Make up the degrees of comparison of the following adjectives:big, little,

Big - bigger -the biggest
little- less - the least
pure- purer - the purer
large- larger- the largest
good- better- the best
difficult- more difficult- the most difficult
small- smaller - smalest
bad- worse - the worst
low- lower-the lowest
deep-deepper - the deppest
many- more - much
necessary- more necessary - the most necessary
important - more important - the most important