This question is concerned with phonologically bound marking on the verb that indicates grammatical mood. Grammatical mood is concerned with (1) the relationship between an event/state/action expressed in a clause and its actualization in reality (e.g. realis or irrealis) and/or (2) the speaker’s attitude towards the actualization of this event/state/action. This feature covers all grammatical moods, including declarative. The mood marker may be polysemous with other markers.
While negation or interrogation can be considered grammatical moods, they are not covered by this feature.
Martuthunira (ISO 639-3: vma, Glottolog: mart1255)
Martuthunira has a suffix that denotes unrealized events, also known as irrealis. Martuthunira is coded as 1.
Ngawu, ngayu puni-lha nyina-lu ngurrinyu-tha, kurnta-yaangu Yes 1SG.NOM go-PST sit-PURP swag-LOC shame-IRR ‘Yes I went to sit on that swag, [I] ought to have felt shame.’ (Dench 1994: 151)
Bybee, Joan, Revere Perkins & William Pagliuca. 1994. The evolution of grammar. Chicago: University of Chicago Press.
Dahl, Östen. 1985. Tense and aspect systems. Oxford: Blackwell.
Palmer, Frank R. 2001. Mood and modality. Cambridge Univ. Press.
Narrog, Heiko. 2012. Modality, subjectivity, and semantic change: A cross-linguistic perspective. Oxford: Oxford University Press.
Dench, Alan. 1994. Martuthunira: A language of the Pilbara region of Western Australia. (Pacific Linguistics: Series C, 125.) Canberra: Research School of Pacific and Asian Studies, Australian National University.