Long longer the longest. Так же нужно сделать со следующими словами:bright difficult good happy lazy hot bad big silly interesting

bright-brighter - the brightest

difficult-more difficult-most difficult good - better - (the) best

happy-happier-happiest

lazy-lazier-laziest

hot-hotter - most hot

bad-worse - worst

big-bigger - biggest

silly-sillier-silliest

interesting-more interesting - most interesting