And it will come to pass that those who are [now] bent on denying this truth will wish that they had surrendered themselves to God [in their life time].

Again and again will those who disbelieve, wish that they had bowed (to God's will) in Islam.

It may be that those who disbelieve wish ardently that they were Muslims.

Often will those who disbelieve wish that they were Muslims.

Perhaps those who disbelieve will wish that they had been Muslims.