Question

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

Answer 1

happy - happier - happiest
interesting - 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

Answer 2

Sure, here are the 3rd forms of the verbs you provided:

happy - happy, made, made interest - interest, interested, interested ugly - ugly, uglier, ugliest bore - bore, bored, bored expensive - expensive, more expensive, most expensive bad - bad, worse, worst difficult - difficult, more difficult, most difficult wonder - wonder, wondered, wondered old - old, older, oldest