The articles in this volume combine modern linguistic insights with the theories of Arab grammarians. The result is a series of studies on such aspects of the structure of Arabic as conditional sentences, adverbial clauses, and the particles "laqin" and "qad."; This volume also contains the edition and translation of a treatise on the pronunciation of the "dad" by the Grammarian Ali al-Nansuri, which discusses the phonetic status of the sound that was regarded by the Arabs themselves as the most characteristic sound of their language.