Die vier Fälle

German uses grammatical cases to show the role a noun plays in a sentence. Instead of relying solely on word order (as English does), German changes the article, pronoun, and sometimes the noun ending depending on whether the noun is the subject, direct object, indirect object, or possessor. There are four cases: Nominativ, Akkusativ, Dativ, and Genitiv.

Watch how the article changes as the same noun takes different grammatical roles.

The Nominativ marks the subject of a sentence — the person or thing that performs or experiences the action. To find the subject, ask: Wer macht das? Was passiert? (Who does that? What happens?). Every German sentence has exactly one subject in the Nominativ.

The Akkusativ marks the direct object — the person or thing that directly receives the action of the verb. Ask: Wen oder was? (Whom or what?). The critical change to remember: only the masculine article changes — der → den and ein → einen. Feminine, neuter, and plural forms are identical to Nominativ.

These prepositions always and only govern the Akkusativ case.

The Dativ marks the indirect object — the person or entity to whom or for whom the action is done. Ask: Wem? (To whom? / For whom?). Unlike the Akkusativ, all genders change their article in the Dativ. Plural nouns also add -n to the noun itself (if it doesn't already end in -n or -s).

These prepositions always and only govern the Dativ. A useful mnemonic for the core eight: aus, bei, mit, nach, seit, von, zu, gegenüber.

These verbs take a Dativ object, not an Akkusativ object. The person affected is always in Dativ. Many have no direct English equivalent — in English we say "I help him" (direct object), but in German helfen takes Dativ: Ich helfe ihm.

The Genitiv expresses possession, origin, or belonging. It answers the question Wessen? (Whose?). The Genitiv has two key features: the article changes (der → des/der) AND masculine and neuter nouns add -s or -es to the noun itself. Note: in modern spoken German, von + Dativ is increasingly used instead of Genitiv, but Genitiv remains essential for writing and formal speech.

Masculine and neuter nouns add -s (monosyllabic or ending in -s/-ß/-z/-x/-sch often add -es for ease of pronunciation). Feminine and plural nouns do not change.

A special group of masculine nouns — called "weak nouns" (schwache Maskulina) — add the ending -n or -en in every case except the Nominativ singular. They do not take the usual Genitiv -s. Most of these nouns refer to living beings (people, animals) or are loanwords ending in unstressed -e, -ent, -ant, -ist, -at, -ad, -ot.

German prepositions each govern a fixed case (or two cases). Knowing which case a preposition takes is essential — the wrong case can completely change the meaning. The trickiest group are the two-way prepositions (Wechselpräpositionen), which take Akkusativ for movement towards a destination and Dativ for location or static situations.

These nine prepositions take Akkusativ when expressing movement towards a place (ask: Wohin? — Where to?) and Dativ when expressing location or state (ask: Wo? — Where?).

Each pair shows the same preposition with the same noun. Notice how the article changes to signal movement or stillness.

These are the mistakes learners make most frequently when working with German cases. Each error is shown with a correction and explanation so you can recognise and avoid the same pitfall.

English word order conceals this distinction. In German, the masculine article must change to den/einen for direct objects.

All genders change in Dativ, including feminine (die → der) and neuter (das → dem).

Von always governs Dativ, never Nominativ.

In Dativ plural, the noun itself adds -n (unless it already ends in -n or -s).

The article alone does not create the Genitiv — masculine and neuter nouns also need the -s ending.

Weak masculine nouns like Kollege, Student, Mensch must have -en in Akk, Dat, and Gen.

Using Dativ when expressing movement (Wohin?) is a very common error.

Es gibt always takes the Akkusativ. No exceptions.