إِنَّ فِي الدَّارِ زَيْدًا
Translation: Indeed, Zayd is in the house.
إِنَّ: indeclinable emphatic particle.
فِي: preposition.
الدَّارِ: genitive noun after it.
فِي الدَّارِ: prepositional phrase attached to an omitted predicate, functioning as the fronted khabar inna.
زَيْدًا: delayed ism inna, accusative by fatḥa.
Only the **order** changes; the governing case roles remain unchanged.