回复：F1使用AP后就必需要用EAD拿奖学金吗

With I-485 pending, you will lose your F1 once you choose to leave US even for a day and can not re-gain F1. You must return using AP, and when you re-enter, you have no F-1 status. So after you return, you should go to international student office and notify them that you are no longer in F1 status.