أَرَءَيْتَ إِن كَذَّبَ وَتَوَلَّىٰٓ ١٣
Sentence structure
أَرَءَيْتَ introduces the interrogation; إِن كَذَّبَ is conditional and وَتَوَلَّىٰٓ is coordinated with it.
Ayah summary
But the one who prevents him rejects the truth and turns away.
أَرَءَيْتَ — Have you seen
Grammar: Interrogative أَ plus perfect with attached subject تَ.
إِن — if
Grammar: A conditional particle.
كَذَّبَ — he denies
Grammar: A Form II third-person masculine-singular perfect with understood subject.
وَتَوَلَّىٰٓ — and turns away
Grammar: وَ coordinates; a Form V third-person masculine-singular perfect with understood subject.