And if Christ has not been raised, our preaching is useless and so is your faith. (NIV)
And if Christ has not risen, then our preaching is in vain [it amounts to nothing] and your faith is devoid of truth and is fruitless (without effect, empty, imaginary, and unfounded). (AMP)
And if Christ be not risen, then is our preaching vain, and your faith is also vain. (KJV)