1
big
biggest
slow
slower
happy
happier
good
better
cold
colder
long
longest
lovely
more lovely
rich
richer
worried
more worried
strong
stronger
thin
thinnest
hungry
hungrier
beautiful
more beautiful
difficult
more difficult
little
less
careless
more careless
handsome
more handsome
expensive
more expensive
much
more
popular
more popular
modern
more modern
famous
more famous
far
further/ farther
interesting
more interesting
useful
more useful