The heads of the first approximation (96).
- moodSpeechAct : Head
- moodEvaluative : Head
- moodEvidential : Head
- modEpistemic : Head
- tPast : Head
- tFuture : Head
- moodIrrealis : Head
- modRoot : Head
- aspHabitual : Head
- tAnterior : Head
- aspPerfect : Head
- aspRetrospective : Head
- aspDurative : Head
- aspProgressive : Head
- aspProspective : Head
- voice : Head
- aspCelerative : Head
- aspCompletive : Head
- aspRepetitive : Head
- aspIterative : Head
Derives DecidableEq, Fintype, Repr.
Used by level, Extends, instDecidableExtends, pairs, evidence, first, firstVariant, suffixOrder, toSecond, SecondOrders, instDecidableSecondOrders