COMPARISON OF ADJECTIVES

FORMING THE COMPARATIVE AND SUPERLATIVE
 

Number of syllables	Comparative	Superlative
one syllable	+ -er	+ -est
tall	taller	tallest
one syllable with the spelling consonant + single vowel + consonant: double the final consonant:
fat	fatter	fattest
big	bigger	biggest
sad	sadder	saddest
Number of syllables	Comparative	Superlative
two syllables	+ -er OR more + adj	+ -est OR most + adj
ending in: -y, -ly, -ow ending in: -le, -er or -ure these common adjectives - handsome, polite, pleasant, common, quiet
happy	happier/ more happy	happiest/ most happy
yellow	yellower/ more yellow	yellowest/ most yellow
simple	simpler/ more simple	simplest/ most simple
tender	tenderer/ more tender	tenderest/ most tender
If you are not sure, use MORE + OR MOST + Note: Adjectives ending in '-y' like happy, pretty, busy, sunny, lucky etc:. replace the -y with -ier or -iest in the comparative and superlative form
busy	busier	busiest
Number of syllables	Comparative	Superlative
three syllables or more	more + adj	most + adj
important	more important	most important
expensive	more expensive	most expensive

Examples: 

a. A cat is fast, a tiger is faster but a cheetah is the fastest
b. A car is heavy, a truck is heavier, but a train is the heaviest
c. A park bench is comfortable, a restaurant chair is more comfortable, but a sofa is the most comfortable