The positive form is the basic adjective or adverb. The comparative form is used for comparing two things, and the superlative form is used for comparing three or more things. Some adjectives and most adverbs form the comparative and superlative by adding the words more , most , less , or least .
Some words form the comparative and the superlative in an irregular manner.
Forms Follow these guidelines to avoid common errors with comparatives and superlatives. This is a better sandwich than yours. This is the best sandwich I've ever made. Use only one method of forming a comparative or superlative at a time. Tom's custom-built car is unique .