The owner of the ḥāl, aṭ-ṭālibu, is a nominative subject. Only mubtasiman, the circumstance, is accusative.
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Case 5: The Owner of Ḥāl May Be Nominative
Advanced Parsing Workshop: Integrated Grammar
The owner of the ḥāl, aṭ-ṭālibu, is a nominative subject. Only mubtasiman, the circumstance, is accusative.