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

题目

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.

答案

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...