This thesis aims to document and investigate the morph-phonological and syntactic patterns of Applicative Constructions in Runyankore-Rukiga. The thesis consists of two parts. A research corpus composed of conversations and dialogues, hymns, excerpts from local newspaper, literary and linguist text, Interlinear Glosses examples excerpted from the linguistic literature and a collection of sentences based on introspection. This research corpus is accessible under the link: http://typecraft.org/tc2wiki/User:Misah_Natumanya My thesis explores the morph phonological processes that determine the realization of the applicative morpheme such as vowel harmony, palatalisation, epenthesis, deletion, metathesis, voicing and devoicing. These processes are explained, described and exemplified. In the syntactic section of my thesis, I classify applicative constructions according to the thematic role realized by the applied object. I discuss benefactive, instrumental, locative, circumstantial, possessive and temporal applicative constructions. For each of these constructions, we assess the primary object properties of the applied object, such as variation in object order, object marking and passivization. The thesis discusses also methodological questions related to field work, structuring of field work data and the creation of a research corpus.