Transitive and Intransitive Verbs (and Valency) | German Grammar

Every German verb carries a hidden specification — its valency (die Valenz) — that tells you how many partners it needs and in what grammatical form. Some verbs demand a direct object in the accusative; some take none at all; some require a specific case like the dative; and some come welded to a fixed preposition. This frame is not predictable from meaning, and it doesn't transfer from English. It's part of the verb, just like its conjugation, and you learn it together with the word.

What "valency" means

Valency is borrowed from chemistry: just as an atom has a fixed number of bonds it can form, a verb has a fixed number and type of complements it requires. A verb's valency answers two questions:

How many partners does it need (zero, one, two)?
In what form — which case, or which preposition + case?

Valency	Frame	Example verb	Sentence
Transitive	accusative object	sehen	Ich sehe den Film.
Intransitive	no object	schlafen	Ich schlafe.
Dative verb	dative object	helfen	Ich helfe dem Mann.
Prepositional verb	fixed preposition + case	warten auf	Ich warte auf den Bus.

Transitive verbs take an accusative object

A transitive verb (transitives Verb) takes a direct object in the accusative. These are the verbs you can make passive, and they're the ones whose action passes onto a "thing affected."

Ich sehe den Film schon zum dritten Mal.

I'm watching the film for the third time already.

Sie kauft jeden Morgen eine Zeitung am Kiosk.

She buys a newspaper at the kiosk every morning.

Hast du meine Nachricht gelesen?

Did you read my message?

den Film, eine Zeitung, meine Nachricht — each is an accusative direct object. The accusative is the default case for whatever the verb acts upon.

Intransitive verbs take no object

An intransitive verb (intransitives Verb) is complete on its own — it needs no object to be a grammatical sentence.

Ich schlafe meistens sehr schlecht vor einer Prüfung.

I usually sleep very badly before an exam.

Das Baby weint schon die ganze Nacht.

The baby has been crying all night.

You can add adverbs, times, and places, but there's no accusative "thing" the verb is done to. Schlafen and weinen simply happen.

Dative verbs: the frame English doesn't have

Here's where English intuition fails hardest. A set of common German verbs takes a dative object instead of an accusative one. The dative noun is the only complement, yet it's not a direct object — it's grammatically more like the recipient or the party affected.

Kannst du mir bitte helfen? Ich finde den Schlüssel nicht.

Can you help me, please? I can't find the key. (helfen + dative: mir)

Das Kleid steht dir wirklich gut.

That dress really suits you. (stehen + dative: dir)

Ich danke Ihnen für Ihre Hilfe.

I thank you for your help. (formal; danken + dative: Ihnen)

In English, "help," "thank," and "suit" all take a plain object — "help me," "thank you." A learner naturally assumes the German equivalent does too, and produces the accusative. But helfen, danken, folgen, gefallen, gehören, antworten, and others all require the dative. There's no semantic rule that predicts this — it's a property of each verb you must memorise. The full list is on the dative verbs page.

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English transitivity does not transfer. helfen ("to help") looks transitive to an English speaker but is intransitive-dative in German: Ich helfe dir, never Ich helfe dich. Treat the required case as part of the verb's dictionary entry.

Prepositional verbs: a fixed preposition is part of the verb

Many verbs require not a bare-case object but a fixed preposition plus a case. The preposition is lexically tied to the verb and is usually not the literal translation of the English one.

Ich warte schon eine halbe Stunde auf den Bus.

I've been waiting half an hour for the bus. (warten auf + accusative)

Erinnerst du dich noch an unseren ersten Urlaub?

Do you still remember our first holiday? (sich erinnern an + accusative)

English "wait for" becomes warten auf (literally "wait on"); "remember" becomes sich erinnern an (literally "remember on"). You cannot derive these — they're memorised as units, and the deeper treatment is on verbs with fixed prepositions and verb government.

Valency drives the haben/sein choice

This is the connection most courses leave out, and it's the payoff of thinking in terms of valency. A verb's valency determines which auxiliary it uses in the Perfekt.

Transitive verbs (accusative object) → haben.
Most intransitive verbs → haben.
Intransitive verbs of motion (A→B) or change of state → sein.

Ich habe den ganzen Tag im Büro gearbeitet.

I worked in the office all day. (transitive/activity → haben)

Wir sind den ganzen Weg zu Fuß gegangen.

We walked the whole way on foot. (intransitive motion A→B → sein)

Das Eis ist in der Sonne geschmolzen.

The ice melted in the sun. (change of state → sein)

The logic: sein marks verbs where the subject moves to a new place or enters a new state — there's a before-and-after, a transition. Everything else, including all transitives, takes haben. So gehen (go somewhere), fahren (travel), kommen, fallen, einschlafen (fall asleep), aufwachen, sterben, and werden all take sein; arbeiten, schlafen, sehen, kaufen take haben. This is why valency, not meaning alone, is the organising idea — see Perfekt: haben vs sein.

The same verb can change frame

A single verb can be transitive in one use and intransitive in another — and the auxiliary follows. Fahren is the classic case:

Ich bin gestern nach Köln gefahren.

I travelled to Cologne yesterday. (intransitive motion → sein)

Ich habe meinen Bruder zum Bahnhof gefahren.

I drove my brother to the station. (transitive, with accusative object → haben)

When fahren has an accusative object (meinen Bruder), it's transitive and takes haben; when it just describes the subject travelling, it's intransitive-motion and takes sein. The frame, not the dictionary headword, decides.

Common Mistakes

❌ Ich helfe dich mit den Hausaufgaben.

Incorrect — helfen takes the dative, not the accusative.

✅ Ich helfe dir mit den Hausaufgaben.

I'll help you with the homework. (helfen + dative: dir)

Treating helfen as transitive (because "help" is in English) is the most common dative-verb error. The same trap hits danken dir, folgen dir, gefällt dir.

❌ Ich habe nach Hause gegangen.

Incorrect — gehen is a motion verb and takes sein in the Perfekt.

✅ Ich bin nach Hause gegangen.

I went home. (motion A→B → sein)

Defaulting every Perfekt to haben — exactly as English uses "have" for everything — produces this everywhere. Motion and change-of-state verbs need sein.

❌ Ich warte für den Bus.

Incorrect — warten requires auf + accusative, not the literal 'for.'

✅ Ich warte auf den Bus.

I'm waiting for the bus. (warten auf + accusative)

Transferring the English preposition (für for "for") instead of learning the German frame (auf) is endemic with prepositional verbs.

❌ Das Buch gehört mich.

Incorrect — gehören takes the dative.

✅ Das Buch gehört mir.

The book belongs to me. (gehören + dative: mir)

Key Takeaways

Valency is the frame a verb requires: how many complements and in what case or preposition. It's part of the verb, learned with it.
Transitive verbs take an accusative object; intransitive verbs take none; dative verbs (helfen, danken, gefallen) take a dative object that English would render as a plain object.
Many verbs require a fixed preposition + case (warten auf + Akk.), and the preposition rarely matches the English one.
Valency drives the auxiliary: transitives and most intransitives take haben; intransitives of motion or change of state take sein.
The same verb can switch frames (fahren: sein without an object, haben with one), so always check the actual sentence, not just the headword.

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