1. illā stands before the predicate: «مَا زَيْدٌ إِلَّا قَائِمٌ».
2. The khabar is fronted: «مَا قَائِمٌ زَيْدٌ».
3. Added in follows mā: «مَا إِنْ زَيْدٌ قَائِمٌ».
The predicate is nominative in all three source examples, not accusative.
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Three Reasons the Governance Ends
The Predicate of Mā and Lā Resembling Laysa
1. illā stands before the predicate: «مَا زَيْدٌ إِلَّا قَائِمٌ».
2. The khabar is fronted: «مَا قَائِمٌ زَيْدٌ».
3. Added in follows mā: «مَا إِنْ زَيْدٌ قَائِمٌ».
The predicate is nominative in all three source examples, not accusative.