高中英语必修4ppt课件-Unit2-language-points

,策划：学生双语报,*,策划：学生双语报,*,策划：学生双语报,*,策划：学生双语报,*,策划：学生双语报,*,策划：学生双语报,*,策划：学生双语报,*,策划：学生双语报,*,策划：学生双语报,*,策划：学生双语报,*,策划：学生双语报,*,Unit 2 Working the land,Language points,Unit 2 Working the landLanguag,If,so,=If you have ever grown some plants.,so,表示“,象那样的，如前所说的,”，用于代替已陈述的事。如：,-can you pass the exam?,-I hope so.,If so=If you have ever grown s,struggle for,struggle against,struggle with,e.g.They struggled for peace.,The old man has been struggling,with/against illness,.,为争取,而斗争奋斗,与,做斗争,为反对,而斗争,与,做争斗,和谁一起战斗,L4,struggle fore.g.They str,3.Dr Yuan grows,what,is called super hybrid rice.,袁博士种植了被人称作超级杂交水稻的稻谷。,e.g.I dont quite understand,what,you are explaining.Please watch what I am doing carefully.,L4,3.Dr Yuan grows what is called,_the emperor saw was quite different from_ the old minister told him.,A.What,that B.That,what,C.Which,that D.What,what,_the emperor saw was qu,2.It is pretty well understood _controls the flow of carbon dioxide in and out the atmosphere today.,A.that B.when,C.what D.how,2.It is pretty well understoo,4.,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。,make it possible(for sb.)to do sth:,使某人有可能做某事,e.g.,Her beauty makes it possible for her to win his love.,L6,4.This special strain of rice,it,在句中作形式宾语，真正的宾语为,to produce,结构为：,动词（,make,feel,think,regard,）,+it+adj+to do.,e.g.,We,think it important to learn,English well.,it 在句中作形式宾语，真正的宾语为to produce,5.Born in a poor farmers family in 1931,Dr.Yuan,graduate from,Southwest Agriculture College in 1953.,袁博士,1931,年出身于一个贫苦农民的家庭，,1953,年毕业于西南农学院。,graduate,n.a person who has completed a university degree course.,毕业生,undergraduate,本科毕业生,post-graduate,硕士毕业生，研究生,L10,5.Born in a poor farmers fami,graduate from:,毕业于,graduation,n.,毕业,e.g.After,his graduation from college,he went to work in a company.,=After,he graduated from college,he went to work in a company.,graduate from:毕业于graduation,Supplement:,bachelors degree,学士学位,masters degree,硕士学位,doctors degree,博士学位,Supplement:,6.Since then,he has,devoted,his life,to,finding ways to grow more and more rice.,从那以后，他就把毕生精力投入到水稻高产的研究中。,devote oneself to+n/doing,献身于，致力于,注意：,to,为介词，后面接,v-ing.,类似的短语还有,look forward to,pay attention to,be used to,belong to,等等,.,6.Since then,he has devoted h,7.Dr Yuan,searched for,a way to increase rice harvest without expanding the area of fields.,袁博士寻求一种在不扩大种植面积的情况下提高水稻产量的方法。,search for,：搜寻，寻找,look for/hunt for/be in search of,L16,7.Dr Yuan searched for a w,They searched the man all over for money.,I searched all the drawers for the missing papers.,他们搜遍了那个人的全身找钱,.,我翻遍了所有的抽屉，找那些丢失的文件,.,search sb.for sth.,搜某人身以找某物,search some place for sb./sth.,搜查某地找某人,/,某物,search sb,搜身；,search some place,搜查某地,They searched the man all over,e.g.The police,searched,the woods for the lost child.,警察在树林里寻找失踪的小孩。,Scientists are still,searching for,a cure to the common cold.,科学家们仍然在寻找普通感冒的治疗方法。,e.g.The police searched the w,search,/,search,for,/,in search of,1.The officer went up _the murder.,2.The thieves are _the hidden treasure in the museum.,3.Birds fly to the south _the winter sunshine.,to search,searching for,in search of,search/search for/in search of,8.expand:,become greater in size,number or amount,使（某事物）变大，膨胀，使扩大,8.expand:become greater in siz,9.,Thanks to,his research,the UN has more tool in the battle to,rid,the world,of,hunger.,1)thanks to,表示“幸亏,多亏”多用于表达正面意思,相当于感谢,在句中作状语和表语。,多亏你的帮助,减少了许多麻烦。,Thanks to,your help,much trouble was saved,9.Thanks to his research,the,2)ridof,用法,寓词于境,阅读下列句子，注意,rid.of,的意思和用法。,1.The man,rid himself of debt,.,2.It is very hard for the people to,rid the earth of pollution,.,3.The dentist,rid him of his pain,by taking out the tooth.,2)ridof 用法,自我归纳,rid.of,的意思是“,_”,，此时,rid,为,_,词。,常构成短语,rid oneself of sb./sth.,，意为“摆脱、从,中解脱”,(,句,1),；,rid sb./sth.of sb./sth.,意为“去除、清除”（句,2,、句,3,）。,动,摆脱、除去,自我归纳 rid.of的意思是“_,注意,rid,还可以作名词,构成短语,get rid of,意为“摆脱掉、除掉、处理掉”。如,:,Its easy to get into the habit of taking drugs but hard to,get rid of,it.,We cant,get rid of,war until we,get rid of,the causes of war.,注意 rid还可以作名词,构成短语get rid of,即学即练,每空一词，完成句子，使其与所给的句子意思相同或相近。,1.It is not easy for him to get rid of the bad habit.,It is hard for him to _ _ _ the bad habit.,2.He plans to give up smoking in two months.,He plans to _ _ _ smoking in two months.,get rid of/rid himself of,rid himself of,即学即练 每空一词，完成句子，使其与所给的句子意思相同或,高中英语必修4ppt课件-Unit2-language-points,7.Using his hybrid rice,farmers are producing harvests,twice as large as,before.,用他的杂交水稻种子，农民们种出比以前多一倍的粮食。,倍数词（,twice/half/three times/a quarter etc.,）,+as+,形容词或副词原级,+as,表示“是,的多少倍,e.g.The number of the students in our school is _ in their school.,我们学校学生的数量是他们学校的两倍。,twice as large as that,L24,7.Using his hybrid rice,farme,英语中的倍数表达法共有三种形式,:,(1),倍数,+,形容词,/,副词的比较级,+than.,(2),倍数,+as+,形容词,/,副词的原级,+as.,英语中的倍数表达法共有三种形式:,(3),倍数,+the+,名词,+of.,这座楼比那座楼高出五倍。,这座楼是那座楼的五倍高。,This building is,five times,higher,than,that one.,This building is,five times as,high,as,that one.,(3)倍数+the+名词+of.This,这座楼是那座楼的五倍高。