"We need a man."
My answer was "mężczyznę" and was, obviously, wrong. What case is this? When would "mężczyznę." be the correct answer?
This is Genitive here, your version was in Accusative. I've seen a lot of natives making this mistake and using Accusative after "potrzebować" - still, a mistake.
When we're learning cases of our language, we do it with usage of a verb that works with this case and questions. For Accusative it's usually: "widzę (kogo? co?)" = I see (whom? what?)
Therefore "mężczyznę" would work for example as "Widzę mężczyznę" = I see a man.
Hmmmm... I guess you're right, but there are some of those masculine nouns that look feminine (they themselves end with -a in Nominative) - so their declension will look as if they were feminine. "mężczyzna" is one of them", so is "tata" or "turysta".
Same. I think I grasp it and then something comes up and throws me again!