Tajtahid is jussive by sukūn. The nominal response fa-anta nājiḥun is connected by fāʾ and occupies the conditional-answer slot; its inner subject/predicate remain nominal.
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Case 3: When the Answer Is a Nominal Clause
Advanced Parsing Workshop: Integrated Grammar
Tajtahid is jussive by sukūn. The nominal response fa-anta nājiḥun is connected by fāʾ and occupies the conditional-answer slot; its inner subject/predicate remain nominal.