一 . 表达倍数的三个基本句型1.“ A+be动词 / 谓语动词 + 倍数 +as+ 形容词 / 副词原级 +as+B ”，表示“ A 正好是 B的多少倍”。例如：Asia is four times as large as Europe.亚洲的面积是欧洲的四倍。This big stone is three times as heavy as that one.这块大石头的重量是那块的三倍。The plane flew ten times as high as the kite.那架飞机的飞行高度是那只风筝的十倍。2. “A+be动词 / 谓语动词 + 倍数 + 形容词 / 副词比较级 +than+B”，表示“ A 比 B 大（长、高、宽等）多少倍”。例如：This rope is twice longer than that one.这根绳子比那根绳子长两倍（是那根绳子三倍长）。This hall is five times bigger than our classroom.这个大厅比我们的教室大五倍(是我们教室的六倍大)。The car runs twice faster than that truck.这辆小车的速度比那辆卡车快两倍（是那辆卡车的三倍快）。3. “A+be动词 + 倍数 +the size/height/length/width, etc+of+B”，表示“ A 正好是 B 的多少倍”。例如：This street is four times the length of that one.这条街是那条街的四倍长。This hill is four times the height of that small one.这座山的高度是那座小山的四倍。除表达倍数的三个基本句型外，我们还要掌握其基本句型的7 种变形。1. “ ... times as many/much+名词 +as+ 被比对象”。例如：There is four times as much water in this pot as in that one.这个壶里装的水是那个壶里的四倍。There are six times as many students as we expected.学生数量是我们预期的六倍。2. “ ... times+more+名词（可数或不可数）+than+被比对象”。例如：There are five times more books in our library than in yours.我们图书馆里的书比你们图书馆多五倍多。We have produced twice more grain this year than we did last year.我们今年生产的粮食是去年的两倍多。3.“ ... times+over+被比对象”。例如：The grain output in that village is twice over that of 2002.那个村的粮食产量是2002 年的两倍多。4. “ ... times+that+of+被比对象 ”。例如：In this workshop, the output of July was 4.5 times that of January.这个车...
