Persian attributive constructions are sentences including liking verbs:astan, budan, šodan, gaštan, gardidan.Considering some typological, syntactic, semantic, logical evidences and an evidence relying on first language acquisition process, the linking verbs do not play any canonical role in assigning the vabency of the construction. But, the contentives- nouns, adjectives and prepositional phrases preceding the linking verbs are considered as the pedicates.The writer of this paper believes that the attributive construction consists of one argument, so the valency of its predicate should be one. Finally, they are derived under predicate phrase node.Consequently, these kinds of predicates assign agentive or patientive q- role rather than essive to their arguments.