Datapoint Pichi/Negation and tense, aspect, and mood marking

The expression of perfect tense/aspect is asymmetrical. Affirmative and negative perfect are expressed by different forms.

Values

Different TAM marking in negated clauses

Example 19-91:
Eduardo dɔn chɔp.
Eduardo
Eduardo
dɔn
prf
chɔp.
eat
Eduardo has (already) eaten.
Example 19-92:
Pàpá, mi nɛa chɔp mi senwe.
Pàpá,
father
mi
1sg.emph
nɛa
neg.prf
chɔp
eat
mi
1sg.emph
senwe.
emph
Please, I myself haven't eaten (yet).

Source: Yakpo 2009: 348

Confidence:
Very certain