German Cases: Ontology and Knowledge Base
This section provides a structured, encyclopedic reference for German grammatical cases. Here you will find comprehensive glossaries, taxonomies, decision trees, and classification systems designed to organize and clarify all aspects of German case grammar.
Terminology Glossary
Core Case Terms
Kasus (Case)
A grammatical category that indicates the syntactic function of a noun, pronoun, or noun phrase in a sentence. German has four cases: nominative, accusative, dative, and genitive.
Nominativ (Nominative Case)
The case of the subject; the noun performing the action of the verb. Also called the Werfall ("who-case") because it answers the question "Wer?" (Who?).
Akkusativ (Accusative Case)
The case of the direct object; the noun receiving the action of the verb. Also called the Wenfall ("whom-case") because it answers the question "Wen oder was?" (Whom or what?).
Dativ (Dative Case)
The case of the indirect object; the noun indirectly affected by or benefiting from the action. Also called the Wemfall ("to-whom-case") because it answers the question "Wem?" (To whom?).
Genitiv (Genitive Case)
The case indicating possession, ownership, or close association. Also called the Wesfall ("whose-case") because it answers the question "Wessen?" (Whose?).
Declension Terms
Deklination (Declension)
The inflection (change in form) of nouns, pronouns, adjectives, and articles to indicate case, number, and gender. German declension follows specific patterns based on these grammatical features.
Artikel (Article)
A word that accompanies nouns and indicates definiteness (definite article: der/die/das) or indefiniteness (indefinite article: ein/eine/ein). Articles decline to show case, number, and gender.
Bestimmter Artikel (Definite Article)
The German equivalent of "the": der (masculine), die (feminine), das (neuter), die (plural all genders).
Unbestimmter Artikel (Indefinite Article)
The German equivalent of "a/an": ein (masculine), eine (feminine), ein (neuter). Has no plural form.
Negativartikel (Negative Article)
Kein/keine/kein, used to negate nouns ("no," "not any," "none"). Declines like the indefinite article.
Adjektiv (Adjective)
A word that modifies or describes a noun. German adjectives decline to match the case, number, and gender of the noun they modify.
Starker Deklination (Strong Declension)
Adjective declension pattern used when no article precedes the adjective. The adjective itself carries the full case/gender/number marking.
Schwacher Deklination (Weak Declension)
Adjective declension pattern used after definite articles. The adjective has minimal endings because the article already indicates case.
Gemischte Deklination (Mixed Declension)
Adjective declension pattern used after indefinite articles and possessive determiners. Combines features of strong and weak declension.
Noun Classification Terms
Substantiv / Nomen (Noun)
A word that represents a person, place, thing, or concept. In German, all nouns are capitalized.
Genus (Gender)
The grammatical classification of nouns as masculine, feminine, or neuter. Unlike biological gender, grammatical gender is arbitrary and must be memorized with each noun.
Maskulin (Masculine)
One of the three German genders. Typically includes male beings, days, months, seasons, most weather phenomena, and many other nouns with no semantic connection to maleness.
Feminin (Feminine)
One of the three German genders. Typically includes female beings, rivers, flowers, and many other nouns with no semantic connection to femaleness.
Neutrum (Neuter)
One of the three German genders. Typically includes young creatures, infinitives used as nouns, metals, chemical elements, and many abstract concepts.
N-Deklination (Weak Noun Declension)
A special declension pattern followed by certain masculine nouns (mostly animate beings) that add -(e)n in all cases except nominative singular.
Preposition Terms
Präposition (Preposition)
A word that governs a noun phrase and indicates spatial, temporal, or logical relationships. German prepositions require specific cases for their objects.
Akkusativpräposition (Accusative Preposition)
A preposition that always requires the accusative case: durch, für, gegen, ohne, um, wider.
Dativpräposition (Dative Preposition)
A preposition that always requires the dative case: aus, außer, bei, mit, nach, seit, von, zu, gegenüber.
Genitivpräposition (Genitive Preposition)
A preposition that requires the genitive case: wegen, trotz, während, aufgrund, statt/anstatt, innerhalb, außerhalb.
Wechselpräposition (Two-Way Preposition)
A preposition that takes the accusative when indicating motion toward a destination and the dative when indicating location/position: an, auf, hinter, in, neben, über, unter, vor, zwischen.
Wo vs. Wohin
The distinction between location (Wo? = where, taking dative) and direction/motion (Wohin? = where to, taking accusative) that governs case choice with two-way prepositions.
Case Identification Decision Tree
Follow this decision process to determine which case a noun should take:
Step 1: Is the noun the subject of the sentence?
- YES → Use NOMINATIVE
- NO → Continue to Step 2
Step 2: Is there a preposition before the noun?
- YES → Determine which case the preposition requires:
- durch, für, gegen, ohne, um → ACCUSATIVE
- aus, außer, bei, mit, nach, seit, von, zu, gegenüber → DATIVE
- wegen, trotz, während, aufgrund, statt → GENITIVE (or dative in speech)
- an, auf, hinter, in, neben, über, unter, vor, zwischen → Continue to Step 3
- NO → Continue to Step 4
Step 3: Two-way preposition—Motion or Location?
- Motion toward destination (Wohin?) → ACCUSATIVE
- Location/position (Wo?) → DATIVE
Step 4: Is there a verb governing the case?
- Dative verb (helfen, danken, antworten, gefallen, gehören, etc.) → DATIVE
- Genitive verb (bedürfen, gedenken—archaic/formal) → GENITIVE
- Standard transitive verb → Continue to Step 5
Step 5: Is the noun receiving the action directly?
