Wir warten "Auf den bus" or "auf dem bus"?
In Rosetta Stone it is "auf den".so it is accusative,but why it couldn't be "auf dem bus"? I found a sentence which says"ich gehe in den park" is it wrong to use "zum park" instead?
The verb "warten", when used as a transitive verb, has the fixed preposition "auf" and requires the accusative:
"Wir warten auf den Bus": We're waiting for the bus.
If no accusative is used, then "warten" will be interpreted as intransitive. The preposition "auf" becomes a local preposition:
"Wir warten auf dem Bus": We're waiting on top of the bus.
List oof verbs with fixed prepositions: https://www.deutschakademie.de/online-deutschkurs/forum/index.php?topic=86.0