His uncle has not been back ( ) he left home three years ago

His uncle has not been back ( ) he left home three years ago he has left since three years ago可以用吗 Has he been a docture for three years ago? He has been away from China( )three years ago His sister left home in 1998,and-----since.A has not been he Li left his hometown three years ago Uncle Jack left his home town ten years ago.( 同义句 ) it has been three months since he left his home(4个同义句)并说一下解释 His father died three years ago.改成His father has been dead f It has been three hours since he left his office.把has been 换 he left his hometown five years ago.now he is not in his hom he left his hometown two years ago