Long-longer-the longest
Short-shorter-the shortest
Large-larger-the largest
Big-bigger-the biggest
Fine-finer-the finest
Straight-straighter-the straightest
New-newer-the newest
Old-older/elder-the oldest/the eldest
Few-fewer-the fewest
Young-younger-the youngest
Easy-easier-the easiest
Busy-busier-the busiest
Light-lighter-the lightest
Clean-cleaner-the clearnest
Small-smaller-the smallest
Thin-thiner-the thinest
Thick-thicker-the thickest
High-higher-the highest
Poor-poorer-the poorest