happy 3 формы
interesting 3 формы
ugly 3 формы
boring 3 формы
expensive 3 формы
bad 3 формы
difficult 3 формы
wonderful 3 формы
old 3 формы

happy - happier - happiestinteresting - more interesting - most interestingugly - uglier - ugliestboring - more boring - most boringexpensive - more expensive - most expensivebad - worse - worstdifficult - more difficult - most difficultwonderful - more wonderful - most wonderfulold - older - oldest