der Professor
Plural: die Professoren
Nominativ
Akkusativ
Dativ
Genitiv
| Case | Definite | Indefinite | Plural |
|---|---|---|---|
| Nominativ | der Professor | ein Professor | die Professoren |
| Akkusativ | den Professor | einen Professor | die Professoren |
| Dativ | dem Professor | einem Professor | den Professoren |
| Genitiv | des Professors | eines Professors | der Professoren |
Nominative — the subject of the sentence: who or what is doing something.
der Professor · ein Professor
Accusative — the direct object (whom or what?), and always after für, durch, gegen, ohne and um.
den Professor · einen Professor · für den Professor
Dative — the indirect object (to or for whom?), and always after mit, nach, aus, zu, von and bei.
dem Professor · einem Professor · mit dem Professor
Genitive — possession (whose?), and after wegen, trotz and während.
des Professors · eines Professors · wegen des Professors
In the plural it is die Professoren in the nominative and accusative, den Professoren in the dative and der Professoren in the genitive. There is no indefinite article in the plural.
Der Professor beantwortet alle Fragen der Studenten.
The professor answers all the students' questions.
💡 Why der? “Professor” ends in -or, and nouns with this ending usually take der. Another example: der Motor