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1) clever cleverer the cleverest 2) nice nicer the nicest 3) big bigger the biggest 4) short shorter the shortest 5) young younger the youngest 6) good better the best 7) bad worse the worst 8) interesting more interesting the most interesting 9) beautiful more beautiful the most beautiful 10) cold colder the coldest 11) warm warmer the warmest 12) small smaller the smallest 13) strong stronger the strongest 14) happy happier the happiest