What do you think of ----music aboard

先看熟悉例句：你介意我开窗吗?Do you mind my opening the windows?
当动名词短语的行为主体非主语时,用形容词来限定,例句中开窗非主语“你”,而是“我”,用了my；同样,本句中,出国学音乐的主体非主语“你”而是Mary,故用Mary's studying.