Adverb clause of proportion or proportion clause shows the result of an action in relation to another action.
The most important subordinating conjunctions in this category are "as" and "the . . . the". For example,
- As I listened to him speak, I slowly came to like him.
The same effect is possible with the the... the :
- The more I listened to him, the more I liked him
- The fatter I get, the more I want to eat.
Notice that in these examples a comparative adjective appears in both clauses of
each sentence. "The...the" can only be used when two such adjectives are present.