هَلْ زَيْدٌ قَائِمٌ؟
Is Zayd standing?
If hal could only precede a verb, how could the ordinary nominal “Hal Zaydun qāʾimun?” be acceptable? This counterexample reveals the need to qualify explanations based solely on the alleged qad origin.
The contrast is between a normal nominal predicate and a noun moved ahead of an ensuing verb. The text discusses reasons advanced for the preference together with objections; no single proposed reason should be presented as beyond dispute.