1. Introduction This article is an attempt to illustrate a comprehensive functional-typological study of two perfect constructions in modern Persian. In regard to these forms, there has been a kind of intricate complexity and difficulty that have occupied the minds of the grammarians and linguists. Regarding the complexity of the perfect constructions, what can be seen is the consistency and heterogeneity of these constructions with the past, on the one hand, and with the present, on the other hand, as well as the characteristics of tense and aspect, and their functions with adverb expressions. In addition, since the nature of the sentences are not directly determined by grammatical tenses, the various features of textual, linguistic, and meta-linguistic features play a great role in this regard. Accordingly, the motivation for writing this essay is to provide an explanation of the various aspects and functions of the present perfect and present perfect progressive in the contemporary Persian language, especially since their uses are widespread in their entirety compared with other perfect structures so that we can assume present perfect "the prototype" of these constructions. Therefore, we provide an explanation of these two perfect constructions, whose common elements are the past stem of the main verb plus the perfect aspect morpheme – e-, or the so-called “ past participle. Also, the amalgamation of present perfect with the past tense, and its relation with definity, on then one hand, and the behavior of temporal adverbs towards the limitation of the perfect uses, along with aspectual and temporal nature of this construction and other perfect constructions as well as their relationship with the category of evidentiality on the other hand, have made this research more impressive. . .