navi1-5  Exercise 3: Decoding Verb Forms
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  t<ìrm>aron   tense: near past     aspect: imperfective   "was just hunting"
  l<ol>u       tense: general       aspect: perfective     "was"
  t<ay>aron    tense: future        aspect: plain          "will hunt"

Why Oel ngati kameie looks as if it has no tense infix
  The verb kameie has no infix in position 1 (the second-to-last syllable),
  so the tense is the general one, taken from the context. The only infix in
  it is ei, in position 2 (the last syllable): kam<ei>e.

What ei does
  ei is an attitude infix: it shows the speaker's positive feeling about the
  action. That is part of why the greeting feels warm and deep (Chapter 6
  covers the attitude infixes).