Almighty is learning and teaching, including looking at its language and its structures. It gives us an important aspect in knowing the style of the Holy Quran, and understanding its structures in a distinct way, and the study reveals the highlighting of the knowledge of these distinguished scholars, and the work of the infinitive is one of the topics that were not satiated with study as far as we know, so the title was: (The difference in the work of the infinitive in the adverb and the prepositional phrase in the Holy Quran ). The importance of the research lies in giving a clear image of the dispute in his work from esteemed scholars, as well as shedding light on this topic and showing its axes to be the nucleus of another research project