There are two copulas: ê and sta. In analogy to the condition in the Ibero-Romance languages ê is used for classifications and sta in cases where one element is situated with regard to another or where a momentary feature or role is expressed. Occasionally (e.g. in exclamations), predicative adjectives occur without a copula, e.g. Désdi kel dia, kábu konpo, sábi djondjo: bariga fártu, amor ê txeu! 'Since that day the situation has improved, the pleasant things have come back: if the stomach is full, love is big’. (Lang 2002: s.v. djondjo).
Source: Brüser et al. 2002: s.v. bitirába
Source: da Silva 1987: 41