(By Hedvig Skirgård): "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. ❡
There are instances where TAM can be expressed by a combination of an affix and auxiliary or particle. For example, some grammarians state that a mood is expressed by a certain form on the verbal root and an auxiliary. If this is a productive and obligatory way of expressing mood then such a construction triggers 1 for both this feature (GB312) and the features on free-standing mood marking (GB119 and/or GB519). If not all parts of the discontinuous marking are necessary for expressing a mood, then only consider the marking that is obligatory. ❡
While negation or interrogation can be considered grammatical moods, they are not covered by this feature."