Adjectives have three forms: positive, comparative, and superlative. The positive form describes one object or person. The comparative form compares two objects or people, and is formed by adding "-er" or using "more" in front of the positive form. The superlative form compares three or more objects or people, and is formed by adding "-est" or using "most" in front of the positive form. There are some rules for forming the comparative and superlative forms of adjectives based on the number of syllables and accent of the positive form.