The Arabic language is characterized by the characterization of the words in the motions among the other languages, and a single of (Al Harka Al erabia) has a value of the grammar in the completion of grammatical functions as it can show more than one grammatical function in the same word, as in the ( Mansubat ) of names, it can change the meaning in the grammatical loads, including some elements of the composition of the carrier of more than one function , and we can call this phenomenon the term (Duality of Function), and the Prophet's Hadith in this research field to apply, analyzing the nominal elements installed in its structures, including names that have more than one function in order to obtain more than one load of a single component according to the functional diversity of this element through this grammatical use, and the duplication includes between (AL Haal and object , Al Haal and tammez , Al Haal and Maful Al Mutlaqq , object and Al Tammez , object and Al mafuul Al Mutlaqq, object and tempetation between Badl and Tawkeed ).).