What about я за ним стоял ?
Is there some reason why "за ним я стоял" can't work too?
This is a rather unnatural order. I can imagine you uttering this in a heated manner, when someone accuses you of queue jumping (with stress being put on "за ним"), but hardly otherwise.
Why isn't this word order accepatable? "за ним я стоял" ----- the correct answer in a previous sentence in the exercise was "За ними стоит женщина". A woman is standing behind them". the same word order
"я был за ним" is correct ?