This book investigates the class of the strong verb by presenting and analyzing its morphological forms. The verbal forms are the perfect, imperfect, imperative and energetic verbs and the nominal ones are the infinitive noun, active and passive participles and the nouns of time, place and instrument. It also provides a survey of the theoretical structures by covering different topics that have been taken up in the most representative works of the Classical period from the 8th century until our days, such as the root, the additional segments, the question of the origin of the forms' derivation and the undeclinability of the perfect and imperative and the declinability of the imperfect and noun. The linguistic elements and the coverage of the different works offer a rich and complex picture of the Arabic language and make it accessible to both students and researchers of Arabic.