How to Make a Locative Marker on a Verb

"I just want to throw out the idea and see what people thought about it. Sort of a way to shoot in one other, one other sort of argument that gets marked directly on the verb," he says. "It would make for some very interesting agreement morphology because obviously what I have for the the inflecting prepositions are these, you know, I have basically what starts out as the preposition plus a pronoun."