قَابَلْتُ أَخَاكَ خَالِدًا.
“I met your brother Khālid.”
قَابَلْتُ: past verb and first-person subject.
أَخَاكَ: accusative object with alif and possessive suffix kāf.
خَالِدًا: accusative explanatory apposition with fatḥah.
The apposition has fatḥah because it follows an accusative antecedent.