Case Triggers: Verbs and Genitive

Not every gap has a preposition to its left. When there is none, two other triggers take over: the verb itself, which for a small group of verbs demands the dative instead of the usual accusative, and the genitive, which expresses possession and brings its own ending on the noun.

This article shows you both triggers and closes with a checklist that ties all four case triggers from this article series into a single routine. You still get the forms themselves from Case Reference: the Article Tables.

Quick rule: No preposition signal? Then the verb (dative verbs!) or a possession relationship (genitive: des + -s/-es) decides the case.

The verb decides: dative verbs and accusative objects

When no preposition is in the way, the verb decides the case of the object. The default is the accusative: the vast majority of verbs take an accusative object (ich sehe den Mann, sie kauft die Tasche). But a small and very exam-relevant group demands the dative. You have to know these verbs by heart, because the dative is not visible from the verb form itself.

Memory hook: helfen, danken, gehören, gefallen, antworten, gratulieren all revolve around interpersonal exchange rather than acting on someone. Picture yourself handing the person something with an open palm, help, thanks, a compliment, congratulations, rather than pushing at them: the hand reaches toward the person but never lands squarely on them. For this group of common exchange verbs, the person is a receiver, not a target the way an accusative object is, which is why the dative shows up.

See one of these verbs followed by a gap with no preposition, and the case is dative, with no mit or zu needed. Set the dative endings:

Did you feel it? You didn't guess those endings, you recognized them from the verb itself, since helfen, gehören, and danken demand the dative with no preposition in sight, purely because they are dative verbs.

For contrast, the default case, the accusative object. Here only the masculine changes (der → den); neuter and feminine stay as in the nominative:

Genitive on the noun (-s or -es)

The genitive expresses possession or belonging (die Farbe des Autos) and is often signalled by des or der to the left. For masculine and neuter nouns, the noun itself also takes an ending, and that ending is exactly what the C-test gap tends to hide.

In short: where -es is easier to pronounce, use -es; otherwise plain -s is enough. Feminine nouns and plurals stay unchanged in the genitive. Set the noun ending:

Weak Masculine Nouns (n-Declension)

A small, closed group of masculine nouns behaves differently from every other noun: they take -(e)n in every case except the nominative singular, including the accusative, where normally only the article changes (den Mann, but den Studenten). Grammarians call this group the n-declension; "weak masculine nouns" is the everyday name.

Two subgroups belong here. First, masculine nouns for people or animals that already end in -e in the nominative: der Junge, der Kollege, der Kunde, der Experte. Second, a small list you have to memorize without the -e: der Student, der Herr, der Mensch, der Nachbar, der Präsident. Both subgroups take the same ending; only the exact form differs slightly.

Student ends in a consonant and takes the full -en (Studenten). Kollege already ends in -e and only needs -n (Kollegen). In the plural all four cases are identical anyway; the noun itself stops changing, only the article does.

The genitive singular is the exception to the exception here: it does not take an extra -s the way strong masculine nouns do (des Mannes), only the same -(e)n as the accusative and dative: des Studenten, never des Studentens.

der Herr breaks the pattern one more time: in the singular it takes only a single -n (den/dem/des Herrn, not Herren), but in the plural it takes -en (die/der/den Herren).

Set the endings:

The quick case checklist

At every ending gap, work through these seven questions from top to bottom. The first one that applies gives you the case; the last one checks an additional noun ending within that case:

The first three questions all revolve around prepositions. You already know the fixed and two-way prepositions from:

Case Triggers: Prepositions

The second question, the fixed verb-plus-preposition pairing (warten auf, sich freuen über), is its own topic with a long list:

Prepositions & Valency: Verbs with a Fixed Preposition

Boss gap

Now put it all together, gap by gap with the checklist. Telling three triggers apart inside one sentence is the toughest ask in this article: bei hands you the dative on the spot, warten auf clings to its fixed accusative, and trotz on top of that demands the genitive ending on the noun.

Common mistakes

Treating a dative verb as accusative. Ich helfe den Mann is wrong. helfen demands the dative: Ich helfe dem Mann. Learn the short list of dative verbs, because the dative is not audible in the verb.

Forgetting the genitive ending on the noun. des Vater is incomplete. Masculine and neuter need the extra -s or -es in the genitive: des Vaters, des Kindes.

Dative plural without -n on the noun. After den in the dative plural, the noun also takes an -n unless it already ends in -n or -s: mit den Kindern, mit den Freunden.

Worth remembering

• Without a preposition, the verb decides: most verbs take the accusative, a small group of dative verbs (helfen, danken, folgen, gehören, gefallen ...) demands the dative.
• Genitive on masculine and neuter also means an extra -s or -es on the noun; feminine and plural stay unchanged.
• Weak masculine nouns (n-declension: Student, Herr, Mensch, Kollege ...) take -(e)n in every case except the nominative singular, including the genitive, but there without an extra -s.
• The case checklist ties all four triggers into one routine: fixed preposition, fixed verb-preposition pairing, two-way preposition, dative verb, normal object, genitive, plus the extra check for weak masculine nouns.
• The endings themselves come from the two article tables in Case Reference: the Article Tables, the preposition triggers live in Case Triggers: Prepositions.

Inflectional endings like these make up roughly a fifth of all C-test gaps overall, and dative verbs plus the genitive ending are only a smaller slice within that category. The checklist above is your tool now: run it in practice drills until it fires automatically.