وَٱلْقَمَرِ إِذَا تَلَىٰهَا
Sentence structure
وَٱلْقَمَرِ is coordinated as another genitive oath noun. إِذَا introduces a temporal clause; تَلَىٰ is a perfect with understood subject هُوَ and attached هَا as object.
Ayah summary
And by the moon as it appears after the sun.
وَٱلْقَمَرِ — And the moon
Grammar: وَ coordinates, ٱل defines, and قَمَرِ is a masculine genitive oath noun. An omitted circumstantial element is associated with «ٱلْقَمَرِ».
إِذَا — when
Grammar: A non-governing temporal adverb introducing the following time clause. This phrase is linked through an omitted element.
تَلَىٰهَا — it follows it
Grammar: A third-person masculine-singular perfect with understood subject هُوَ and attached feminine-singular object هَا.