Learn French: Plus tu étudies la grammaire, plus tu maîtrises la langue. - The more you study grammar, the more you master the language.

In English, we say "the more... the more...". In French, you drop the article and just use plus... plus.... Saying le plus... le plus... is a common mistake for English speakers, but it is incorrect for this parallel structure.

Do I pronounce the "s" at the end of plus in this sentence?

Yes! In the parallel comparative structure (plus... plus... or moins... moins...), the "s" in plus is always pronounced, sounding like "plooss" for both instances in the sentence.

Could I change the word order to: Plus tu étudies la grammaire, tu maîtrises plus la langue?

No, the word order is strict. Both halves of the sentence must start with plus, followed immediately by the subject and verb. Think of it as a perfectly balanced scale: Plus + subject + verb, plus + subject + verb.

Why do we say la grammaire instead of just grammaire?

In French, nouns almost always need an article. When talking about concepts in a general or abstract sense, like "grammar" or "language" in this sentence, you must use the definite articles le, la, or les.