人教高一英語必修四UnitUsinglanguage學(xué)習(xí)教案

1、會計學(xué)1人教高一英語必修四人教高一英語必修四UnitUsinglanguage第一頁，編輯于星期一：十三點 三十分。Words previewchemicalproductionbacteriapestnutritionmineraldiscoveryadj. 化學(xué)的化學(xué)的; 關(guān)于化學(xué)的關(guān)于化學(xué)的n. 生產(chǎn)生產(chǎn); 制造制造n. 細(xì)菌細(xì)菌n. 害蟲害蟲; 害獸害獸; 害鳥害鳥n. 營養(yǎng)營養(yǎng); 滋養(yǎng)滋養(yǎng); 食物食物n. 礦物礦物; 礦石礦石n. 發(fā)現(xiàn)發(fā)現(xiàn); 發(fā)覺發(fā)覺第1頁/共62頁第二頁，編輯于星期一：十三點 三十分。focussoilreducerootskim underlinesummary

2、commentn. 焦點焦點; 中心點中心點vt. 集中集中; 聚焦聚焦n. 土壤土壤vt. 減少減少; 減縮減縮n. 根根; 根源根源vt. 瀏覽瀏覽; 略讀略讀vt. 畫底線標(biāo)出畫底線標(biāo)出; 強調(diào)強調(diào)n. 總結(jié)總結(jié); 摘要摘要; 概要概要n. 評論評論; 議論議論vi.& vt. 表達意見表達意見; 做出評論做出評論第2頁/共62頁第三頁，編輯于星期一：十三點 三十分。 Expressions preview build up lead to focus on keep free from/of逐漸增強逐漸增強; 建立建立; 開發(fā)開發(fā)導(dǎo)致導(dǎo)致; 造成造成 (后果后果) 集中集中 (

3、注意力注意力, 精力等精力等) 于于使使免受免受(影響影響, 傷害等傷害等)；使使不含不含(有害物有害物)第3頁/共62頁第四頁，編輯于星期一：十三點 三十分。It is fertilizer. What is the substance we put on the soil to make crops grow?第4頁/共62頁第五頁，編輯于星期一：十三點 三十分。How many kinds of fertilizers do farmers use?There are two kinds. They are chemical fertilizers and natural ones. 第

4、5頁/共62頁第六頁，編輯于星期一：十三點 三十分。Organic Farming第6頁/共62頁第七頁，編輯于星期一：十三點 三十分。chemical fertilizer cow dung用化學(xué)肥料和有機肥料的區(qū)別用化學(xué)肥料和有機肥料的區(qū)別:第7頁/共62頁第八頁，編輯于星期一：十三點 三十分。ReadingCHEMICAL OR ORGANIC FARMING?第8頁/共62頁第九頁，編輯于星期一：十三點 三十分。Chemical fertilizers can cause many problems, so organic farming is becoming more popula

5、r. Organic farming means growing crops with natural fertilizer. The organic farmers keep the soil rich and healthy. The main idea of the text:第9頁/共62頁第十頁，編輯于星期一：十三點 三十分。Long-term use of chemical fertilizers can cause damage to the land and peoples health.Problems caused by chemical fertilizers.The m

6、ainidea of each paragraphP1.P2.Farmers and customers turn to organic farming.Other methods to keep the soil fertile. P3.P4.第10頁/共62頁第十一頁，編輯于星期一：十三點 三十分。Chemical fertilizer Not good for the soil or the water supplyThe soil gets exhausted.Kill both helpful and harmful bacteria and pests第11頁/共62頁第十二頁，編

7、輯于星期一：十三點 三十分。Chemicalfarming advantages problems cause stop crop diseaseincreaseproductiondamage thelandbykillingaffectcropsby stayinglead to cancer/illnessesbybuildinguphave lessnutritionby growingtoo fast第12頁/共62頁第十三頁，編輯于星期一：十三點 三十分。Organic farming Natural waste from animalsMake the soil richer i

8、n minerals and more fertileA healthy soilReduce diseases in cropsHelp crops grow strong and healthy第13頁/共62頁第十四頁，編輯于星期一：十三點 三十分。Organicfarming methods advantagesuse natural wastemakethe soil richin mineralschangethecropput minerals back into soil, makingplant crops with different rootsuse different

