My sister (20 yrs old), my mom, and I have been living in the States for about 13 years now. I became a Permanent Resident about two months ago. I am going to be married to my fiance (he's a US citizen) next year and will be taking my citizenship test as soon as I am able to in a couple years. Now the question is, once I become a citizen, will I be able to help my mom and sister get their green cards? They both hold F1 visas.