The Adûnaic subjunctive mood was represented by an auxiliary (SD/439). In most European languages, the subjunctive mood is for an imagined or hypothetical situation: “I would go to town, if you went with me”. Most authors have suggested that the particle du forms subjunctive in the sentence azrîya du-phursâ akhâsada “that the seas should gush into the chasm” (VSH/25, AL/Adûnaic, LGtAG), but I think this sentence might be in the optative mood instead.