一、表示“几倍大小(长短、数量)”
1. The earth is 49 timesthe size of the moon.(地球是月亮的49倍大)
2. This bottle contains 5 timesthe amount of water as that one.(这个瓶子里的水是那个瓶子的5倍)
二、表示“……比……大几倍”(用于不可数名词或抽象概念)
1. The grain output is 8 percent higherthis year than that of last year.(今年粮食产量比去年高8%)
2. The company's profits have doubledover the past five years.(公司利润在过去五年翻了一番)
三、表示“……是……倍”(用于可数名词或抽象概念)
1. Our factory is twice as bigas theirs.(我们的工厂是他们的两倍大)
2. The number of students in our class is three timesthat of the other class.(我们班的学生人数是另一个班的三倍)
四、特殊用法示例
1. This street is four times shorterthan the main road.(这条街比主路短四倍)
2. The cake is twice as sweetas the one I had yesterday.(这个蛋糕的甜度是昨天那个的两倍)
注意事项:
倍数表达需结合具体语境选择结构:比较大小用"倍数+形容词/副词比较级",表示"是……倍"用"倍数+as+形容词/副词原级+as";
避免混淆:"A比B多几倍"实际是"A是B的几倍加B",例如A比B多2倍,实际是A=3B;
数学计算中,求倍数用除法(如32是8的几倍?32÷8=4),求"几倍"的量用乘法(如8的4倍是?8×4=32)。