I had my US green card interview back on May 18 2010 through marring a citizen. I know I can apply for citizenship 90 days prior to May 18, 2013. However on May 1st of 2013 I need to leave the US for about 6-8 months due to personal reasons. Can I still apply for US citizenship even though I would not be here at that time? I would send the papers in March. I would still be a resident of the US and I would come back for the interview at any given time they would ask me to. Also one more question is that during those 3 years I had my green card I left on vacation out of the country for the total of a month and a half. Should I subtract the time I was out of the country from the 3 years? Please let me know. Thank you!