Form the degrees of comparison of the following adjectives: old, bad, cold, yellow, loud, clean, large, cosy, comfortable, green, modern, long, red, dark, good, small, interesting, diffi cult, important, easy.

Old - older - the oldest
bad - worse - the worst
cold - colder - the coldest
yellow - ???
loud - louder - the loudest
clean - cleaner - the cleanest
large - larger - the largest
cosy - cosier - the cosiest
comfortable - more comfortable - the most comfortable
green - ???
modern - more modern - the most modern
long - longer - the longest
red - ???
dark - darker - the darkest
good - better - the best
small - smaller - the smallest
interesting - more interesting - the most interesting
difficult - more difficult - the most difficult
easy - easier - the easiest