«مَا قَائِمٌ زَيْدٌ»
mā: non-governing negative particle.
qāʾimun: fronted nominative khabar.
Zaydun: delayed nominative mubtadaʾ.
Fronting the predicate prevents the accusative governance in this source construction.
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Parsing: Mā Qāʾimun Zaydun
The Predicate of Mā and Lā Resembling Laysa
«مَا قَائِمٌ زَيْدٌ»
mā: non-governing negative particle.
qāʾimun: fronted nominative khabar.
Zaydun: delayed nominative mubtadaʾ.
Fronting the predicate prevents the accusative governance in this source construction.