A.T. Robertson Commentary Ephesians 5:11

"and have no fellowship with the unfruitful works of darkness, but rather even reprove them;" — Ephesians 5:11 (ASV)

Have no fellowship with (μη συνκοινωνειτε). No partnership with, present imperative with μη. Followed by associative instrumental case εργοις (works).

Unfruitful (ακαρποις). Same metaphor of verse 9 applied to darkness (σκοτος).

Reprove (ελεγχετε). Convict by turning the light on the darkness.