks lecture. 事实上,约翰后悔没参加上周的讲座。 (3)I reg
17、retted (tell) you that you hadnt passed the driving test. 我很遗憾地告诉你你没有通过驾驶考试。,not attending/not having attended,to tell,(4) ,I am unable to accept your kind invitation. 我不能接受你的盛情邀请,深感抱歉。 (5)He told me regret that he could not come to the party. 他遗憾地告诉我,他不能来参加派对了。,Much to my regret,with,Many of these
18、chemicals can lead to cancer or other illnesses. 很多化学成分能导致癌症或其他疾病。,(1)lead to引起,导致 lead sb. to sp.把某人带到某地 lead sb. to do sth. 使某人去做某事 lead to sb. /sb. s doing sth. 导致某人做某事 lead a(n) .life过着的生活,(2)lead to中的to是介词,后接名词或动名词;to为介词的短语还有: get/be used to习惯于 be devoted to/devote.to.致力于;忠诚于 admit to承认 get dow
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