When we want to compare two or more things, we can use the compartive and superlative forms of adjectives and adverbs.
* We use the comparative to compare things or people that are different and separate from each other:
The blue book is bigger then the red ones.
* We use the superlative to compare one member of a group with the whole group:
This book is the biggest one on the shelf.
black, blacker, blackest - young, younger, youngest.
late, later, latest - brave, braver, bravest.
big, bigger, biggest - thin, thinner, thinnest.
happy, happier, happiest - lovely, lovelier, loveliest
boring, more boring, the most boring.
With some two-syllable adjectives, there is a choice: clever- cleverer - cleverest or more clever - the most clever. We usually use the forms with more and most.
three or more syllable adjectives
interesting - more interesting - the most interesting.
unhappy - more unhappy - the most unhappy or unhappy - unhappier - unhappiest.