Is the following explanation sound?<br/><br/><i>I'll stay here for two more months. </i>requires that I have stayed here for <b>at least one month</b>.<br/><br/><i>I'll stay here for another two months. </i>requires that I have stayed here for <b>at least two months</b>.<br/><br/><i>I'll stay here (for) two months more. </i>doesn't require any period of time.<br/><br/>or they're all the same?