قَامَ زَيْدٌ.
Translation: Zayd stood up.
This is a straightforward verb–subject example. قَامَ expresses standing, and زَيْدٌ is the noun to which the action is attributed. Therefore, Zayd is the fāʿil and is nominative because it occupies that role. Its visible nominative marker is ḍamma.
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Al-Marfūʿāt: The Fāʿil, Its Definition and Full Parsing
قَامَ زَيْدٌ.
Translation: Zayd stood up.
This is a straightforward verb–subject example. قَامَ expresses standing, and زَيْدٌ is the noun to which the action is attributed. Therefore, Zayd is the fāʿil and is nominative because it occupies that role. Its visible nominative marker is ḍamma.