Language / Jak sie masz -> niezle, doskonale. Wyglada ladnie - grammar questions [45]

"I am good/not bad/etc. " has the same sentence structure as "she is beautiful" (pronoun, verb "to be" and adjective). I might be wrong, but it seems like the verb "to be" always requires an adjective and cannot be followed by an adverb. The function of an adverb in English is to describe an action while adjectives refer to a certain state. The same goes for the verbs "to look", "to smell", "to taste" when they do not talk about actions (the flowers smell wonderful, the cake tasted really good, she looks beautiful), they are all followed by adjectives.)

Polish is more complicated, but we seem to use adjectives after "byc" (jestem zadowolona, jestes szczesliwy, dom jest pusty). The rest of the verbs seem to require advebs (kwiaty pachna ladnie, dziewczynka wyglada pieknie, samochod jedzie szybko, etc.) "Jak sie masz?" has the verb "miec" and not "byc", therefore it is followed by an adverb "mam sie dobrze", but we drop the verb in the reply. Those are just my observations, we would have to talk to a linguist to get the right answer. Have fun learning Polish!