In this world each and all languages are based on noun and verb. Without the naming and action words we cannot frame even a single sentence. In the same way, Tamil Language also depend on noun and verb. Verb is an important component of language. Tamil grammarians and linguists classify and interpret the types of verbs in different ways. Among the classifications, one of them is a negative verb. Changes are taken within the language system. The continuous change will be occurred in the language system and it process over time to time. Languages that are subject to change are likely to survive. Thus, the structure of modern Tamil negative verbs is entirely different from the system of ancient Tamil negative verbs in Tamil. This article focuses these differences through morphologically with one of the linguistic subdivisions. It also describes the development and growth of negative verb morphological elements and the places where we use it.