KJV - What and if ye shall see the Son of man ascend up where he was before?

ASV - `What' then if ye should behold the Son of man ascending where he was before?

BBE - What then will you say if you see the Son of man going up to where he was before?

WEB - Then what if you would see the Son of Man ascending to where he was before?

YLT - if then ye may behold the Son of Man going up where he was before?

Notes