Abstract
The problem of compound verb and determining clear criteria for distinguishing this form of verb from verb phrase and simple verb has been a subject of hard debates among grammarians, especially over the last few years. While providing answers to some of the existing open questions about compound verbs, this paper focuses on analysis of the structure of this grammatical category from two aspects, semantic and morphological, and establishes a framework that offers a clear pattern for the analysis of this linguistic phenomenon based on the presented information. It is our belief that compound verb, like all compound words, is one of the linguistic phenomena playing a role in extension of semantic field in Persian language.