Short - shorter - the shortest
little - less - the least
small - smaller - the smallest
wide - wider - the widest
big - bigger - the biggest
narrow - narrower - the narrowest
young - younger - the youngest
old - older - the oldest
beautiful - more beautiful- the most beautiful
easy - easier - the easiest
many - more - the most
bad - worse - the worst
handsome - more handsome - the most handsome
tall - taller - the tallest
charming - more charming - the most charming
expressive - more expressive - the most expressive
thick - thicker - the thickest
good - better- the best
large - larger - the largest
attractive - more attractive - the most attractive
graceful - more graceful - the most graceful
thin - thinner - the thinnest
early - earlier - the earliest
well-known - better-known - the best-known
good-looking - better-looking - the best-looking
deep-seated - deeper-seated - the deapest-seated
delicate - more delicate - the most delicate
slender - slenderer/more slender - the slenderest/the most slender
careful - more careful - the most careful
broad - broader - the broadest
happy - happier - the happiest
numerous (не уверена ибо звучит странно) - more numerous - the most numerous
considerable - more considerable - the most considerable
lean - leaner - the leanest