The document provides guidelines for using comparatives and superlatives in English. It explains that to form comparatives, -er is usually added to adjectives when using than, and more is used with the base adjective form. To form superlatives, -est is usually added or the is used with the most, except for good, bad, far which take best, worst, furthest as superlatives. Examples are given to illustrate the rules for forming comparatives and superlatives.