This document discusses the differences between adjectives and adverbs. Adjectives modify nouns and pronouns by describing qualities like size or color. Adverbs modify verbs, adjectives, and other adverbs by describing manner, time, place, or degree. Some common errors are using an adjective instead of an adverb to modify a verb. Adjectives and adverbs have positive, comparative, and superlative forms to indicate comparisons, but do not use both -er/-est and more/most in the same form. Some examples of irregular adjectives and adverbs are also provided.