The effect of the grammatical errors of the middle lakhvash on the advanced ones of the Kufa school

This research aims to talk about the grammatical Cause from the point of view of Al Akhfash, the middle, and highlighting the features of its renewal and development that scholars did not shed light on, as they did with his Former and subsequent, during the second century AH. Then the research for those who came after the middle Akhfash from his students and were affected by him, from the advanced of this Kufic doctrine who lived with him, or came after him, and took from him, and other scholars of this art, due to the reliance of many of them on the views of the Akhfash and his grammatical Causes in controlling their differences with the grammarians of Basra. The accounts go on to confirm to us the link between the scholars of Kufic doctrine and Al Akhfash, their love to him, and the awareness of his opinions and his Causes, especially Al Kisaei and Al Farraa who applied his approach in writing two books of the same name (The Meanings Of The Qur’an), then the strong interest of Al Kisaei for reading Sibawaih’s book in front of him, (Al Akhfash), not Once, but twice; Because he knows with certainty that he, Al Akhfash, is a great scholar, and that he is the path leading to understanding and explaining that book.This research dealt with many of the Causes of Al Akhfash that he had clear renewal manifestations in it, and that made the ancestors of Al Kufa doctrine walk behind him and trace his paths influenced by those Causes. Among the most notable were the Causes that depend on hearing, and there are other separate Causes that will be observed through research.