your - ...
yours
tall - ...
taller
My hair is straighter than his hair. My hair is straighter than...
his.
light - ...
lighter
My sister is older than your sister. My sister is older than...
yours.
wavy - ...
wavier
slow - ...
slower
big - ...
bigger
Annette's hair is shorter than my hair. Annette's hair is shorter than...
mine.
short - ...
shorter
Their car is bigger than our car. Their car is bigger than...
ours.
small - ...
smaller
fast - ...
faster
My brother's hair is curlier than your hair. My brother's hair is curlier than...
yours.
red - ...
redder
Our class is bigger than their class. Our class is bigger than...
theirs.
clever - ...
cleverer
My sister's hair is longer than my hair. My sister's hair is longer than...
mine.
nice - ...
nicer
my - ...
mine
straight - ...
straighter
His book is heavier than her book. His book is heavier than...
hers.
bright - ...
brighter
fat - ...
fatter