Saan is used for things not right now. Saan ka (where are you going)? Saan galing (where [are you] coming from)? Nasaan ka (where are you right now). Since Philippine languages don't have a copula "to be", many of their words where can take multiple aspects. Standard Cebuano marks where for all 3 "tenses". Diin, Hain, Asa. Standard Tagalog only marks for "present" and "non present".