большой - bigger, biggest
large - larger, largest
tall - taller, tallest
high - higher, highest
short - shorter, shortest
quick - quicker, quickest
fast - faster, fastest
slow - slower, slowest
loud - louder, loudest
low - lower, lowest
wide - wider, widest
narrow - narrower, narrowest
long - longer, longest
square - squarer, squarest
bright - brighter, brightest
light - lighter, lightest
dark - darker, darkest
heavy - heavier, heaviest
difficult - more difficult, most difficult
old - older, oldest
young - younger, youngest
new - newer, newest
clean - cleaner, cleanest
dirty - dirtier, dirtiest
cheap - cheaper, cheapest
expensive - more expensive, most expensive
busy - busier, busiest
quiet - quieter, quietest