- YES (direct object) → ACCUSATIVE
- NO, but indirectly affected (indirect object) → DATIVE
- NO, showing possession → GENITIVE
Verb Classification by Case Government
Verbs Requiring Dative Objects
| Verb | Meaning | Example |
|---|---|---|
| antworten | to answer | Ich antworte ihm. |
| danken | to thank | Ich danke dir. |
| fehlen | to be missing | Du fehlst mir. |
| folgen | to follow | Ich folge ihm. |
| gefallen | to please | Das gefällt mir. |
| gehören | to belong | Das gehört mir. |
| glauben | to believe | Ich glaube ihm. |
| helfen | to help | Ich helfe ihr. |
| nutzen/nützen | to be useful | Das nutzt mir. |
| passen | to fit | Es passt mir. |
| schmecken | to taste good | Es schmeckt ihm. |
| vertrauen | to trust | Ich vertraue dir. |
| weh tun | to hurt | Das tut mir weh. |
Verbs Taking Dative + Accusative (Double Objects)
These verbs take a person in the dative and a thing in the accusative:
- bringen (to bring) — Ich bringe ihm (D) das Buch (A).
- geben (to give) — Ich gebe dir (D) den Schlüssel (A).
- kaufen (to buy) — Ich kaufe ihr (D) Blumen (A).
- sagen (to say/tell) — Ich sage ihm (D) die Wahrheit (A).
- schicken (to send) — Ich schicke dir (D) eine E-Mail (A).
- schreiben (to write) — Ich schreibe ihm (D) einen Brief (A).
- zeigen (to show) — Ich zeige ihr (D) das Foto (A).
Preposition Taxonomy
Spatial Prepositions
Location (Wo? - Dative)
- an (at, on vertical)
- auf (on horizontal)
- in (in, inside)
- neben (next to)
- unter (under)
- vor (in front of)
- hinter (behind)
- zwischen (between)
- über (above)
- bei (at, near)
Direction (Wohin? - Accusative)
- in (into)
- auf (onto)
- an (to, up to)
- unter (under)
- über (over, across)
- durch (through)
- gegen (against)
- um (around)
- zu (to)
- nach (to [cities/countries])
- auf... zu (toward)
Temporal Prepositions
Time Points (Accusative)
- um (at [clock time]) — um 3 Uhr
- für (for [duration]) — für drei Tage
- gegen (around [time]) — gegen Mittag
Time Periods (Dative)
- in (in [months, years, seasons]) — im Sommer
- an (on [days]) — am Montag
- vor (ago) — vor einem Jahr
- nach (after) — nach dem Essen
- während (during) — während des Films
- seit (since, for) — seit einem Jahr
- zu (at [holidays]) — zu Weihnachten
- bei (at [events]) — bei der Hochzeit
Pronoun Case Reference
| Person | Nominative | Accusative | Dative | Genitive* |
|---|---|---|---|---|
| 1st singular | ich | mich | mir | meiner |
| 2nd singular (informal) | du | dich | dir | deiner |
| 3rd singular m. | er | ihn | ihm | seiner |
| 3rd singular f. | sie | sie | ihr | ihrer |
| 3rd singular n. | es | es | ihm | seiner |
| 1st plural | wir | uns | uns | unser |
| 2nd plural (informal) | ihr | euch | euch | euer |
| 2nd (formal) | Sie | Sie | Ihnen | Ihrer |
| 3rd plural | sie | sie | ihnen | ihrer |
*Genitive pronouns are archaic/literary; possessive determiners are used instead in modern German.
Common Case Confusions
Dative vs. Accusative with Two-Way Prepositions
Accusative (Motion)
- Ich gehe in den Park. (I'm going into the park.)
- Er legt das Buch auf den Tisch. (He puts the book on the table.)
- Sie stellt die Vase an das Fenster. (She puts the vase by the window.)
Dative (Location)
- Ich bin im Park. (I'm in the park.)
- Das Buch liegt auf dem Tisch. (The book is on the table.)
- Die Vase steht am Fenster. (The vase is by the window.)
Dative vs. Accusative with Verbs
Some verbs that take dative objects surprise English speakers:
| German (Dative) | English Equivalent |
|---|---|
| Ich helfe ihm. | I help him. (direct object in English) |
| Ich danke dir. | I thank you. (direct object in English) |
| Ich antworte ihm. | I answer him. (direct object in English) |
| Ich folge ihr. | I follow her. (direct object in English) |
| Es gefällt mir. | I like it. (subject-verb inversion) |
| Es tut mir leid. | I'm sorry. (idiomatic) |
Quick Reference: Case Endings
Definite Article Pattern
- -r endings: Nominative masculine, dative feminine, genitive feminine/plural
- -e endings: Nominative/accusative feminine, nominative/accusative plural
- -s/-es endings: Accusative neuter, genitive masculine/neuter
- -m endings: Dative masculine/neuter
- -n endings: Accusative masculine, dative plural
Memory Aid: DER-words and EIN-words
DER-words (der, die, das, dies-, jed-, jen-, manch-, solch-, welch-, all-) follow the definite article declension pattern.
EIN-words (ein, kein, possessives: mein, dein, sein, ihr, unser, euer, Ihr) follow the indefinite article declension pattern.
This ontological reference serves as a comprehensive knowledge base for all aspects of German cases. For practical applications and exercises, proceed to our Tools & Resources section. For guidance on overcoming common difficulties, see Challenges & Solutions.