جَاءَ زَيْدٌ وَهُوَ يُسْرِعُ.
Zayd arrived while he was hurrying.
Jāʾa is a past verb, Zaydun its subject, and wa-huwa yusriʿu the attendant condition. Huwa is the nominal subject, and yusriʿu with its understood subject is its predicate. The circumstantial sentence is therefore nominal overall even though its predicate is verbal. Wāw marks the circumstantial connection; the construction is not simply “wāw plus an imperfect.”
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Wāw with Nominal Circumstantial Clauses: Omission, Inclusion and Disputed Cases
جَاءَ زَيْدٌ وَهُوَ يُسْرِعُ.
Zayd arrived while he was hurrying.
Jāʾa is a past verb, Zaydun its subject, and wa-huwa yusriʿu the attendant condition. Huwa is the nominal subject, and yusriʿu with its understood subject is its predicate. The circumstantial sentence is therefore nominal overall even though its predicate is verbal. Wāw marks the circumstantial connection; the construction is not simply “wāw plus an imperfect.”