Why is رِجَالًا accusative in رَأَيْتُ زَيْدًا وَرِجَالًا?

Noun Case Classes: Type 1 (Ḍamma, Fatḥa, Kasra)

• It is a topic
• It is a time adverbial
• It is coordinated with a genitive noun
• It is coordinated with an accusative object