Сравнительная степень: Colder, warmer, more not, bigger, more beautiful, more intelligent, smarter, brighter, more famous, more wonderful.
Превосходная степень: (the) coldest, (the) warmest, (the) most not, (the) biggest, (the) most beautiful, (the) most intelligent, (the) smartest, (the) brightest, (the) most famous, (the) most wonderful.