إِنِّي أَرَانِي أَعْصِرُ خَمْرًا
“I see myself pressing wine.”
In Qurʾān 12:36, the material being pressed is grapes, whereas khamr names wine that may be made from their juice. The present substance is named after its anticipated result.
This is iʿtibār mā yakūn: designation by a state the thing will later acquire.
Iʿtibār mā kān: designation by a former condition.
Iʿtibār mā yakūn: designation by a later condition.
Both involve a temporal association rather than a likeness of form or quality.