دُعِوَ → دُعِيَ
Translation: He was called.
In the passive, the action is described without naming its agent. The kasrah before the final weak letter leads to yāʾ replacing the underlying wāw. The resulting perfect is دُعِيَ, not دَعَا.
دَعَوْتُ — I called.
دُعِيتُ — I was called.
The vowel pattern as well as the final weak letter distinguishes active and passive.
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Passive Perfect: Formation
Defective Wāw Verb: Full Paradigm of دَعَا يَدْعُو with Morphological Explanations
دُعِوَ → دُعِيَ
Translation: He was called.
In the passive, the action is described without naming its agent. The kasrah before the final weak letter leads to yāʾ replacing the underlying wāw. The resulting perfect is دُعِيَ, not دَعَا.
دَعَوْتُ — I called.
دُعِيتُ — I was called.
The vowel pattern as well as the final weak letter distinguishes active and passive.