The document discusses comparative and superlative adjectives. Comparative adjectives compare two objects or people, and are formed by adding "-er" or "more" depending on the adjective. Superlative adjectives compare one object or person to a group, and are formed by adding "the -est" or "the most" depending on the adjective. There are five rules for forming comparatives and superlatives regularly, as well as irregular forms that must be memorized.