blutoonwithcarrotandnail wrote:If the accusative governs motion and the ablative governs location
then i guess it is just an exception that PRO SINE and SUB are
goverened by the ablative when expressing motion
sub uses the ablative when expressing location under and the accusative when expressing motion under.
as for pro and sine, which both take the ablative, they do not indicate motion.
pro literally means "to be in front of" and idiomatically means "for".
sine means "without" and so it has no sense of motion involved with it.
they may both be used in phrases that have motion involved, but the prepositions themselves do not indicate motion, unlike in, ad, sub.