Ответ:

hot hotter the hottest

fat fatter the fattest

great greater the greatest

happy happier the happiest

nasty nastier the nastiest

expensive more expensive the most expensive

comfortable more comfortable the most comfortable

good better the best

bad worse the worst

difficult more difficult the most difficult

interesting more interesting the most interesting

wonderful more wonderful the most wonderful

serious more serious the most serious

beautiful more beautiful the most beautiful

big bigger the biggest

hot hotter hottest

fat fatter fattest

great greater greatest

happy happier happiest

nasty nastier nastiest

expensive ,more expensive ,the most expensive

comfortable, more comfortable, the most comfortable

good gooder goodest

bad badder baddest

difficult, more difficult, the most difficult

interesting, more interesting, the most interesting

wonderful, more wonderful, the most wonderful

serious, more serious, the most serious

beautiful, more beautiful, the most beautiful

dangerous, more dangerous, the most dangerous

big bigger the biggest