A. When I <b>get off</b> the train, I'll call you back.<br/>B. When I<b>'ve got off</b> the the train, I'll call you back.<br/><br/>1. Which of the above is correct?<br/>2. If both are possible, what is the difference in meaning?<br/>3. Which is more natural and common?<br/><br/>In B, I just used "got" as the past participle of "get" in British English. I understand that "gotten" is the equivalent in American English.<br/><br/>I would very much appreciate your help, please.