I've been revisiting Loglan (thru Steve Rice's book) and I'm agonizing again.
Already adopted are the dual natures of pa-na-fa, as pa-do-fu
That is, they're both tense markers and prepositions:
go pa kom. I ate.
pa fudey, go kom. Before tomorrow, I will eat.
Well and good. Seems to work okay.
Do I need to do the same thing with here-near-far (vi va vu)
Right now, Ceqli has a different type of tripartite position words,
as in Japanese and Spanish:
ci - here
ca - there by you
cu - yonder