откога

• since when
• ОТКОГА си тук? since when have you been here?
• ОТКОГА го познаваш? how long have you known him?
• ОТКОГА не си бил в...? how long is it since you were in...? ОТКОГА не си ходил в...? how long is it since you have been to...? ОТКОГА не си се бръснал? how long is it since you shaved?
• ОТКОГА са тези стенописи? to what period do these murals belong? how far back do these murals date?