as后的倒装He had spent his life brewing beer for the brewery,as had his father and grandfather before him.这里的as后倒装了,应该是相当于as his father and grandfather before him had done.那么这样的倒装,as是怎么用的呢?

今天我遇到了相同的问题,上网搜的时候看到了你这个句子.我找到三点：
比较从句的倒装：
as,than引导的比较从句中,如果主语是名词短语且较长,经常采用倒装结构(不倒装也可以).注意：这种结构主语一般为名词,如果是代词则不倒装.如：
Hydrogen burns much more cleanly than do other fuels and is easy to produce.
Today’s electric cars cannot go as fast as gasoline-driven vehicles because the battery does not offer the same amount of energy as does gasoline combustion.
Reading is to the mind as is exercise to the body.
（以上资料来源：http://wenku.baidu.com/view/209185b369dc5022aaea006b.html）
  2.   我搜这句话的时候看到了它在China Daily里一篇文章的原文--"The Brewer's Son"
  3.  我在“黄冈中学2006届高三英语第二轮专题训练(三)”里看到了类似的一句,是一篇完形填空,它的答案在网页那篇文章的第三页
 
那么现在我自己脑子里大概有数了,可是这个问题是你那么久之前提的,希望你早已找到了自己的答案,万一如果没有的话,希望你能看到这个回复.