"Ten kot nas lubi."

Translation: This cat likes us.

[Douglas754701]

Can I say: Ten kot lubi nas?

[luless]

Yes, this puts emphasis on 'nas'.

[lougtycn]

but when I wrote "ta kobieta lubi je" it was wrong, why?

[Jellei]

We also wouldn't accept "Ten kot lubi nas". We just don't consider that emphasis natural at all, you rarely mean "This cat likes US!" This woman likes THEM!".

[tadjanow]

yes

[JestemJenny]

So "nas" = us, and "nasz" = our?

[Jellei]

Yes.

[MaryCarson15]

Why is nas genitive and not accusative? sorry I have so many questions!

[Jellei]

"nas" is Accusative here, as it's simply the direct object of the verb "lubi".

Although Genitive would be identical.