[rvense]

If we described tense as something like the grammaticalization of the temporal relationship between the state of affairs described in the utterance and the time of the utterance itself, then it is my understanding that this isn't really a meaningful category in e.g. Sino-Tibetan or Austronesian languages. You can specify "today" or "tomorrow", but most sentences will be ambigous as far as time goes.

(I'm also slightly confused by your suggestion that English does not have tense outside of auxilliary verbs? "He goes" vs. "He went"?)