Abstract: The study showed a phenomenon of Arabic grammar, which is the establishment of a grammatical function in the place of another, and the search was for what equivalent of the verb, so a group of linguistic elements took the place of the verb, and it is the name of the verb, sources, derivatives, pronouns, and these elements took the place of the verb in its significance to the event and time, the study dealt with the commonalities between these elements and the action that made them fit to take their place.