回複：謝謝P大俠！也有類似問題，我理解是：

1）逾期者不能同時申請AP（回美證）。
-He can apply for the AP as long as he files I-485 or I-485 is pending. It is irrelevant to his unlawful presence. But if he is unlawfully present more than 180 days or one year, he can not use AP for the travel. Otherwise, he will be banned to enter US within 3 years or 10 years. So, the AP is useless in this case.

2）他得到綠卡後，可以申請AP，就不再受3/10年那種限製了。
是這樣嗎？
-After he gets the green card, he can travel to China using the green card and his travel n就不再受3/10年那種限製了by using green card even if he had the unlawful presence > 180 days or > one year.