We use comparatives to compare one person, thing, action or event or group, with another of the same kind.
Superlative forms are used to compare somebody or something with the whole group it belongs to.
John is taller than his sister. (comparative)
John is the tallest student in his group. (superlative)
Cancun is more expensive than Puerto Vallarta. (comparative)
Mexico city is one of the most exciting cities in Mexico. (superlative)
All comparative and superlative forms are made from adjective forms.
For an adjective to become a comparative it needs to add either the prefix "more" or the suffix "-er".
For the adjective to become a superlative it needs to add the prefix "most" before it or the suffix "est" after it.
Soft Softer Softest
Cold Colder Coldest
Modern More modern Most modern
Expensive More expensive Most expensive
Adjectives of one syllable will add "er" in order to change them to the comparative form.
John is younger than Steve.
Yucatan is warmer than Guadalajara.
My cell phone is newer than yours.
Adjectives of one syllable will add "est" in order to change them to the superlative form.
John is the youngest student in the class.
Mexicali is the warmest city in Mexico.
I want to buy the newest cell phone in the store.
One silable adjecives that end in a consonant-vowel-consonant will duplicate their last consonant and will add "er" to change them to the comparative form and "est" to change them to the superlative form.
Big Bigger Biggest
Thin Thinner Thinnest
Sad Sadder Saddest
Michoacan is a bigger state than Colima. (comparative)
chihuahua is the biggest state in Mexico. (superlative)
Steve is thinner than her sister Joan. (comparative)
Steve is the thinnest in his family. (superlative)
George is fatter than his cousin Bob. (comparative)
George is the fattest man in Monterrey. (superlative)
Two syllable adjectives ending in a final "y" with a consonant before it will change the "y" for an "i" and will add "er" for the comparative and "est" for the superlative forms.
Happy Happier Happiest.
Easy Easier Easiest.
Lucky Luckier Luckiest.
Samantha looks happier than her brother Bob. (comparative)
Marc is the happiest person I have ever met.
Some two syllable adjectives that end in an unstressed syllable /ə/, /l/, /r/ will add "er" or "est" endings when changed to the comparative forms.
Narrow Narrower Narrowest
Simple Simpler Simplest
Clever Cleverer Cleverest
Quiet Quieter Quiestest
Adjectives of two or more syllables will add "more" when used as comparatives and "most" when used as superlatives.
Interesting more interesting most interesting
Expensive more expensive most expensive
Crowded more crowded most crowded
Exciting more exciting most exciting
This book is more interesting than the book that I read last month.
This book is the most intersting in the bookstore.
Puerto Vallarta is more expensive than Guayabitos.
Los Cabos is the most expensive beach in Mexico.
If you want to increase the level of difference with a comparative you may use "much".
John is younger than my brother Marc. (John is 20 and Marc is 22)
John is much younger than Steve. (John is 20 and Steve 28)