9、levels of land plant grass between cropspreventfrom,a natural fertilizer第14頁/共62頁第十五頁，編輯于星期一：十三點 三十分。Other methods: Change crops every two or three yearsCorn, wheatPeas, soybeansPut the minerals back into the soil, making it rich and healthyCrops that use the surface of the soil (peanuts)Crops that

10、need a deeper level of soil (root vegetable)Make sure that what is left in the ground after harvesting becomes a natural fertilizer for the next years crop第15頁/共62頁第十六頁，編輯于星期一：十三點 三十分。1. Which statement is WRONG according to the text? A. All crops are organic. B. Recently, the term “organic farming”

11、 has gained another meaning. C. All farmers use fertilizers. D. Scientists believe some chemical fertilizers are better for people.Choose the best answer. D第16頁/共62頁第十七頁，編輯于星期一：十三點 三十分。2. Which is not the reason why organic farmers prefer natural waste from animals? A. It can keep the food free from

12、 chemicals. B. It can keep the air, soil and water free from chemicals. C. It can kill harmful pests. D. It can make the soil richer in mineral.C第17頁/共62頁第十八頁，編輯于星期一：十三點 三十分。3. What is the advantage of using chemical fertilizers? A. Leaving chemicals in the ground for a long time is good for water s

13、upply. B. They can get the soil exhausted. C. They can kill helpful bacteria. D. They can kill harmful pest. D 第18頁/共62頁第十九頁，編輯于星期一：十三點 三十分。4. The organic farmers do the followings except _.A. adding fertilizers which is rich in mineralB. changing crops every two or three yearsC. planting seeds in d

14、ifferent layers of the soilD. planting grass between crops to prevent the soil from being blown awayA 第19頁/共62頁第二十頁，編輯于星期一：十三點 三十分。1. What is “organic farming”? Answer the questions.It refers to crops growing with natural rather than chemical fertilizers.2. What do organic farmers prefer to use as f

15、ertilizer? The fertilizer that organic farmers prefer is natural waste from animals.第20頁/共62頁第二十一頁，編輯于星期一：十三點 三十分。Farmers grow peas or soybeans after corn or wheat so that peas and beans can put minerals back into the soil, making it rich and healthy and ready to grow more wheat or corn.第21頁/共62頁第二十

16、二頁，編輯于星期一：十三點 三十分。Make the soil richer in minerals and so more fertile. Reduce diseases in crops and help them grow strong and healthy. Besides, keep the air, soil and water as well as the food supply free from chemical.第22頁/共62頁第二十三頁，編輯于星期一：十三點 三十分。They are a great way to stop crop disease and incr

17、ease production.5. Why are chemical fertilizers so popular in farming today?第23頁/共62頁第二十四頁，編輯于星期一：十三點 三十分。6. What problems are caused by using chemical fertilizers?There are three problems. First, chemical fertilizers affect the soil and the water supply badly. Second, they allow farmers to grow the

18、 same crop year after year and exhaust the soil.Third, they kill both helpful and harmful pests. 第24頁/共62頁第二十五頁，編輯于星期一：十三點 三十分。7. What is the main reason for using organic farming methods?The main reason for using organic farming methods is to grow good food and to avoid damaging the environment or

19、peoples health. 第25頁/共62頁第二十六頁，編輯于星期一：十三點 三十分。Methods of organic farmingAdvantages of methodsFarmers use natural waste from animals.This makes the soil richer in minerals and so more fertile.Fill in the chart.Farmers often change the kind of crop in each field every few years.Changing the crops rene

20、ws the minerals in the soil and helps it become rich and healthy.第26頁/共62頁第二十七頁，編輯于星期一：十三點 三十分。Methods of organic farmingAdvantages of methodsFarmers plant crops with different lengths of roots.Farmers sometimes plant grass between crops and leave it in the ground.This uses different levels of soil.

