What are the rules for forming comparatives and superlatives of three-syllable adjectives?

What are the rules for forming comparatives and superlatives of three-syllable adjectives?

The rules for forming comparatives and superlatives of three-syllable adjectives are as follows:

1. For most three-syllable adjectives, you add the word "more" before the adjective to form the comparative and "most" before the adjective to form the superlative. For example: more beautiful, most beautiful.

2. If the three-syllable adjective ends in -y, -ow, -er, or -le, you can add the suffix -er to form the comparative and -est to form the superlative. For example: happier, happiest; narrower, narrowest; gentler, gentlest.

3. Some three-syllable adjectives have irregular forms for the comparative and superlative. These forms need to be memorized. For example: better, best; worse, worst; farther, farthest.

It is important to note that not all three-syllable adjectives follow these rules, and some may have their own unique forms for comparatives and superlatives.