Mary's car is larger than Max's car.Mary's house is the tallest of all the houses on the block.Max is wiser than his brother.Max is the wisest person I know.If the one-syllable adjective ends with a single consonant with a vowel before it, double the consonant and add er for the comparative form; and double the consonant and add est for the superlative form. One-Syllable Adjective Ending with a Single Consonant with a Single Vowel before It Comparative Form Superlative Form big bigger The biggest thin thinner The thinnest fat fatter The fattest My dog is bigger than your dog.My dog is the biggest of all the dogs in the neighborhood.Max is thinner than John.Of all the students in the class, Max is the thinnest.My mother is fatter than your mother.Mary is the fattest person I've ever seen.Two-syllable adjectives.With most two-syllable adjectives, you form the comparative with more and the superlative with most. Two-Syllable Adjective Comparative Form Superlative Form peaceful more peaceful The most peaceful pleasant more pleasant The most pleasant careful more careful The most careful thoughtful more thoughtful The most thoughtful This morning is more peaceful than yesterday morning.Max's house in the mountains is the most peaceful in the world.Max is more careful than Mike.Of all the taxi drivers, Jack is the most careful.Jill is more thoughtful than your sister.Mary is the most thoughtful person I've ever met.If the two-syllable adjectives ends with y, change the y to i and add er for the comparative form. For the superlative form change the y to i and add est. Two-Syllable Adjective Ending with -y Comparative Form Superlative Form happy happier The happiest angry angrier The angriest busy busier The busiest John is happier today than he was yesterday.John is the happiest boy in the world.Max is angrier than Mary.Of all of John's victims, Max is the angriest.Mary is busier than Max.Mary is the busiest person I've ever met.Two-syllable adjectives ending in er, -le, or ow take er and est to form the comparative and superlative forms. Two-Syllable Adjective Ending with -er, -le, or -ow Comparative Form Superlative Form narrow narrower narrowest gentle gentler The gentlest The roads in this town are narrower than the roads in the city.This road is the narrowest of all the roads in California.Big dogs are gentler than small dogs.Of all the dogs in the world, English Mastiffs are the gentlest.Adjectives with three or more syllables.For adjectives with three syllables or more, you form the comparative with more and the superlative with most. Adjective with Three or More Syllables Comparative Form Superlative Form generous more generous The most generous important more important The most important intelligent more intelligent The most intelligent John is more generous than Jack.John is the most generous of all the people I know.Health is more important than money.Of all the people I know, Max is the most important.Women are more intelligent than men.Mary is the most intelligent person I've ever met.Exceptions.Irregular adjectives. Irregular Adjective Comparative Form Superlative Form good Better the best bad Worse the worst far Farther the farthest little Less the least