زَيْدٌ ضَرَبَ الْكُرَةَ.
Zayd is the initial subject; ḍaraba is a past verb with concealed huwa as its subject, referring back to Zayd; al-kurata is the object; the verbal clause is the predicate.
فَاطِمَةُ ضَرَبَتْ الْكُرَةَ.
Fāṭimah is the initial subject; ḍarabat is a past verb, -t marks feminine gender; the concealed subject is hiya; al-kurata is the object; the verbal clause is the predicate.