1. 表示“幾倍大?。ㄩL(zhǎng)短；數(shù)量）”，由“倍數(shù)+ the size（length，amount……）”結(jié)構(gòu)組成。

例如：The earth is forth-nine times the size of the moon. 地球是月亮的49倍大。 2. 表示“……比……大幾倍”，由“倍數(shù)+形容詞（副詞）比較級(jí)”結(jié)構(gòu)組成。例如：This box is three times bigger than that one. 這個(gè)盒子比那個(gè)盒子大三倍。The grain output is 8 percent higher this year than that of last year. 今年比去年糧食產(chǎn)量增加8%。 3. 表示“……是……倍”，由“倍數(shù)+ as +形容詞+ as +”結(jié)構(gòu)組成。例如：Our factory is twice as big as theirs. 我們的工廠是他們的三倍。I have three times as many as you. 我有你三倍那么多。 [注] 一倍用once，兩倍用 twice。

4、還可以用by+倍數(shù)，表示增加多少倍。The production of grain has been increased by four times this year. 今年糧食產(chǎn)量增加了4倍。