Physical states as 'being sick' or 'ripe' are indicated by adjectives. The copula that introduces them may take the imperfective marker. It then yields a habitual meaning, as in Túnika di nhu pádri ta sta sénpri bránku álbu sima névi [robe of our priest IPFV be always white white as snow] 'The robe of our priest is always spotlessly white, as snow' (Lang 2002: s.v. álbu) or a future meaning, as in ..., na dos dia bu ta sta boa [in two day 2SG IPFV be well] ..., within two days you will be well' (Lang 2002: s.v. ifisiénsa), rather than an inchoative one.
Source: Lang 2002: s.v. bira