下面这句话中 从 by her ease and liveliness,后的语法结构

问题描述:

下面这句话中 从 by her ease and liveliness,后的语法结构
It was an union that must have been to the advantage of both—— by her ease and
liveliness,his mind might have been softened,his manners improved;and from
his judgment,information,and knowledge of the world,she must have received
benefit of greater importance.

1.by her ease and liveliness 介宾短语做状语his mind (并列句第一分句,下同)主语;might have been softened 系表结构做谓语his manners (并列句第二分句,下同)主语;(might have been) improved 系表结构做谓...