Sovereign Being
· 2d
If the offence is past the defence of the opposing team before a player passes them the ball, it's offside. If they pass the defence whilst the ball is in motion already, it's fine.
I might add.. it has to involve 2 players from the defending team too. One of them is usually the goalkeeper. Although, if the goal keeper isn't involved there must be a second defender involved for it to be offside. The law is "second to last opponent" for the offside rule to kick in.
Plus, the opposition can not be offside in their own half of the pitch.
You can not be offside from a throw in.