how come that be possible

[sdpegasus]

Suppose one of my friends tell me something, that I find hard to believe.In that cast, can I use the expression "how come that be possible"

I know 'how is it possible' is the most natural way to express your disbelief. however I am eager to know if the aforesaid expression is correct or not.

 

[probus]

No.

"How come" is a synonym for why. You should say "How can that be possible?", or "How can that possibly be?"