just a ?

[DaLastHope]

My grandmother is a us citizen can she file or adjust my mother and my status i'm 21yrs old status.

[Laura]

Your grandmother can petition for your mother, but not for you. And.... it will take approximately 15 years for a visa number to become available for your mom. Theoretically, after your mom gets her PR status or USC-ship she can petition for you. But, obviously, that's an incredibly long process. Are you in the U.S. currently? Did you enter on a visa?

[DaLastHope]

i did enter on a visa.

[Gilmour_Fan]

why would it take so long for a visa number for the mother?

[Laura]

Because a parent petitioning a child takes a long, long time... Look at the visa bulletin (http://travel.state.gov/visa/frvi/bulletin/bulletin_3841.html). If the OP were a USC petitioning his mother (and she had never been unlawfully present) that would be a different story because that is an immediate visa, but petitioning for adult children is not an automatic visa.

[Coventrated]

It depends on the country you are from, the timelines mentioned above only apply for Mexico and the Phillipines.

Otherwise you are looking at 5 years or so.

You and your mother would need to maintain Status in the US some other way if you intend staying here.

[Laura]

Good point Cov.