German Prepositions: Fixed Cases and the In/Into Distinction
German prepositions usually require a particular case, while nine common two-way prepositions switch between accusative and dative in spatial uses. Mit takes dative and für takes accusative regardless of movement. With in, auf and similar two-way prepositions, distinguish destination from location. Learn prepositions in short phrases, including contractions such as im, ins, zum and zur.
Published 25 September 2026 · Updated 13 October 2026
Mit dem Bus means by bus. Für den Bus means for the bus. The noun has not changed gender; a different preposition asks for a different case. Memorising the preposition without its case leaves half the phrase unfinished.
Start with fixed-case phrases
Preposition
Case
Useful example
mit — with
Dative
mit dem Zug — by train
aus — from / out of
Dative
aus der Stadt — from the city
bei — at / with
Dative
bei meiner Freundin — at my female friend’s place
zu — to
Dative
zum Bahnhof — to the station
für — for
Accusative
für den Kurs — for the course
ohne — without
Accusative
ohne einen Plan — without a plan
durch — through
Accusative
durch den Park — through the park
Other common dative prepositions include nach, von and seit; common accusative ones include gegen and um. Treat this as a starter set, not a claim that the language has only these prepositions. Genitive prepositions and fixed idioms add further patterns.
The nine two-way prepositions
An, auf, hinter, in, neben, über, unter, vor, zwischen can take accusative or dative for different spatial relationships. With location, use dative: Das Buch liegt auf dem Tisch — The book is on the table. With placement towards a destination, use accusative: Ich lege das Buch auf den Tisch — I put the book onto the table.
The contrast is not simply motion. Ich laufe im Park describes running within the park, so it is dative. Ich gehe in den Park describes entering the park, so it is accusative. Meanwhile Ich gehe zum Park still uses dative because zu is a fixed-case preposition.
Contractions reveal an article
Im = in dem; ins = in das; am = an dem; zum = zu dem; zur = zu der; beim = bei dem; vom = von dem. These are ordinary written and spoken combinations. Im often marks location; ins often marks entry or destination.
Learn zu Hause — at home — and nach Hause — homewards — as fixed expressions. They are not instructions to attach zu or nach freely to every place name. Nach Berlin works for a city; in die Schweiz uses an article-bearing country name.
Time and verb combinations need their own examples
Am Montag means on Monday; um neun Uhr means at nine o’clock; seit Montag means since Monday. Spatial pictures cannot explain every time expression.
Likewise, warten auf + accusative means wait for and sprechen mit + dative means speak with. Learn Ich warte auf den Zug as a full phrase. Translating English for into German für would give you the wrong construction.
Choose with a reason
Complete mit ___ Zug, für ___ Kurs and Das Buch liegt auf ___ Tisch. Answers: dem, den, dem. Mit requires dative; für requires accusative; auf expresses location in the final sentence. Three checks are more reliable than one vague rule about movement.