constant and only the “ ”, “ ”, and “ ” letters change. These three letters are called root letters. Differentiating between nouns and verbs Basic Present Tense Form ُ َـي ُ لَ عْ ف ُ َ ـت ُ لَ عْ ف ... Example ُ َي ُ س رْ د ُ َت ُ س رْ د ... Masculine singular Feminine singular The root letters for the example are “ ”, “ ”, and “ ” د ر س ف ع ل