continue:
If the adult child refuse to fulfill above of these:
When the child over 18 years of age (still permanent resident status, not joined nationality), refuse to go to work (or do business), refuse to tax payment long period. Or also refuse to go to school. Stay in USA have nothing to do and get something for nothing.
If the adult child stay in USA, refuse to go to work (or or do business) and tax payment, or refuse to go to school, get something for nothing continue long period. Or when the adult child's permanent resident certificate will expire soon. Immigration Office will warn the adult child should go to work (or do business) and tax payment, or go to school. But if the adult child still ignore the relevant departments' warning.