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我绿卡今年6月份过期，已经离美多年未曾入境。现准备回美工作，并已得到offer.请问我还可以用该绿卡入境吗？如果我8月份才去美，应该怎么做比较好？谢谢

-Your green card has been void because you has been out of US continuously for > one year (离美多年未曾入境). So, you can not use this green card to reenter US. You may abandon the green card and apply for a non-immigrant visa to enter US such as H-1, B-2, etc.

You had better consult an immigrant lawyer because I don't know the details why you stayed outside US for too long time.