Investigation of İsamüdîn El-İsferyînî's work titled ʿİṣam ʿAle'l-cami in terms of nahiv (syntax) and methodology

Since the early periods of Islam, Muslim scholars have attached great importance to Arabic, the language of the Qur'an, and have always aimed to carry it forward. As a result, many linguists have been trained in every period throughout the history of Islam. They have beeen recorded to history of Arabic language by copyrighting many valuable works. On this occasion, they made great contributions to the development of Arabic. ' İsâmüddîn el- İsferâyînî is one of those linguists who became famous for his studies in the field of language. In our study, we examined Isferâyînî's Nahiv (syntax) work and his method in his work ʿİṣâm ʿale'l-Câmî. In this context, we planned our study as an introduction and two following parts. In the introduction, we have included information such as the subject and purpose of the thesis, the method followed in the thesis and the sources of the thesis. In the first part, after contacting Isferâyînî's life, scientific personality and nahvi aspect, we mentioned the importance of him and his work named ʿİṣâm ʿale'l-Câmî in the science of Nahiv (syntax). In the second part, we tried to specify the method of İsferâyînî in the mentioned work. In this context, we tried to explain his way of explaining statements, his style of handling controversial issues and his method of criticism with examples. KeyWords: 'İsâmüddîn el-İsferâyînî , ʿİṣâm ʿale'l-Câmî, Nahiv, Method.