This thesis concerns the documentation and description of the grammar of Tapo. Thespeaker call their language l' ap:> (Tapo). Tapo i spoken in Ethiopia and outh Sudanrnand is widely known in the literature as Upuuo. The sub-family it belongs to is Komanrn(Coman).rnThe textual data used for documentation has been collected with the aim of building arncorpus of the language. Different tasks of the community from daily activities tornfolktales and personal and community history narrations are recorded and archived.rnThe description of Tapo focuses on phonology, morphology and syntax of the language.rnThe phonology part has primarily focused on the segmental phonology. Tapo has a totalrnof 27 consonant phonemes articulated at bilabial, dental, alveolar, palatal, velar, andrnglottal places of articulations. All consonants occur in word initial position. Only wordmedialrnconsonant clusters are allowed in Tapo. These clusters consist of a nasal or arnlateral consonant that always assimilated in place of articulation to the followingrnconsonant, except to dentals. Tapo has a seven-vowel system with ATR distinctions onrnthe high vowels [+ATR] li,uJ and [-ATR] II, u/.rnTapo's nominal system has scant noun nominal categorization. The languagerndifferentiates between masculine, feminine and neutral singulatives and plurals in nouns.rnTapo has an agglutinative type of verbal system.!t is described based on pre and poststemrnsaffixation. Tapo's pre-stem contains bound subject pronouns, conditional, andrntense markers. On the other hand, post-stem suffixation incorporates benefactive, mood,rndirectionals and bound object pronouns.rnThe basic word order of Tapo is Agent-Verb-Object in transitive and ubject-Verb inrnintransitive verbs. Constituents are marked based on hierarchy. Object marking is basedrnon syntactical hierarchy of entities belonging to human, animal and inanimate. The mostrndominant hierarchy being human entities, as a beneficiary mostly placed following thernrnverb, followed by animates and lastly inanimate entities that would take secondaryrnobject position.