short - shorter than - the shortest = +er / + est
nice - nicer than - the nicest = +r / +st
big - bigger than - the biggest = verdubbeling medeklinker
busy - busier than - the busiest = verandering van y = ier/ iest
bij 2 lettergrepen of meer: more + most
interesting - more interesting - the most interesting
powerful - more powerful - the most powerful