Pronominal Auxiliary verb in Persian language

There is a certain auxiliary verb in Persian language that always associated with a pronoun. These verbs are used today in Impersonal forms probably. These verbs are less known and their recognition helps to Persian language’s recognition. This research tries to introduce auxiliary verb from the perspective of Grammarians and introduce a certain pronominal auxiliary verb in Persian language. Although the definitions of the verb are often similar, but as is clear, naming of this verb itself, is disputed and there is no difference between the auxiliary verb and its different types. This paper studies the Features, Functions and hosts of this verb whit a historical view.