倍数表达法经典总结.ppt

一、用一、用 times times 表示倍数（一般限于包括基表示倍数（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数在内三倍或三倍以上的数表示两倍的数 ，一般用，一般用 twice twice ）其句式有：）其句式有：( (前三种为前三种为 主主) ) 1. “… times 1. “… times ＋形容词＋形容词 / / 副词的比较级＋副词的比较级＋ than …”than …”例如：例如： This rope is twice longer than that oneThis rope is twice longer than that one．． This hall is five times bigger than our classThis hall is five times bigger than our class roomroom．． 2. “… times +as + 2. “… times +as + 形容词形容词 / / 副词的原级＋副词的原级＋ as …”as …” 例如：例如： This dictionary is five times as thick as the This dictionary is five times as thick as the one you borrowed from the library.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）的这本词典的厚度是你从图书馆借的那本（厚度）的 5 5 倍。

倍 This big stone is three times as heavy as thThis big stone is three times as heavy as th at oneat one．． 这块大石头的重量是那一块的三倍这块石头比那块重这块大石头的重量是那一块的三倍这块石头比那块重 二倍）二倍） The plane flew ten times as high as the kiteThe plane flew ten times as high as the kite．． 那架飞机飞行高度是那个风筝的十倍高出九倍）那架飞机飞行高度是那个风筝的十倍高出九倍） 3. “… times + the + 3. “… times + the + 名词（如：名词（如： sizesize，， heightheight，， weightweight，， lengthlength，， width, agewidth, age等等 ）＋）＋ of …”of …”例如：例如： The earth is 49 times the size of the moon. The earth is 49 times the size of the moon. 地球的体积是月球的地球的体积是月球的 49 49 倍。

倍 This river is three times the depth of that This river is three times the depth of that one. one. 这条河是那条河的三倍深这条河是那条河的三倍深 This hill is four times the height of that smaThis hill is four times the height of that sma ll onell one．这座山的高度是那座小山的四倍．这座山的高度是那座小山的四倍 （比那座小山高三倍）（比那座小山高三倍） 4. “… times + more 4. “… times + more ＋名词＋＋名词＋ than …”than …” 例如：例如： He earns five times more money than He earns five times more money than he did ten years ago.he did ten years ago. 他现在挣的钱比十年前挣的多他现在挣的钱比十年前挣的多 5 5 倍。

倍 There are twice more students in our There are twice more students in our class than in theirs.class than in theirs. 我们班的学生人数比他们班多两倍我们班的学生人数比他们班多两倍 5. “… times +as many 5. “… times +as many （或（或 much much ）＋）＋ 名词＋名词＋ as …”as …”例如：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 6. “… times + what 6. “… times + what 从句从句” ”例如：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 7. “… times + up on 7. “… times + up on （或（或 over over ））…”…”例例 如如： 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） 8. “… +by + … times ”8. “… +by + … times ”例如：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 9. “… times + compared with 9. “… times + compared with ＋被比较＋被比较 对象对象” ”例如：例如： The number of the students in our school has The number of the students in our school has increased four times compared with 1980.increased four times compared with 1980. 我们学校的学生人数比我们学校的学生人数比 1980 1980 年增加了年增加了4 4倍。

倍 10. “… times + that of + 10. “… times + that of + 被比较对象被比较对象” ”例例 如：如： In this workshop the output of July was three times In this workshop the output of July was three times that of January.that of January. 这个车间七月份的产量是元月份的这个车间七月份的产量是元月份的 3 3 倍 ［倍数［倍数 巩固练习］巩固练习］ 1.Americans eat ____ vegetables per 1.Americans eat ____ vegetables per person today as they did in 1910.person today as they did in 1910. A. more than twice B. as twice as manyA. more than twice B. as twice as many C. twice as many as C. twice as many as D. more than twice as manyD. more than twice as many 2. Paper produced every year is ____ the 2. Paper produced every year is ____ the worlds production of vehicles.worlds production of vehicles. A. the three weight of A. the three weight of B. three times the weight ofB. three times the weight of C. as three times heavy as C. as three times heavy as D. three times as heavier asD. three times as heavier as 3. With the help of the German experts3. With the help of the German experts，， the factory produced ____ cars in 1993 as the factory produced ____ cars in 1993 as the year before.the year before. A. as twice many B. as many twiceA. as twice many B. as many twice C. twice as many D. twice many asC. twice as many D. twice many as 4. This ship measures ____that one.4. This ship measures ____that one. A. as twice as long B. as twice long asA. as twice as long B. as twice long as C. twice long as D.。