Within the Minimalist Program (MP), Relative clauses (RCs) are considered complementizer clauses (CPs) containing a C with an edge feature [EF] in the form of [wh] and [EPP] but no tense feature. This study investigates Persian RC derivation based on MP. By proposing two approaches, namely: (1) ‘ ke -movement’ and (2) ‘null wh-operator (OP) movement’, we will consistently argue and show that the null wh-OP approach provides an appropriate generalization for Persian restrictive RCs. Adopting the latter, the results display Persian RCs can be analyzed as CPs with a null wh-OP assuming to undertake wh-movement as copying and deletion from different syntactic positions, i.e., subject, direct object, object of preposition, etc. This operator allows a small pro in the subject position, leaving an optional null copy, either allowing an optional resumptive pronoun (RP) behind in direct object position or attaching to the verb; and obligatorily in indirect object and object of preposition positions as well as Ezafe-construction. Also, the edge feature of the probe, the complementizer ke , attracts the null wh-OP to Spec-C, for checking and valuing the unvalued [wh] and [EPP] features. The long relative clause derivations can, correspondingly, work as expected by the successive cyclic movement of OP through intermediate Spec-C positions as well.
