What are the comparative and superlative forms of word slowly?

The word "slowly" is already an adverb, meaning it describes a verb. Adverbs typically don't have comparative and superlative forms. Instead, we use other adverbs to express degrees of slowness:

* Comparative: More slowly (e.g., "The car moved more slowly than the truck.")

* Superlative: Most slowly (e.g., "The turtle moved most slowly of all the animals.")

You could also use words like "slower" or "slowest" depending on the context, but remember that these are comparing the speed of two or more things, rather than the slowness itself.