The present study compares the elements and main elements of the sentence (subject, predicate, and linking verbs) in Persian and Arabic languages to prove the hypothesis of many rhetorical similarities in the science of semantics of these two languages. Using a descriptive-analytical method, the researcher directly goes to the contents and expresses them, then concludes by analyzing these direct data. The main goal of the research is to answer the question of what is the main structure of the sentences and the position of the subject, and the predicate from the point of view of the semantics of Persian and Arabic languages. Further, it proved the hypothesis of the plurality of rhetorical commonalities. In general, what can be stated as the final and summary result of all the discussions in this paper is the correctness of the hypothesis of a large number of rhetorical correspondences in the discussed subject in Persian and Arabic languages; however, sometimes, differences are observed in the topics or existing materials. Also, in this research, the writer discusses issues such as article and indefinite article, addition, and omission, position and different forms of subject and predicate in Persian and Arabic languages, along with their commonalities and differences.
