5 verses have
if
in Edition Clear Qur'an by Talal Itani / Al-Qalam (The Pen)

68:20And in the morning it was as if picked.

68:22“Go early to your plantation, if you are going to harvest.”

68:28The most reasonable of them said, “Did I not say to you, ‘if only you would glorify?’”

68:33Such is the punishment; but the punishment of the Hereafter is greater, if they only knew.

68:41Or do they have partners? Then let them produce their partners, if they are truthful.