Comparative and Superlative Adjectives

One-syllable adjectives.

-You make the comparative form adding "er" and "est" for the superlative.  

Adjective	Comparative Form	Superlative Form
tall	taller	tallest
old	older	oldest

Mary is taller than Max.

Of the three students, Max is the oldest.

-If the adjective ends with an "e", just add "r" for the comparative form and "st" for the superlative form.

Adjective	Comparative Form	Superlative Form
large	larger	largest
wise	wiser	wisest

Mary's car is larger than Max's car.

Max is the wisest person I know.

-If ends with a single consonant ,you adding double the consonant and add "er" for the comparative form; and double the consonant and add  "est" for the superlative form.

Adjective	Comparative Form	Superlative Form
big	bigger	biggest
thin	thinner	thinnest

My dog is the biggest of all the dogs in the neighborhood.

Max is thinner than John.

Two-syllable adjectives.

Two-syllable adjectives.

-You form the comparative adjective with "more" and the superlative adjective with "most".

Adjective	Comparative Form	Superlative Form
peaceful	more peaceful	most peaceful
careful	more careful	most careful

This morning is more peaceful than yesterday morning.

Of all the taxi drivers, Jack is the most careful.

-If the adjective ends with "y", change the "y" to "i" ,and applies the first rule of the one-syllable adjectives.

Adjective	Comparative Form	Superlative Form
happy	happier	happiest
angry	angrier	angriest

John is happier today than he was yesterday.

Of all of John's victims, Max is the angriest.

-Also applies the first rule at adjectives ending in "er", "le", "or","ow".        

Adjective	Comparative Form	Superlative Form
narrow	narrower	narrowest
gentle	gentler	gentlest

The roads in this town are narrower than the roads in the city.

Of all the dogs in the world, English Mastiffs are the gentlest.

-Also there adjectives that can be used with "er" and "est" and with "more" and "most".

Adjective	Comparative Form	Superlative Form
gentle	gentler	gentlest
	more gentle	most gentle

Big dogs are gentler than small dogs.

Of all the dogs in the world, English Mastiffs are the gentlest.

Big dogs are more gentle than small dogs.

Of all the dogs in the world, English Mastiffs are the most gentle.

Adjectives with three or more syllables.

You make the comparative form with "more" and the superlative with "most".

Adjective	Comparative Form	Superlative Form
generous	more generous	most generous
important	more important	most important

John is the most generous of all the people I know.

Health is more important than money.

Exceptions.

Irregular adjectives.

Irregular Adjective	Comparative Form	Superlative Form
good	better	best
bad	worse	worst
far	farther	farthest
little	less	least
many	more	most

Italian food is better than American food.

My dog is the best dog in the world.

My mother's cooking is worse than your mother's cooking.

Of all the students in the class, Max is the worst.
*a characteristic that identify of the comparative adjective is to be next to the word "than".