【课件】Unit 5 Using language Reading for writing 课件-2022-2023学年高中英语人教版（2019）选择性必修第一册.pptx

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1、Using languageReadingLead-inDo you want to have a land of your own?What will you grow if you have a land?chemical fertilizersnatural fertilizersChemical farming farming using chemical pesticides and artificial fertilisers.Organic farming simply farming without using any chemicals.Chemical Versus Org

2、anic FarmingA What organic farming is B Why man-made chamical are still used in farming C Organic methods for producing rich soilD The problems with chemical farminngPara1-2:()Para3:()Para5:()Para4:()Read for stuctureDACBD The problems with chemical farminng Para1-2A What organic farming is Para3C O

3、rganic methods for producing rich soil Para4B Why man-made chamical are still used in farming Para5Chemical farmingOrganicfarmingThinkingChemical farmingPara1-2CHEMICAL VERSUS ORGANIC FARMINGChemical pesticides and artificial fertilisers have been in widespread use in farming since the middle of the

4、 20th century.When they were first introduced,many farmers welcomed them as a great way to fight crop disease and increase production.Over time,however,what some scientists have found is that their long-term use can sometimes harm both the land and peoples health.此句中包含两个从句，分别是此句中包含两个从句，分别是what引导的引导的

5、_从句，从句，what在在此从句中充当此从句中充当_语；语；以及以及that引导的引导的_从句，从句，that在此在此从句中从句中_成分；成分；_实际意义，但实际意义，但_省略省略Chemical pesticides and artificial fertilisers_(be)in widespread use in farming since the middle of the 20th century.When they were first introduced,many farmers welcomed them_ a great way to fight crop disease

6、 and increase production.Over time,_,what some scientists have found is _ their long-term use can sometimes harm both the land _ peoples health.have beenashoweverthatandFor example,pesticides can damage the land by killing not only harmful bacteria and insects,but also helpful ones.In addition,these

7、 chemicals can stay in the soil and underground water sources for a long time.This affects the crops grown on the land and,in turn,the animals and humans who digest them.Many people worry that these chemicals may make them ill and even cause cancer.In fact,some pesticides like DDT have been prohibit

8、ed in most countries because of the damage they cause to people and the environment.As for chemical fertilisers,crops grown with them usually grow too fast to be rich in nutrition.They may look beautiful on the outside,but inside there is usually more water than essential minerals,and they often hav

9、e less flavour as well.此句中此句中grown on the land 是过去分词短语做是过去分词短语做_语；修饰语；修饰_;此句中的此句中的who digest them是是_从句，其先行词是从句，其先行词是_essential:essence本质；实质；本质；实质；in essence从本质上讲从本质上讲be essential to 对对.很重要很重要It is essential(for sb)to do sth(对某人来说对某人来说)做某事很重要做某事很重要It is essential that.(should)do 做做.很必要很必要1.Water and

10、food are essential_living things(生物生物)2.It is good for you to learn to read body language,which is essential to_(develop)your social skills3.As we all know,it is essential for students _(make)careful preparations for the exam.4.每个学生都必须有充足的睡眠和规律的锻炼每个学生都必须有充足的睡眠和规律的锻炼For example,pesticides can damage

11、the land by _(kill)not only harmful bacteria and insects,_also helpful ones.In addition,these chemicals can stay in the soil and underground water sources for a long time.This affects the crops grown on the land and,in turn,the animals and humans _ digest them.Many people worry that these chemicals

12、may make them ill and even cause cancer.In fact,some pesticides _DDT have been prohibited in most countries because of the damage they cause_people and the environment.As for chemical fertilisers,crops grown with them usually grow too fast _(be)rich in nutrition.They may look beautiful on the outsid

13、e,but inside there is usually more water than essential minerals,and they often have _(little)flavour as well.killingbutwholiketoto beless1.Why did many farmers welcome the introduction of chemical farming?(Para1)Advantages:Many farmers welcomed them as a great way to fight crop disease and increase

14、 production.2.What concerns many people about the use of pesticides?(Para1)Disadvantages:Their long-term use can sometimes harm both the land and peoples health.3.What is one problem with the use of chemical fertilisers?(Para2)Disadvantages:Crops grown with them usually grow too fast to be rich in n

15、utrition.Organic farmingPara3-4As an alternative,some farmers have switched to organic farming,and many customers have turned to organic food when they shop at the local grocery.Organic farming is simply farming without using any chemicals.Organic farmers focus on keeping their soil rich and free of

16、 disease through natural means.For example,many organic farmers use natural waste from animals as fertiliser.This makes the soil in their fields richer in minerals.It also keeps the air,soil,water,and crops free of chemicals.an alternative to.的替代品的替代品have no alternative to do sth别无选择只能做某事别无选择只能做某事al

17、ternative energy 替代能源替代能源alternative lifestyle/values非传统的生活方式非传统的生活方式/价值观价值观“不得不做某事不得不做某事”的的其他表达：其他表达：cant but do sth;cant choose/help but doby all means 当然行；可以当然行；可以by no means绝不绝不by means of借助借助.的手段；依靠的手段；依靠.的方法的方法As_ alternative,some farmers have switched to organic farming,and many customers hav