21、This prevents wind or water from carrying away soil and acts as a natural fertilizer.第27頁/共62頁第二十八頁，編輯于星期一：十三點 三十分。 It is important to explain this again or we will confuse the students. confuse 動詞動詞, 表示表示“把把(某人某人)弄糊涂弄糊涂; 使迷惑使迷惑”, “搞亂搞亂; 混淆混淆”。如如: They asked me so many questions thatthey confused me

22、. 他們問我那么多問題把我都弄糊涂了。他們問我那么多問題把我都弄糊涂了。第28頁/共62頁第二十九頁，編輯于星期一：十三點 三十分。My Chinese and English books are confused together. 我的中英文的書籍混在一起了。我的中英文的書籍混在一起了。He was confused by a strange idea. 他被奇怪的念頭弄糊涂了。他被奇怪的念頭弄糊涂了。Please dont confuse Australia with Austria. 別把澳大利亞和奧地利混淆了。別把澳大利亞和奧地利混淆了。第29頁/共62頁第三十頁，編輯于星期一：十三

23、點 三十分?！就卣埂俊就卣埂縞onfusion n. 混亂混亂; 慌亂慌亂; 混淆混淆confusing和和confused辨析辨析:這兩個詞都是由這兩個詞都是由confuse轉(zhuǎn)化而來的形容詞。轉(zhuǎn)化而來的形容詞。confusing意思是意思是“莫名其妙的莫名其妙的; 難以理解的難以理解的(difficult to understand; puzzling)”, 強調(diào)事物本身所具有的性質(zhì)強調(diào)事物本身所具有的性質(zhì); confused意思是意思是“糊涂的糊涂的; 迷亂的迷亂的(unable to think clearly)”, 強調(diào)人對某事物的感受。強調(diào)人對某事物的感受。第30頁/共62頁第三十一

24、頁，編輯于星期一：十三點 三十分。2. His father says that he has never regretted sending his son to study abroad. (Page 13)regret在句中作動詞在句中作動詞, 意為意為“為為感到遺憾感到遺憾; 后悔后悔; 惋惜惋惜”。如：如：I didnt regret the choice I had made. 我做了這個選擇并不后悔。我做了這個選擇并不后悔。 I regret to say that we cant stay here any longer. 我很遺憾我很遺憾, 我們不能再在這兒多呆了。我們不能再

25、在這兒多呆了。 She regretted having missed the film. 她懊悔沒能看上那場電影。她懊悔沒能看上那場電影。 第31頁/共62頁第三十二頁，編輯于星期一：十三點 三十分?！就卣埂俊就卣埂?) regret還可用作名詞還可用作名詞, 意為意為“遺憾遺憾; 后悔后悔”。 I felt a great regret at having spent my time in this way. 我對這樣浪費光陰深感懊悔。我對這樣浪費光陰深感懊悔。 2) regret to do sth 表示表示“遺憾地要遺憾地要”，后面的動詞常是后面的動詞常是say, tell, spea

26、k, inform等等; regret doing sth 表示表示“后悔做過后悔做過”; to ones regret 令人遺憾的是令人遺憾的是第32頁/共62頁第三十三頁，編輯于星期一：十三點 三十分。第33頁/共62頁第三十四頁，編輯于星期一：十三點 三十分。第34頁/共62頁第三十五頁，編輯于星期一：十三點 三十分。5. They focus on keeping their soil rich and free of disease.focus on: 集中集中(注意力注意力, 精力等精力等)于于You should focus your attention onyour work.

27、把注意力集中在你的工作上。把注意力集中在你的工作上。 Olympus: Focus on life.奧林巴斯奧林巴斯: 瞄準(zhǔn)生活。瞄準(zhǔn)生活。第35頁/共62頁第三十六頁，編輯于星期一：十三點 三十分。6. reduce v. 減少減少, 降低降低e.g. 公司盡力通過減少花銷來提高利潤。公司盡力通過減少花銷來提高利潤。The company tries to increase profits by_ .今年我們已經(jīng)減少了業(yè)務(wù)開支。今年我們已經(jīng)減少了業(yè)務(wù)開支。We _ expenses this year. reducing costshave reduced第36頁/共62頁第三十七頁，編輯于

28、星期一：十三點 三十分。第37頁/共62頁第三十八頁，編輯于星期一：十三點 三十分。拓展拓展1)keep from: 隱瞞隱瞞, 不把不把告訴告訴(某人某人)阻止阻止, 避免避免” 如：如：He wont be able to keep the truth from his father.You cant keep him from doing that thing.2)free from: 使解除使解除, 使擺脫使擺脫 如：如：They aim to free the students from too much homework.3)be free of sb/sth: 擺脫某人擺脫某人/

