وَإِنْ لَمْ يَجُزِ الْعَطْفُ، تَعَيَّنَ النَّصْبُ، نَحْوُ: «مَا لَكَ وَزَيْدًا» وَ«مَا شَأْنُكَ وَعَمْرًا»؛ لِأَنَّ الْمَعْنَى: مَا تَصْنَعُ.
Translation: If coordination is not admissible, the accusative is required, as in “What concern have you with Zayd?” and “What is your affair with Amr?” because the sense is “What are you doing?”
This is case four. No verb is expressed, but the construction conveys an understood verbal relationship.
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Al-Mafʿūl Maʿahu: Accompaniment and Coordination
وَإِنْ لَمْ يَجُزِ الْعَطْفُ، تَعَيَّنَ النَّصْبُ، نَحْوُ: «مَا لَكَ وَزَيْدًا» وَ«مَا شَأْنُكَ وَعَمْرًا»؛ لِأَنَّ الْمَعْنَى: مَا تَصْنَعُ.
Translation: If coordination is not admissible, the accusative is required, as in “What concern have you with Zayd?” and “What is your affair with Amr?” because the sense is “What are you doing?”
This is case four. No verb is expressed, but the construction conveys an understood verbal relationship.