18、e turned to organic food_ they shop at the local grocery.Organic farming is simply farming_ using any chemicals.Organic farmers focus on keeping their soil rich and free _disease through natural means.For example,many organic farmers use natural waste from animals _fertiliser.This makes the soil in

19、their fields richer in minerals.It also keeps the air,soil,water,_ crops free of chemicals.anwhenofaswithoutandOrganic farmers also use many other methods to produce rich soil.They often change the kind of crop grown in each field every year.For instance,they may grow corn or wheat in a field one ye

20、ar,and then grow beans there the next.Why different crops are grown is because they put important minerals back into the ground,making it ready for the next batch of crops.Organic farmers also plant diverse crops that use different depths of soil to help keep it rich.For example peanuts grow on the

21、grounds surface,but many other vegetables put down deep roots.The goal of using different organic farming methods is to grow good food while avoiding damage to the environment or to peoples health.adj.highwidelongstrongbroadn.v.heightheightenwidthwidenlengthlengthenstrengthstrengthenbroadenroot.根；根茎

22、根；根茎;根源根源1.We need to get to the root of the problem before we can solve it.2.Since that day,a dream has taken root in my heart.3.No country,no happiness.Everyone must be rooted in the soil of the motherland.问题的根源问题的根源在心里扎根在心里扎根植根于植根于Why different crops are grown is because they put important minera

23、ls back into the ground,making it ready for the next batch of crops.此句是由此句是由why引导的引导的_从句，从句，why在此从句中在此从句中_成分，成分，_意义，意为意义，意为_;because 引导引导_从句，从句，because在此从句中在此从句中_意义，意为意义，意为_.making.crops做做_状语状语The goal of using different organic farming methods is to grow good food while avoiding damage to the envir

24、onment or to peoples health.此句是的主语是此句是的主语是_Organic farmers also use many other _(method)to produce rich soil.They often change the kind of crop grown in each field every year._instance,they may grow corn _wheat in a field one year,and then grow beans there the next.Why different crops are grown _(be

25、)because they put important minerals back into the ground,_(make)it ready for the next batch of crops.Organic farmers also plant diverse crops that use different _(depth)of soil to help keep it rich.For example peanuts grow _ the grounds surface,but many other vegetables put down deep_(root).The goa

26、l of using different organic farming methods _(be)to grow good food while avoiding damage to the environment or _ peoples health.methodsFororismakingdepthsonrootsisto4.How is organic farming different from chemical farming?(Para3)Organic farming is simply farming without using any chemicals.Organic

27、farmers focus on keeping their soil rich and free of disease through natural means.5.What are the organic methods mentioned in the text?(Para3&4)1.use natural waste from animals as fertilizer.2.change the kind of crop grown in each field every year.3.plant diverse crops that use different depth of s

28、oil to keep it rich.6.Whats the goal of using organic farming methods?（Para4）Advantages:The goal of using different organic farming methods is to grow good food while avoiding damage to the environment or to peoples health.Some people would prefer to stop the use of man-made chemicals in agriculture

29、 entirely.What keeps them from doing so is the fact that chemical farming serves the high demand for food around the world.Organic farming is nowhere near able to meet that need.Therefore,there is still a long way to find a suitable solution that puts sufficient food on the dinner table while keepin

30、g people and the environment as healthy as possible.prefer to do rather than do prefer doing to doingprefer_(n)nowhere near完全没有；远不及完全没有；远不及Eg.We only had$100 and that was nowhere near enough to buy a new computer.1.You can get nowhere without an objective in life.2.I was crossing the street when a c

31、ar appeared out of nowhere.没有结果；没有进展没有结果；没有进展突然出现突然出现What keeps them from doing so is the fact that chemical farming serves the high demand for food around the world.本句包含本句包含what引导的引导的_从句，从句，what在此句中在此句中_语；以及语；以及that引导的引导的_从句，从句，that在此句中在此句中_成分，但成分，但_省略省略.可以跟同位语从句的名有可以跟同位语从句的名有news,idea,fact,promise

32、,question,doubt,hope,message,suggest,word(消息消息),possibility.同位语从句的连接词有，同位语从句的连接词有，从属连词从属连词：that;whether;连接代词连接代词：who;whom;whose,what,which;连接副词连接副词：when;where;why;how等等1.I heard the news _our class had won the first place2.She hasnt made the decision _she should give up or not3.I have no idea_wine i

33、s best-it is a matter of personal taste4.We havent yet settled the problem _we are going to spend our summer vacationSome people would prefer _(stop)the use of man-made chemicals in agriculture _(entire)._ keeps them from doing so is the fact _ chemical farming serves the high demand for food around the world.Organic farming is nowhere near able _(meet)that need.Therefore,there is still a long way to find a suitable _(solve)that puts sufficient food on the dinner table while _(keep)people and the environment as healthy _possible.to stopentirelyWhatthatto meetsolutionkeepingasThank you