Abstract:
The men of eloquence divide the word in respect of capebility of truth and mendacity to report and composition.on the conterary of compositional sentence ,report sentence is not truthful and mendacious. It consists five types of imperative,interdictional,interrogational,supplicational and vocative.some compositional sentences have secondary purpose.Asra,the seventeenth sureh of Holy Quran with 111 verses is Quran Meccan sureh.this sureh in respect of function and variety of efficieny of compositional sentences is noticeable.And about 50 sentences of it is compositional with various purposes.comperative compositional sentences have the most function with the efficieny of 13cases. The other functions of compositional sentences efficiently are :12 cases interdictional with seven function.Interrogational:5 cases with four functions.and vocative : 4 cases with 3 functions.the noticeable point is that,all the compositional sentences of Asra sureh have seccondary purposes.And some of them consist of rather innovative and new purposes.Also,part of the sentences consist of multiplen purposes.the set of this feathers,raises the value of eloquency of this sureh from the point of secondary purpose.