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1.請教老師專家們，給母親辦綠卡移民，我們兩姐妹相差十幾歲，妹妹今年6月才滿19歲，

是否可以依附母親一起遞交申請？？
-Not at all! Because your mother is the Immediate Relative of a US citizen (you), your sister cannot immigrate into US with her as her derivative. You can file another I-130 for your sister if you want to.

2.還是等母親綠卡成功後，再給她申請F2。F2A和F2B排期相差7年，現在申請F2A麵試超齡了是否還有效
-Your sister probably will be age-out as F2A at that time when the priority date is current, but the F2A I-130 can be changed to F2B. So, it is OK to file I-130 by your mother after she gets the green card.

所以著急問問大家！！！