加拿大公民如果递了485以后,在没有拿到绿卡之前又回到加拿大读4年书,对拿绿卡有影响吗?
-Most likely yes if USCIS find you to stay outside US for too long time.
如果拿到了绿卡以后再去加拿大读4年书,对维持绿卡有影响吗?
-You need to have reentry permit which allows you to stay outside US for less than 2 years and you can renew it again.