Babam yıllardır dış ticaretle meşgul. - My father has been engaged in foreign trade for many years.
Babam yıllardır dış ticaretle meşgul.
My father has been engaged in foreign trade for many years.
O yirmi yıldır dış ticaretle uğraşıyor. - He has been engaged in foreign trade for twenty years.
O yirmi yıldır dış ticaretle uğraşıyor.
He has been engaged in foreign trade for twenty years.