... as ... as ... can be
结构︰主词+be 动词+as+形容词+as++can be
说明︰此句型意为极，不亚于任何人。此借重复同一个而成为强调此的说法。常用的此类有：as plain as plain can be，as wise as wise can be，as white as white can be，as wrong as wrong can be等。
His failure is as plain as plain can be. 他的失败是再明白不过了。
He is as handsome as can be. 他潇洒极了。
She is as kind as can be. 她极为和颜悦色。
Mary is as hardworking as can be. 玛丽在班上之用功不输任何人。
He may not be so clever as Peter, but he is as industrious as can be.
他也许不如彼得聪明，但却用功极了。
as ... as ever
结构︰as+形容词/副词+as ever
说明︰此句型意为与往常一样。
He seems to be as busy as ever. 他似乎和往常一样忙碌。
He works as hard as ever. 他和往常一样努力工作。
She was as beautiful as ever after so many years. 过了那么多年，她美丽如故。
... times as ... as ...
结构︰倍数词+as+形容词/副词+as
说明︰此句型意为是的几倍。两倍是 twice，而三倍以上的倍，通常用 times。
An ordinary subway train, approaching the station, can be twice as loud as the loudest jet.
平常的地下火车接近车站时，发出的声音可能是最大声的喷射机的两倍。
This line is four times as long as that one. 这条线是那条线的四倍长。
I am twice as old as he. 我的年纪是他的两倍。
She studies three times as hard as I. 她用功的程度是我的三倍。
He earns twice as much as he used to. 他比往常多赚二倍的钱。
She spent half as much money as you. 她花掉的钱只有你花掉的一半。