The document discusses comparative and superlative adjectives. Comparatives are used to compare two objects, like saying "the Ford is bigger than the Toyota." Superlatives compare more than two objects, like saying "the Ford is the biggest." There are five basic rules for forming comparatives and superlatives: adding "-er" or "-est"; doubling consonants; removing "y" and adding "-ier" or "-iest"; adding "more"; and exceptions for common adjectives.