回复：请问申请公民前，绿卡可在国外待多久？是3年里共可待6个月呢还是一次

是一次性就可待5，
Here is the physical presence requirements in U.S. for US citizenship application:

1. has lived continuously as a lawful permanent resident in the country for at least 5 years prior to filing with no single absence from the United States of more than one year;

2. has been physically present in the US for at least 30 months out of the previous five years (absences of more than six months but less than one year shall disrupt the applicant's continuity of residence unless the applicant can establish that he/she did not abandon his/her residence during such period) ; and

3. has stayed within a state or district for at least three months

所有跟帖： 

• 谢谢！一就是说我每年都可以回去待5，6个月的，是吗？ -evermiss- ♀ (0 bytes) () 12/24/2009 postreply 20:52:40

• Correct. -863211- ♂ (0 bytes) () 12/24/2009 postreply 21:31:42

• 谢谢！原来以为3年里只能回去6个月，现在按你说的那样 -evermiss- ♀ (10 bytes) () 12/24/2009 postreply 21:38:44