I understood that a native might say "noi n-avem", or "eu n-am".
True? And is it then also correct to say the whole "nu"?
Yes and yes. You can think of it as the relation between "it is" and "it's".
Cool. You guys got your contractions, too. :D
It feels just like the difference between "We do not have the apple" vs "We don't have the apple."
Is the word" marul" pronounced correctly here? I am a real beginner. I hear mar-wheel . Is"ul" pronounced like that?