But it's not so simple.
of course not :)
In English we say She speaks English very well, but we say Her perfume smells good.
From my (Polish) point of view the fact that I have to use adjectives instead of adverbs after verbs: to be, become,seem, feel, grow, look, prove, remain, smell, sound, taste, turn (there may be more of them, these are the ones I've found in my English course book) is just a quirk of English language, I've accepted the rule and try to use it, although it seems illogical to me. You can not expect that rules of English language will be transferred into Polish, it has its own rules.
Jak było?" - How was it? "Było dobrze.
here is the indication of how to use adverbs in Polish - if the questions starts with 'jak' - you answer with adverb, If it starts with 'jaki' you use adjective, but of course to know how to create a question to an answer you would have to speak Polish very well ;)