英语中“倍数”的表达方式归纳(课堂PPT).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,*,*,英语中“倍数”的表达方式归纳,1,倍数英语中“倍数”的表达方式归纳,The house rent is expensive.Ive got about half the space I had at home and Im paying _ here.A.as three times muchB.as much three timesC.much as three timesD.three times as much,正确答案为,D,2,倍英语中“倍数”的表达方式归纳数,一、用,times,表示倍数（一般限于包括基数在内三倍或三倍以上的数。表示两倍的数，一般用,twice,）。其句式有：,1.,“times,形容词,/,副词的比较级,than”,例如：,Line AB is three times longer than line CD.,线段,AB,是（线段）,CD,的三倍长。,This hall is five times bigger than our classroom.,这个大厅比我们的教室大,5,倍。,3,Line AB is long.,Line AB is longer than line CD.,Line AB is three times longer than line CD.,This hall big.,This hall bigger than our classroom.,This hall is five times bigger than our classroom.,4,倍英语中“倍数”的表达方式归纳数,2.,“times+as+,形容词,/,副词的原级,as”,例如：,This table is three times as long as that one.,这张桌子是那张桌子的三倍长。,This dictionary is five times as thick as the one you borrowed from the library.,这本词典的厚度是你从图书馆借的那本（厚度）的,5,倍。,5,This table is long.,This table is,as long as that one(is).,This table is,three times,as long as that one(is).,This dictionary thick.,This dictionary is,as thick as,that one(is),.,This dictionary is,five times as thick as,that one(is),.,This dictionary is five times as thick as,the one you borrowed from the library(is).,6,倍英语中“倍数”的表达方式归纳数,3.“times+the+,名词（如：,size,，,height,，,weight,，,length,，,width,等）,of”,例如：,The earth is 49 times the size of the moon.,地球的体积是月球的,49,倍。,This river is three times the depth of that one.,这条河是那条河的三倍深。,7,倍英语中“倍数”的表达方式归纳数,4.“times+more,名词,than”,例如：,He earns five times more money than he did ten years ago.,他现在挣的钱比十年前挣的多,5,倍。,There are twice more students in our class than in theirs.,我们班的学生人数比他们班多两倍。,8,倍英语中“倍数”的表达方式归纳数,5.“times+as many,（或,much,）名词,as”,例如：,Weve produced twice as much cotton this year as,（,we did,）,ten years ago.,今年我们生产的棉花比十年前多了一倍。（汉语中的多一倍实际上也指两倍一样多。）,He has got three times as many books as his sister.,他拥有的书的数量是他妹妹的,3,倍。,9,Weve produced much cotton,this year,Weve produced,as much cotton,this year,as,（,we did,）,ten years ago,.,Weve produced,twice as much cotton,this year,as,（,we did,）,ten years ago,.,He has got,many books,.,He has got as,many books as,his sister(has).,He has got,three times as many books as,his sister(has).,10,倍英语中“倍数”的表达方式归纳数,6.“times+what,从句”例如：,The length of the road is four times what it was three years ago.,这条路的长度是三年前的,4,倍。,The price of the meat is twice what it was last year.,肉价是去年的两倍。,11,倍英语中“倍数”的表达方式归纳数,7.“times+up on,（或,over,）,”,例如：,The size of the sun is a million times over that of the earth.,太阳的体积比地球的体积大一百万倍。,He is three times up on your age.,他的年龄是你的,4,倍（或：比你的年龄大,3,倍）。,12,倍英语中“倍数”的表达方式归纳数,8.“+by+times”,例如：,Compared with last year,，,our coal output has increased by three times.,与去年相比，我们的煤产量增长了,3,倍。,His speed is faster than mine by four times.,他的速度比我的快,4,倍。,13,倍英语中“倍数”的表达方式归纳数,9.“times+compared with,被比较对象”例如：,The number of the students in our school has increased three times compared with 1980.,我们学校的学生人数比,1980,年增加了,3,倍。,14,倍英语中“倍数”的表达方式归纳数,10.“times+that of+,被比较对象”,例如：,In this workshop the output of July was 3.5 times that of January.,这个车间七月份的产量是元月份的,3.5,倍。,15,倍英语中“倍数”的表达方式归纳数,二、用分数、百分数表示倍数。例如：,The box is one-third bigger than that one.,这个盒子比那个盒子大三分之一。,Last year the output value of industry was 59 percent higher than that of 1976.,去年工业产值比,1976,年增长了,59,。,My command of English is not half so good as yours.,我英语掌握得还不及你的一半儿好。,16,倍英语中“倍数”的表达方式归纳数,三、用,again,（一倍）,double,（两倍），,triple,（三倍）,fourfold,（四倍）等词表示倍数。例如：,My Aunt is as old again as I am.,我姑姑的年龄比我大一倍。,The top-brand clothes are often sold as double the normal price here.,这里名牌衣服的售价经常比正常的售价高一倍。,The new work procedure tripled the output.,新工艺使产量增加两倍。,The output of grain increased fourfold.,粮食产量增加了三倍。,17,巩固练习,Americans eat _ vegetables per person today as they did in 1910.A.more than twiceB.as twice as manyC.twice as many asD.more than twice as many,Key,：,D,18,巩固练习,Paper produced every year is _ the worlds production of vehicles.A.the three weight ofB.three times the weight ofC.as three times heavy asD.three times as heavier as,Key,：,B,19,巩固练习,With the help of the German experts,，,the factory produced _ cars in 1993 as the year before.A.as twice manyB.as many twiceC.twice as manyD.twice many as,Key,：,C,20,巩固练习,This ship measures _ that one.A.as twice as longB.as twice long asC.twice long asD.twice as long as,Key,：,D,21,巩固练习,After the new technique was introduced,，,the factory produced _ tractors in 1988 as the year beforeA.as twice manyB.as many asC.as twice as manyD.twice as many,Key,：,D,22,