polite- more polite- the most polite
careful- more careful- the most careful
quick- quicker - the quickest
different-more different-- the most different-
narrow- narrower - the narrowest
pretty-prettier- the prettiest
sad- sadder- the saddest
big- bigger- the biggest
happy- happier- the happiest
nice- nicer- the nicest
old- older- the oldest
sweet-sweeter- the sweetest