lekarza

lekarza

"Doctor" (accusative or genitive singular of "lekarz").

Here, 'lekarza' is in the Genitive case, used after the negation 'nie' with the verb 'znać'.

Nie znam tego lekarza.

I do not know this doctor.

Here, 'lekarza' is in the Genitive case, used because of the preposition 'do'.

Muszę iść do lekarza.

I need to go to the doctor.

Here, 'lekarza' is in the Accusative case, used as the direct object of the verb 'widzieć'.

Widzę lekarza na ulicy.

I see the doctor on the street.