The accusative is used with motion towards, and since aus conveys motion away from the car, I think the dative makes perfect sense
GandalftheBlack
joined 9 months ago
I think the key thing to mention about your accusative example is not that the car is part of the action, but rather that 'in' is describing motion towards/into something.
A jumper is a bad example, because it's not just made up of sleeves.
A bra is a much better example. But I was never making an argument that all things made up of two parts are referred to as a pair, just my thoughts on the rationale behind cases where we do.
I'd say it's less of a grammar rule and more about how things made up of two similar parts can be conceptualised
They're made up of two similar parts which form a pair, unlike a jumper
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Yeah, prepositions do complicate matters. The principle of motion towards vs. location/moment away from helps with those prepositions which can take both accusative and dative, but for other prepositions you do just have to learn.