إِذَا السَّمَاءُ انْفَطَرَتْ ۞ وَإِذَا الْكَوَاكِبُ انْتَثَرَتْ ۞ وَإِذَا الْبِحَارُ فُجِّرَتْ ۞ وَإِذَا الْقُبُورُ بُعْثِرَتْ
When the sky splits, the stars scatter, the seas burst forth, and the graves are overturned. (82:1–4)
Four occurrences of idhā place distinct events within one momentous future scene. The sequence shifts from sky to stars to seas and finally to the opening of graves: a movement from cosmic change to human resurrection. The succession also builds anticipation: what follows all these conditions?
In a standard grammatical analysis, the verb after “al-samāʾu” explains an understood earlier verb; simply treating the structure as an ordinary subject-predicate pair misses that analysis. Wāw gathers distinct scenes while the main result appears afterwards.