We can add er to most short adjectives to compare two nouns or pronouns.
If an adjective ends with a y, we must change the y to i before adding er or est to the adjectives.
My hair is curlier on one side.
The smaller dog is looking up at the bigger dog.
The purple cupcake is happier than the green one.
We can add est to most short adjectives to compare more than two nouns or pronouns.
The boy in the red shirt is the shortest.
This is the largest ring I own.
My grandmother is the oldest person in my family.