The Grammatical Change after إِنَّ

Emphasis in Nominal Sentences

When إِنَّ enters a nominal sentence, the former subject becomes اسمُ إِنَّ and is accusative. The predicate becomes خبرُ إِنَّ and remains nominative in the basic pattern.

Before
After إِنَّ
Role and case

زَيْدٌ
زَيْدًا
subject → اسمُ إِنَّ; accusative

صَالِحٌ
صَالِحٌ
predicate → خبرُ إِنَّ; nominative