Do not equate the form ism al-fāʿil with the syntactic position fāʿil. In qāʾimun abūhu, the father is the doer, though Zayd is the topic.
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Two Frequent Misreadings
Ism al-Fāʿil: Formation, Governance, Conditions and Time
Do not equate the form ism al-fāʿil with the syntactic position fāʿil. In qāʾimun abūhu, the father is the doer, though Zayd is the topic.