In this article, the views of great medieval linguist Mahmud Zamakhshari in his work “Al-Mufassal fi sanati-l-i'rab” on Arabic language “maf'ul -– مفْعُول”, i.e. object and its variance, are compared with modern Arab scholars. Linguists such as Mustafa Ghalayini, Abbas Hasan, Antoine ad-Dahdah, Nemat Fuad, Abu Bakr Abdul Alim, methods expressing topic included analysis.