This article presents a comprehensive description of the Khaling intransitive and transitive verbal paradigms, focusing on the complex system of stem alternations , which is unmatched in the Sino-Tibetan family. Using internal reconstruction , we posit a reconstructed root and a set of rules from which all attested alternations can be derived. Paradigms generated by a computerized version of these rules have been validated by several speakers. This reconstruction serves as a tool to efficiently classify and describe morphophonological alternations, and as a basis for further research on diachronic morphology involving comparison with other closely related languages such as Dumi and Koyi.