This thesis is concerned with the tense, aspect and mood system of Kastanafiiia.rnKastanafiiia is an Ehtio-Semitic language. Kastanafiiia verbs employ variousrnconsonantal and vowel patterning to express the grammatical categories aspect andrnmood. Kastanafiiia verbs show a clear aspectual distinction between perfective andrnimperfective aspects. The variation is indicated by the morphological shape of the verbrnbases and agreement markers. In addition to aspect, Kastananna can distinguishrnbetween past and non-past tense. Tense, as a grammatical category, can only bernindicated in the perfect, in prospective aktionsart and in the imperfective aspect In thernperfective aspect there is no special marker for tense. In Kastananna, a perfect isrnformed by attaching the converb marker -m to a verb in the perfective aspectrnKastananna has a periphrastic construction which denotes specific temporal readingsrnof a situation. There are two morphologically recognized mood categories, namely thernimperative and the jussive. The imperative and jussive of triradical verbs have anrnidentical pattem However, affirmative imperative and jussive can be distinguished byrndifferent subject markers. Kastanafiiia, like the other Northern Gurage languages,rndistinguishes affirmative main-clause verbs in the indicative mood from subordinate,rnnegative and non-indicative verbs by means of morphological main verb markers. Thernmain verb markers encompass a set of suffixes, which are morphosyntacticrnconditioned.