En passant

No. Pawns don't capture moving forward. They capture on the diagonal. En passant just enables them to do that diagonal capture while an enemy pawn is trying to pass by in one two square jump forward.

https://support.chess.com/article/683-what-is-en-passant

It Should be banned!

I know how a pawn captures. But if a C pawn for example hop's 2 then captures a B pawn thus moving forward again, but then the opponent moves there C pawn forward 2 can En passant be used to capture that C pawn?   

I think en passant can only be played as the following move to a pawn that steps up 2 ranks. If you don't play en passant when the chance presents itself you cannot play it in that position as a later move.

1.c4, b5 2. c4xb5, c5 3. b5xc5

Yes you can en passant 

Oh I see what you mean now and its a no, you can only en passant against the initial 2 rank pawn move.

Yea im gonna need to dust off that rule book apparently ...

So move 35 i blundered my queen in this game but just follow what the pawn that captured my queen does..

Just looking at the game i had this with i don't even know how that pawn was able to take my advancing g4 pawn. That black pawn en passant me on it's 4th move

I meant 3. bxc6 as the correct notation because it’s capture by en passant also as illustrated in the Jaenisch Gambit variation played in the English.