当我们要表达甲是乙的几倍时，通常用下面三个句型来表示：1. “倍数+形容词（或副词）的比较级+than+从句”表示“A比B大（长、高、宽等）多少倍”This rope is twice longer than that one.这根绳是那根绳的三倍（比那根绳长两倍）。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）。2. “倍数+as+形容词或副词的原级+as+从句”表示“A正好是B的多少倍”。Asia is four times as large as Europe.亚洲的面积是欧洲的两倍。The plane flew ten times as high as the kite.那架飞机的飞行高度是那个风筝的十倍（高出九倍）3. “倍数+the size/ height/ length/ width，etc.+of”表示“A正好是B的多少倍”。This street is four times the length of that one.这条街是那条街的四倍长。
