"Ten sok nie jest kawą."

Translation: This juice is not coffee.

[EvaWoodruff]

the sentence is correct without an article

[GiacomoBia16]

Some issue. Could I translate it as "this juice is not a coffee"?

[Jellei]

Makes sense to me, added.

[Elias.M.A]

Is "kawą" in genitive form?

[Jellei]

No, it's Instrumental. Genitive is "kawy".

[Matthew_Phelps]

• Jestem człowiekiem.
• Nie jesteś człowiekiem. ale...
• Nie wiem tego człowieka. ... to prawda czy nie? it's negation for direct objects not subject complements

[Jellei]

Well, negation makes the noun phrase use Genitive only if it was in Accusative before the negation. Well, or if it was in Genitive already ;)

You can't say "Nie wiem tego człowieka". You use "wiedzieć" in sentences like "I know about X" or "I know, that X..." - here you need "znać". "Nie znam tego człowieka".

Oh, "to prawda?" is rather not what you meant here. That means "Is that truth/Is that true", not "is that right".

[Wippii]

Jakie dziwne zdanie!

"Ten sok jest pomarańczowy... może to kawa. Kawa może być pomarańczowa, prawda?"

[Ann270528]

Where the heck is my dang coffee-juice?

[DanielCass950551]

Why can't I say "This is juice not coffee"

[Jellei]

Because it translates to "To jest sok, [a/] nie kawa".

Which is actually a more probable sentence to utter... but it's not what we have here in this exercise.

[AminaHamad]

exactly

[Larry11215]

so być takes the instrumental case even in the negative?

[alik1989]

Yes, only accusative turns to genitive when negated.