Dry, drier, driest. Adjective, comparative adjective, superlative adjective.
The comparative and superlative degrees of clean are cleaner and cleanest.
The comparative and superlative degrees of "white" are formed in the standard way: "whiter" and "whitest" respectively.
driest
"Dried" is the past and past participle of dry. As an adjective, the comparative and superlative forms of dry are drier and driest respectively.
more effective, most effective
most effectively
More efficient and most efficient are the comparative and superlative forms of "efficient".
Sleep is a noun and does not have a superlative. Sleepy is an adjective and the superlative is "sleepiest."
The superlative for willing would be "most willing." There is no one-word superlative.
"Studying" is not a superlative, as it is not an adjective. "Most studious" is a superlative of "studious."
"Bib" is a noun and, as such, does not have a superlative form.
most superlative is the superlative form of superlative
Tallest is the superlative.
superlative of quiet
bigger is the comparativebiggest is the superlative
smallest is the superlative. (est is the standard superlative ending._