SUPERLATIVES

Superlatives
One-syllable words	Two syllable words ending in y	Two syllables or more not ending in y
add est	drop the y and ad iest	use most / don't add est
big biggest	noisy noisiest	dangerous most dangerous
old oldest	busy busiest	expensive most expensive
nice nicest	crazy craziest	comfortable most comfortable
young youngest	lazy laziest	humid most humid
fast fastest	funny funniest	tired most tired
cheap cheapest	dry driest	acceptable most acceptable
There are some exceptions: good, bad, far, and fun are adjectives that don't follow the rules when making the comparative form.
good best	bad worst	far farthest
fun most fun

The superlative form is used to show the difference among three or more things or people in a group.

Let’s put in practice in this page:

http://www.englishexercises.org/makeagame/viewgame.asp?id=1876