Yep I think I got it now, saying "good" to a question such as "How are you" in Russian, it has to be kept the same(хорошо) and its an adverb, but with adjectives you change depending on your personal gender or whoever you're referring to, so talking to a man I would say:
"ты красивый "
to say "You are beautiful, but to a woman I would say:
"ты красивая"
This sound about right? Sorry if I'm misunderstanding something >.<