As is typical of Bantu languages, Luna utilizes a noun-class system defined by prefixes.
[6] Ngu- is the first person singular subject prefix except before -di 'to be' (ndi 'I am') -bili 'to know' (mbili 'I know') and in the present tense progressive aspect of verbs, indicated by tana- (n-tana-nanga 'I am loving') and before object infixes.
In relative clauses, ta- replaces the negative prefix.
n-kw-a-nanga1SG.SUB-2SG.OBJ-PRES-loven-kw-a-nanga1SG.SUB-2SG.OBJ-PRES-loveI love youMa-laNP1.PL-towna-tw-aka-monaNP1.PL.REL-1PL.SUB-PST.PRF-seeMa-la a-tw-aka-monaNP1.PL-town NP1.PL.REL-1PL.SUB-PST.PRF-seeThe towns which we sawVarious tense, aspect, and mood (TAM) prefixes may be added to a verb to modify its meaning.
The prefix bi- indicates a meaning of 'so that, that, in order that' and the suffix -po 'please' 'is added to commands when addressing a superior.