This paper deals with curriculum Sibawayh in the study of the morphological level compared to modern curriculum that dealt with this aspect, it shows us that the definition of discharge has not been clear scientific form, but said rules and accountability of the book, but the language that consists of words structure description, and the structure of words, which consists of votes . And found that the word building in the Arabic language is based on the votes silent, or consonants that make up the word Islands, and adhesives that are added to the roots, and finds that the islands is the word center, and adhesives in the form of precedents, or suffixes added to the floor to function as syntactic or semantic. It also sees adhesives units restricted banking can not be used individually, but must relate to free banking unit, and that these adhesives lead when added to the morphological units free to grammatical functions, and this corresponds with the modern language lesson.