The more you study,the more you know.

问题描述:

The more you study,the more you know.
为什么说这一句话是状语从句,the more 是状语?如果是那它在句中担当成分么?

因为你的句子的原始句是:
When / if you study more,you know more.--------是时间/条件状语从句呀.the more 是状语,方法状语.