No tense affixation, only aspect. Perfect, habitual, progressive.
The majority of aspect markers occur after the main verb, however, two auxiliaries, "flet" - be about to - and "ach" - may; might - occur before the main verb.
different stem vowels
Tenses are distinguished by tones, aspects and moods are prefixes
For past and future tenses, two strategies are used at the same time.
