This thesis examines topics in the grammar of the Lele language, Manus Island, Papua New Guinea. Lele is spoken by ca. 4,500 people on mainland Manus Island and belongs to the little known Admiralties languages, a higher order subgroup of the Oceanic (Austronesian) language family. The methodology of language description followed the principles of the Basic Linguistic Theory (Dixon 2009a, b, 2012). The material that served as the basis of description was collected during long field stays particularly to Sapon village, from 2012 to 2014. The field research is based on the principle of immersion fieldwork, seeking a deeper understanding of both target language as well as culture through living with the language community and sharing everyday ...