In Arabic, the verb takes a signifcant place among the parts of speech. Without knowing the morphological features of Arabic verbs, it is impossible to maser many of the rules of other parts of speech. This article is devoted to auxiliary verbs, which, together with the main verb, convey additional meaning to the action of the subject. In Arabic, the topic of auxiliary verbs has attracted the attention of linguiss from the early Middle Ages to the present. The mos recent sudies on this topic are collected in the works of Abbas Hasan, Musafa Galayini, Fuad Nemat, Antoine Dahdakh, Abu Bakr Abdul Ali. In this article, the issue of the semantic classifcation of auxiliary verbs is scientifcally subsantiated. According to it, verbs are divided into such semantic groups as: “verbs of being and becoming”, “beginning verbs”, “verbs denoting the proximity of an action”, “verbs denoting the likelihood of an action” and others that assign the above meanings to the main verb. “ ”كان و أخواتهاare the mos commonly used among others, they perform the function of a linking verb and require the setting of a nominal predicate in the accusative case. And in verb sentences, together with the verb-predicate, they form a complex temporary consruction. The verbs أفعال الشروعrequire the subject in the nominative and the predicate in the accusative and denote the beginning of the action of semantic verbs. The predicate after the verbs أفعال المةاربةcan be a whole sentence. Also, the verbs أفعال المقاربةcan be both semantic and auxiliary. In Arabic, auxiliary verbs are verbs of a wide variety of uses in a sentence. They not only determine the degree and sate, but also the time of action. During the research, it became known that there is another type of auxiliary verbs that demonsrate excitement, desire and feelings