This paper aims to examine the present and past tense-aspect constructions in Jish Arabic, an undocumented Arabic variety of Upper Galilee (Israel), and delineate their morphological, syntactic, and semantic features. Nine such constructions are identified, and the structure of each construction is discussed. In addition, using the Natural Semantic Metalanguage approach (NSM), an explication (a definition using simple words) of the meaning of each construction is presented. In discussing the Jish Arabic constructions, a comparison is made with their English counterparts, which are chosen as a familiar point of reference. The comparison with English does not make the explications prone to Anglocentrism, as the explications are built via a simple, universal language. This language ensures their translatability into Jish Arabic and their verification by native Jish Arabic speakers. In addition, it makes their meanings accessible to non-specialists, as the explications can be translated into any language. This study can be seen as a contribution to the field of theoretical linguistics, particularly descriptive linguistics, as it documents the tense-aspect constructions of an undocumented variety. In addition, it can be seen as a contribution to the field of applied linguistics, especially as it compares these constructions to their English counterparts. It is hoped that this paper will stimulate the investigation of tense-aspect constructions in other non-standard Arabic varieties, most of which are undocumented.