英语倍数的表达方法(必修3-U5)要点.ppt

英语倍数的表达方法 “A 是 B 的 N 倍长” “A 比 B 长N 倍” “A 的长度是 B 的 N 倍” 用英语表达: “A 是 B 的 N 倍长（宽，高，大，重等）” “A 比 B 长（宽，高，大，重等）N 倍” A 的长度（宽度，高度，大小，重量等）是 B 的 N 倍，可用下列几种句型: 1.A + be + 倍数 + as + 计量形容词原级 + as + B.This tree is three times as tall as that one. 这棵树是那棵树的三倍高。His father is twice as old as he. 他父亲的年纪有他两倍大。 We’ve 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。 如：1.亚洲的面积是欧洲的四倍。 Asia is four times as large as Europe. 2.这块大石头的重量是那块的三倍。 This big stone is three times as heavy as that one. 3.那架飞机的飞行高度是那只风筝的十倍。 The plane flew ten times as high as the kite. 4.他拥有的书的数量是他妹妹的3倍。 He has got three times as many books as his sister. 2.“A + be + 倍数 + 计量形容词比较级 + than + B ”The Yangtze River is almost twice longer than the Pearl River.长江差不多比珠江长两倍。The dictionary is exactly five times more expensive than that one.这本字典比那本恰好贵5倍。 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五倍。 如 1.这根绳子是那根绳子的两倍长（比那根绳子长一倍）。 This rope is once longer than that one. 2.这个大厅比我们的教室大四倍(是我们教室的五倍)。 This hall is four times bigger than our classroom. 3.这辆小车的速度比那辆卡车快一倍（是那辆卡车的两倍）。 The car runs once faster than that truck. 4. 我们班的学生人数比他们班多两倍。 There are twice more students in our class than in theirs. 3.“A + be + 倍数 + the + 计量名词 + of + B ”The newly broadened square is four times the size of the previous one.新扩建的广场是未扩建时的四倍大。 计量名词 ：size大, length长, width宽, height高, depth深，weight重 The earth is 49 times the size of the moon. 地球的体积是月球的49 倍。 1.这条街是那条街的四倍长。 This street is four times the length of that one. 2.这座山的高度是那座小山的四倍。 This hill is four times the height of that small one. 4.“The + 计量名词 + of + A + be + 倍数 + （over) that + of + B ”The size of the newly broadened square is four times that of the previous one.新扩建的广场为以前的四倍大。 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。 In this workshop the output of July was three times that of January. 这个车间七月份的产量是元月份的 3 倍。 5. .“The + 计量名词 + of + A + be + 倍数 + what从句 ” The lengt