"This lady is not in our group."

Translation: Ta pani nie jest w naszej grupie.

[Alexander577428]

Is the noun phrase 'our group/naszej grupie' in dative or genitive, and why?

[VarHyid]

I think it's locative just like the sentence about the restaurant I replied to earlier :) Whenever something is IN something, it's locative, for example:

• in the bank = w banku
• in the park = w parku
• in the water = w wodzie
• in the garden = w ogrodzie
• in your head = w Twojej głowie
• in your dreams = w Twoich snach

[Alexander577428]

Thanks. You're an absolute life saver!

[C.Amaro1981]

After the preposition "w" can also be the accusative/ biernik case, example idę w góry, jadę w tatry i tak dalej

[C.Amaro1981]

Dokąd? To where? W+accusative
Gdzie?where? W+locative