Bright - brighter - the brightest
clever - cleverer - the cleverest
simple - simplier - the simpliest
comfortable - more comfortable - the most comfortable
generous - more generous - the most generous
far - farther - farthest (если речь идет о расстоянии)
little -less - the least, либо smaller - the smallest
expensive - more expensive - the most expensive
much - more - the most
shy - shier - the shiest