Form and rules
How it works
1
With many short adjectives, add -er: tall → taller, old → older.
2
If a short adjective ends in -e, add -r: nice → nicer. If it ends consonant-vowel-consonant, often double the final consonant: big → bigger.
3
If it ends consonant + y, change y to i and add -er: happy → happier.
4
With many longer adjectives, use more + adjective: more expensive, more interesting.
5
Use than when you state the second thing in the comparison. Irregular forms include good → better and bad → worse.