Studying a lot.
She was known for being a studious student, always seen with her nose buried in a book.
most studious
Studiousness.
More studious
The glasses made her look very studious. The studious group met every day to review their notes. The scholar's studious habits helped him maintain his 4.0 gpa.
The kid was very studious and tried hard.
more studious, most studious
comaparative : more industrious superlative: most industrious
Finals week is a very studious time.
becaue she is a studous girl that's why
"Studying" is not a superlative, as it is not an adjective. "Most studious" is a superlative of "studious."
"Studios" is a plural noun. Nouns don't have a comparative or superlative degree. If you meant studious, that would be more studious and most studious.