тяжелый - ... - ...
heavy - heavier - the heaviest
thick - ... - ...
thicker - the thickest
... - bigger - ...
big - the biggest
тонкий - ... - ...
thin - thinner - the thinnest
cheap - ... - the cheapest
cheaper
expensive - ... - ...
more expensive - the most expensive
тяжелый - ... - ...
more difficult - the most difficult
small - ... - the smallest
smaller
bad - worse - ...
the worst
easy - ... - ...
easier - the easiest
good - ... - the best
better