Exception # 3
If it is an adjective of 2 or more syllables, add the word "more" before the adjective, instead of the suffix "er" at the end of the adjective.
This book is ______________ (big) than another one.
very bigger
biger
bigger
more big
The yellow bag is ___________ (expensive) than the brown bag.
more expensiver
expensiver
very expensiver
more expensive
You can be _______________ (lucky) with a four leaf clover.
luckyier
very luckier
more lucky
luckier
My cat is ________________ (beautiful) than her cat.
beautifuler
more beautifuler
most beautiful
more beautiful
Anna is ___________ (thin) than Karen.
more thinner
thinner
very thiner
thiner
Peter is ______________ (tall) than Mary.
very tall
taller
more tall
taler
Exception # 2
If the adjective ends in a consonant + "Y", change the "Y" to "I", and add "er".
My dog is _____________ (small) than yours.
very small
more smaller
smaller
small
Exception # 1
If an adjective is composed by "consonant-vowel-consonant", double the last consonant, and add "er".