敬爱的8老师，想请教一下，我和女朋友打算近期结婚，她OPT签证明年二月十日到期，我持有绿卡快十年了，打算申请成为公民以后和她结婚。请问转成公民需要多长时间呢？
-Several months, normally. Case by case.
能在她签证到期前来得及吗？
-Fine.
而她和我结婚以后，等待绿卡期间，OPT签证过期了怎么办？
-It does not matter. Her illegal stay will not affect her green card application.
等待绿卡期间有多长，-Case by case.
期间能回国吗？
-Yes, she can apply for advance parole to travel.
万分感激！
