The causative hamzah can be attached even to a verb which already governs two objects. Compare the source examples:
عَلِمْتُ زَيْدًا فَاضِلًا
Translation: I knew Zayd to be learned.
أَعْلَمْتُ زَيْدًا عَمْرًا فَاضِلًا
Translation: I informed Zayd that ʿAmr was learned.
The new addressee, Zayd, is introduced in the second sentence; the statement about ʿAmr is the information conveyed. This is a shift in argument structure, not merely a new vowel.
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Taʿdiyah: From Two Objects to Three
Fifteen Semantic Properties of Form IV (Ifʿāl): From Causation to Responsiveness
The causative hamzah can be attached even to a verb which already governs two objects. Compare the source examples:
عَلِمْتُ زَيْدًا فَاضِلًا
Translation: I knew Zayd to be learned.
أَعْلَمْتُ زَيْدًا عَمْرًا فَاضِلًا
Translation: I informed Zayd that ʿAmr was learned.
The new addressee, Zayd, is introduced in the second sentence; the statement about ʿAmr is the information conveyed. This is a shift in argument structure, not merely a new vowel.