m4u2-Chemical-or-organic-farming优秀课件.ppt

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,Unit 2,Working the land,1,1.Have you ever been to the countryside?,2.Do you know how to work on a farm?,Step 1:warming up,Lets go to the farm!,2,3,QQ-farm,peanut,rice,corn,watermelon,apple,farming,soil,food,climate,remove,sow,plough,harvest,store,kill off,select,sell,sunny,cloudy,flood,drought,snowstorm,rich,poor/barren,wet,sorghum,dry,hard,loose,4,First,buy or select the seeds from the store.,5,Second,we need to plough or turn over the soil.,6,Third,we sow the seeds in the soil.,7,Finally,we can harvest our,grain,/,sorghum,/,peanuts,.,8,In order to improve the,output,of the crop,we need to rid the soil of the weed,water the crop,fertilize the soil and kill off the pest.,water the,crop,rid,the soil,of,the weed,fertilize,the,soil,kill off the,pest,to improve the,output,of the,crop,9,fertilizer,How many kinds of fertilizers do farmers use?,There are two kinds.They are chemical fertilizers and natural ones.,chemical,fertilizers,natural,fertilizers,10,Which kind do farmers use when they are doing organic farming?,Do you know about organic farming?,Reading,Chemical or Organic Farming,11,Scanning,1.What is organic farming?,Farming without using chemicals.,2.What is chemical farming?,Farming by using chemicals.,3.What is the goal of using organic farming methods?,To grow good food and,avoid damaging,the environment or peoples health.,12,Long-term use of chemical fertilizers can,cause damage to,the land and peoples,health.,Farmers and customers turn to organic farming.,Other methods to keep the soil fertile.,Skimming,Problems caused by chemical fertilizers,Main idea,P1.,P2.,P3.,P4.,13,Main idea of the passage,_can cause many,problems,so _is,becoming more popular.,Chemical fertilizers,organic farming,14,1.Damage the land by killing the helpful bacteria and pests as well as the harmful ones.,2.Lead to cancer or other illness.,3.Food grown with chemical fertilizers look beautiful,but inside there is usually more water than vitamins and minerals.,The disadvantage of,chemical fertilizers,15,1.Keep the soil rich in minerals and so more fertile.,2.Reduce disease and,help crops grow strong and healthy.,3.Avoid damaging the environment and peoples health.,The advantage of,organic,farming,16,Homework,1.Write a summary of the advantages of organic farming and the disadvantages of chemical farming.,2.Ew 40,期,Part 3,17,Language points,1.These chemicals in the food supply,build up,in peoples bodies over time.,build up,增强,;,建立；开发,Hard working conditions,build up,character.,艰苦的工作条件能磨练人的性格。,He,built up,his strength again after an illness.,他病后逐步恢复体力。,18,2.Many of these chemicals can,lead to,cancer or other illnesses.,lead to:,导致；造成,(,后果）,Too much work and too little rest often lead to illness.,过量的工作和过少的休息会引起疾病。,All roads,lead to,Rome.,条条大道通罗马。,通往,即学即练,用,lead to,的适当形式完成句子。,1.Students should always remember that hard work is the main way which _ success.,2.The bad weather _ a terrible accident a few days ago.,leads to,led to,19,联想,result in,引起,(,某种结果,),、使获得,(,某种成果,),、结果,。如：,The accident,resulted in,two deaths.,result from,由,造成、因,而产生。如：,Sickness sometimes,results from,eating too much.,含介词,to,的东侧短语：,come to,来到，苏醒,refer to,参考，涉及,look forward to,盼望,pay attention to,注意,stick to,坚持,devote to,致力于,turn to,get close to,靠近,20,3.They,focus on,keeping their soil rich and free of disease.,focus on:,集中,(,注意力，精力等）于,Focus on,life.,focus ones attention on,集中注意力于,focus ones mind on,把心思集中到,上,You should,focus your attention on,your work.,你应该把注意力集中在你的工作上。,EW,他需要更集中于他的事业。,He needs to focus more on his career.,瞄准生活。,21,4.reduce,vt.,减少，减缩,They have to reduce expenses this year.,他们今年必须削减开支。,搭配,reduce to,减到，降到,reduce by,减了，降了,Please reduce_ 2%off the invoice price.,The water will freeze when the thermograph reduces _ zero centigrade.,by,to,22,5.This also,keeps,the air,soil,water and crops,free from,chemicals.,这样还可以让空气、土壤、水以及农作物不受化学物质的污染。,keep free from/of,使,免受,(,影响,/,伤害等,),锻炼能使我们摆脱疾病。,Exercise can,keep us free from disease,.,联合国正试图使世界免受战争的威胁。,The United Nation is trying to keep the world free from the threat of war.,23,6.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.,分析,本句结构比较复杂。其主干结构为,:,主句,(Crops put important minerals back into the soil)+,状语,(making it ready for crops),。,状语中又包含“,make+it+,形容词”结构和由,that,引导的定语从句,(that need rich and fertile soil),。,24,7.Some organic farmers prefer planting grass between crops to prevent wind or water from carrying away the soil,and then leaving it in the ground to become a natural fertilizer for the next years crop.,分析,本句的主干结构是一个简单句,其结构是,:,主语,(farmers)+,谓语,(prefer)+,并列宾语,(planting.+leaving.),。,其中,between crops,和,in the ground,作地点状语。,两个宾语后面又分别带有一个不定式作目的状语（,to prevent wind or water from carrying away the soil,和,to become a natural fertilizer for the next years crop,）。,25,Writing,假如你是一位农民，你会选择哪种耕种，为什么？,请根据这节课所学到的知识，围绕这一话题写一小短文。,If I was a farmer,I would prefer to use,26,