29、某物某物Im free of that job at last.第38頁/共62頁第三十九頁，編輯于星期一：十三點 三十分。Expressions 1. 化肥化肥2. 對對造成損害造成損害3. 洗掉某物洗掉某物4. 導(dǎo)致導(dǎo)致; 造成造成(后果后果); 通往通往5. 逐漸增強逐漸增強, 建立建立6. 另外另外(還有還有)7. 使使免受免受(影響影響);8. 集中集中(注意力、精力注意力、精力)于于9. 每隔幾年每隔幾年10. 避免做避免做chemical fertilizerscause/do damage towash offlead tobulid upin addition (to)kee

30、pfree from/offocus onevery few yearsavoid doing第39頁/共62頁第四十頁，編輯于星期一：十三點 三十分。Exercises cause/do damage to, wash off, lead to, bulid up, in addition(to), keepfree from/of, focus on,avoid doing1. His mistakes _ his failure.2. These chemicals in the food supply_ in peoples bodies over time.3. All roads

31、_ Rome.4.Please _ your mind _ the following problem.5. Children should _ violence.ledtobulidupfocusonleadtobe kept free from第40頁/共62頁第四十一頁，編輯于星期一：十三點 三十分。6. He likes basketball. _, he likes football. He likes basketball _ football.7. Little Tom stuck to _ the mud _ his shoes by himself before he cam

32、e in. 8. I tried to _ (meet) him because he always bores me.9. The storm on May 3 _ great _ people in Burma so far.cause/do damage to, wash off, lead to, bulid up, in addition(to), keepfree from/of, focus on,avoid doingIn additionin addition towashingoffavoid meetinghascauseddamageto第41頁/共62頁第四十二頁，編

33、輯于星期一：十三點 三十分。1 As you listen to this dialogue, keep in mind what you have just read about chemical fertilizers. What is the main topic of the conversation?Listening 第42頁/共62頁第四十三頁，編輯于星期一：十三點 三十分。1. Paul thinks that Carrie is not telling him the truth.2. Using chemical fertilizers always makes veget

34、ables empty inside.TrueFalse2 Listen to the dialogue a second time. Decide if the following statements are true or false, according to theconversation. Give your reasons.第43頁/共62頁第四十四頁，編輯于星期一：十三點 三十分。3. Todays fruit is not as healthy for people as fruit fifty years ago.4. Eating more vegetables migh

35、t not always be good for us.5. All of todays vegetables look healthy but in fact are not.FalseTrueTrue第44頁/共62頁第四十五頁，編輯于星期一：十三點 三十分。WHATS WRONG WITH THEVEGETABLES?Girl: Hey, Paul, listen to this a magazine article about a farmer who used too much chemical fertilizer on his fields. When his vegetable

36、s were picked, they were all found to be empty!Listening text第45頁/共62頁第四十六頁，編輯于星期一：十三點 三十分。BOY: Empty? Youre joking, Carrie that cant be true!Girl: I didnt believe it either! This article says this can happen sometimes with vegetables like cucumbers, carrots and pumpkins. This chemical fertilizer ma

37、kes the vegetables grow fast to look big and beautiful, but theyre empty inside! 第46頁/共62頁第四十七頁，編輯于星期一：十三點 三十分。 BOY: You know, Ive noticed that sometimes my mum buys carrots from the supermarket that have big holes down the center. I guess that must be from using chemical fertilizers! GIRL: Yeah, th

38、ats what the magazine says! The main point of the article, though, isnt about holes in our vegetables. 第47頁/共62頁第四十八頁，編輯于星期一：十三點 三十分。 Its talking about why the fruit and vegetables we eat today arent as nutritious as the ones our grandparents ate.BOY: What? My mum is always telling me to eat more ve

39、getables, because theyre good for me!GIRL: Yeah, I know my mother says that same thing! And its true -第48頁/共62頁第四十九頁，編輯于星期一：十三點 三十分。they are good for us but the problem is that they arent healthy enough! All these chemical fertilizers they kill off both the bad and the good things in the ground. The

40、 ground doesnt have enough vitamins and minerals any more to help crops grow healthy.第49頁/共62頁第五十頁，編輯于星期一：十三點 三十分。第50頁/共62頁第五十一頁，編輯于星期一：十三點 三十分。F= Farmer C= CustomerF: Good morning! Would you like some organic carrots this morning?C: Hmm Theyre a little expensive! What is the advantage of ?Reading, Speaking and writingSample dialogue第51頁/共62頁第五十二頁，編輯于星期一：十三點 三十分。F: The advantage of these vegetables is that they are green food so they are safe to eat and good for your family. C: But what is the advantage of having green food? I know all vegetables are good for