وَٱلسَّمَآءِ وَمَا بَنَىٰهَا
Sentence structure
وَٱلسَّمَآءِ continues the genitive oath sequence. وَمَا coordinates a relative noun, and بَنَىٰهَا is its relative clause with understood subject هُوَ and attached object هَا.
Ayah summary
And by the sky and its magnificent construction.
وَٱلسَّمَآءِ — And the heaven
Grammar: وَ coordinates, ٱل defines, and سَّمَآءِ is a feminine genitive oath noun.
وَمَا — and (He) Who
Grammar: وَ coordinates and مَا is a relative noun whose clause follows.
بَنَىٰهَا — constructed it
Grammar: A third-person masculine-singular perfect with understood subject هُوَ and attached object هَا, forming the relative clause.