Large-larger-the largest
Old-older/elder-the oldest/eldest
Big-bigger-the biggest
Clean-cleaner-the cleanest
Nice-nicer-the nicest
Strong-stronger-the strongest
Brave-braver-the bravest
Wide-wider-the widest
Funny-funnier-the funniest
Little-less-the least
Warm-warmer-the warmest
Good-better-the best