مَا زَالَ زَيْدٌ قَائِمًا
Translation: Zayd has continued standing.
مَا: negative particle.
زَالَ: past incomplete verb.
زَيْدٌ: nominative ism zāla.
قَائِمًا: accusative khabar zāla.
The prohibition concerns moving the predicate ahead of the entire mā + verb unit; the ordinary case rule remains the same.