Copulas
Copulas are used to form statements of identity, class membership, and attribution. Their syntax is COPULA SUBJECT - COPULA - COPULA COMPLEMENT. Copulas do not inflect for tense, evidentiality, person, or number.
aŋi
aŋi is used in place of the zero copula in more complex statements.
Ø
The zero copula is used in simple statements.