The document discusses the jobs and uses of adjectives, adverbs, comparatives, and superlatives in sentences. It provides examples of how adjectives modify nouns and follow linking verbs, how adverbs modify verbs and other adverbs by describing how, when, where or why something is done, and how to use comparatives and superlatives to compare two or more people, places, things or ideas. Common errors when using words like good, well, bad and badly are also addressed.