Dual nominative ism takes alif and dual accusative khabar takes yāʾ; sound masculine plural accusative khabar also takes yāʾ.
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Dual and Plural Ism
Defective Verbs: Kāna and Its Sisters
Dual nominative ism takes alif and dual accusative khabar takes yāʾ; sound masculine plural accusative khabar also takes yāʾ.