加拿大公民如果遞了485以後,在沒有拿到綠卡之前又回到加拿大讀4年書,對拿綠卡有影響嗎?
-Most likely yes if USCIS find you to stay outside US for too long time.
如果拿到了綠卡以後再去加拿大讀4年書,對維持綠卡有影響嗎?
-You need to have reentry permit which allows you to stay outside US for less than 2 years and you can renew it again.