【提分秘籍】
1．倍数表达法的常见结构
①A is＋倍数＋比较级＋than＋B
②A is＋倍数＋as＋原级＋as＋B
③A is＋倍数＋the＋名词(size，length，height等)＋of＋B
④A is＋倍数＋that＋of＋B
⑤A is＋倍数＋what引导的名词性从句
The money he earns is three times that of hers.
＝He earns twice more than her.
＝He earns three times as much as her.
＝He earns three times what she earns.
他的收入是她的三倍。
2．如果有名词，表示倍数时可用以下两种结构：
(1)倍数＋more＋名词＋than
(2)倍数＋as many/much＋名词＋其他＋as
Americans eat more than twice as many vegetables per person today as they did in 1910.
