英语长难句分析

Question

Since the steam engine was fired by coal, the large mills did not need to be located by rivers, as had mills that used water- driven machines.
最后一个逗号之后的as had mills that used water- driven machines. 里面为什么会带个had 啊？？？

Answer 1

高考英语经典长难句分析 　　1.For example, adolescent boys are more likelyto buy computer games than any other group, so it makes senseto make computer game ads that appeal tothis group. 　　【句式翻译】例如，进入青春期的男孩子就可能比任何其他人群更愿意购买电脑游戏，因此，针对这个目标群体制作有吸引力的电脑游戏广告是有意义的。 　　【句式分析】本句是一个含有so引导的结果状语从句的复合句，同时又含有一个than引导的比较状语从句。 　　【词语点拨】1)likely adj. 可能的;常用于句型：sb/sthbe likely to do= it is likely that… 可能做……