I have a question about the sentence structure "the comparative adjective ... the comparative adjective" and "the comparative adverb ... the comparative adverb." (As in, "The more he practiced, the better he played.")
My question is, is it fine when one of the comparatives is an adjective, and the other is an adverb? When you are talking about people whose lives became busy, can you say this sentence?
The busier their lives became, the less frequently they saw their friends.
I am not sure if this sentence is fine because "the busier" is an adjective, but "the less frequently" is an adverb.