The superlative of fashionable is "most fashionable."
most fashionable
Comparative: more fashionable Superlative: most fashionable
Adjectives ending in -able are base forms. E. g.,fashion+able - > comparative: more fashionable -> superlative: (the)most fashionable.
If you are talking about a place, you could say, populated or touristy. If you are talking about a person, you could say, fashionable, favorite, hot.
most fashionable
I am fashionable.
Sleep is a noun and does not have a superlative. Sleepy is an adjective and the superlative is "sleepiest."
yes very fashionable.
That is a very fashionable hat!
The superlative for willing would be "most willing." There is no one-word superlative.
"Bib" is a noun and, as such, does not have a superlative form.
"Studying" is not a superlative, as it is not an adjective. "Most studious" is a superlative of "studious."
most superlative is the superlative form of superlative