What are the comparative and superlative forms of word soon?

The word "soon" is an adverb, and adverbs generally do not have comparative or superlative forms. There is no way to say something is "more soon" or "most soon."

However, you can use other adverbs to express the same meaning in a comparative or superlative sense:

* Comparative: You could use sooner to indicate something happening earlier than something else.

* Superlative: You could use soonest to indicate something happening at the earliest possible time.

For example:

* "I will come sooner than you think." (Comparative)

* "I'll try to arrive soonest." (Superlative)