وَٱلَّيْلِ إِذَا يَغْشَىٰهَا
Sentence structure
وَٱلَّيْلِ is coordinated as a genitive oath noun. إِذَا يَغْشَىٰهَا is the temporal clause; يَغْشَىٰ is an imperfect with understood subject هُوَ and هَا as object.
Ayah summary
And by the night as it covers the sun.
وَٱلَّيْلِ — And the night
Grammar: وَ coordinates, ٱل defines, and لَّيْلِ is a masculine genitive oath noun. An omitted circumstantial element is associated with «ٱلَّيْلِ».
إِذَا — when
Grammar: A non-governing temporal adverb introducing the following time clause. This phrase is linked through an omitted element.
يَغْشَىٰهَا — it covers it
Grammar: A third-person masculine-singular indicative imperfect with understood subject هُوَ and attached object هَا.