This document discusses the formation of comparative and superlative adjectives and adverbs in English. It explains that one-syllable adjectives and adverbs form the comparative with "-er" and the superlative with "-est". Two-syllable adjectives typically form the comparative and superlative with "more" and "most". However, some two-syllable adjectives can also use "-er" and "-est". A few common adjectives and adverbs have irregular comparative and superlative forms, such as "good/well - better - best" and "bad/badly - worse - worst".