Question

not only … but also的用法。

Answer 1

not only...but also的用法规则

Answer 2

这是个常用的关联并列连词，即连接相同的成分和同性质的短语，比如可以连接名词，代词，形容词，动词等。例如：
He is not only our teacherbut also our friend.（连接名词）
Not only he but also she can solve this difficult problem.(连接代词）
This dictionary is not only useful but also cheap.(连接形容词）
He does not only help the poor but also help those disabled(连接动词短语）
总之，对称连接是这个句型结构的特点。