| Nominative | Accusative | Dative | Genitive |
| No Article |
Schlüsselproblem |
Schlüsselproblem |
Schlüsselproblem/Schlüsselprobleme |
Schlüsselproblemes/Schlüsselproblems |
| |
| Definite Article |
das Schlüsselproblem |
das Schlüsselproblem |
dem Schlüsselproblem/Schlüsselprobleme |
des Schlüsselproblemes/Schlüsselproblems |
| |
| Indefinite Article |
ein Schlüsselproblem |
ein Schlüsselproblem |
einem Schlüsselproblem/Schlüsselprobleme |
eines Schlüsselproblemes/Schlüsselproblems |
| |
Plural
No Article |
Schlüsselprobleme |
Schlüsselprobleme |
Schlüsselproblemen |
Schlüsselprobleme |
| |
Plural
Definite Article |
die Schlüsselprobleme |
die Schlüsselprobleme |
den Schlüsselproblemen |
der Schlüsselprobleme |
