Comparing people, things....
1. For the following groups of words the comparative and superlative are formed by adding an -er or -est
a. monosyllabic words - words consisting of one syllable - short words:
e.g.: short - shorter - shortest
cheap - cheaper - cheapest
....mind the spelling!
fat - fatter - fattest
slim - slimmer - slimmest
late - later – latest (if the words ends in vowel and consonant -> consonant is doubled)
large - larger – largest (if an adjective ends in e ->the e gets lost
b. adjectives ending in -y:
e.g.: happy - happier - happiest
easy - easier - easiest
bei quiet, simple, narrow, shallow, clever ... both are possible
2. All other adjectives form their comparatives using more and most:
e.g.: interesting - more interesting - most interesting
beautiful - more beautiful - most beautiful
3. Irregular forms:
good - better - best
bad - worse - worst
many – more – most
much – more - most
4. How to make comparisons:
if they are of the same size, quality,...we use: ...as...as...
Johnny is as tall as Greg.
I'm as old as Rick.
if there is a difference between two: not as......as, (=not so.....as), than.
Greg is not as old as Mary.
My sister is older than I am.
5. The superlative:
He's the tallest.This is the fastest car we have
Source : Grammar Tutorial