My sister has a Green Card. She wants to become US citizen so she can sponsor her married daughter. I understand that net 5 years / 60 Months stay on US soil is necessary. Does this stay has to be continuous or it can be in broken periods? Any link to this information will be appreciated.
Kindly be aware that she needs at least 2.5 years of physical presence in the country in the last 5 years and she cannot have stayed abroad for more than 6 months at a time. Please see link below.