How long have you been running?
I've been running for...
How long have you been learning English?
I've been learning English since/for...
How long have you had your hair cut?
I've had my hair cut for...
How long have you been working as an archaelogist?
I've worked as an archaelogist...
How long have you been able to ride a bike?
I've been able to ride a bike since...
How long have you been exercising?
I've been exercising for...
How long have you been watching your favorite series?
I've been watching it...
How long have you lived in Germany?
I've lived in Germany...
How long have you had a car?
I've had a car...
How long have you been able to swim?
I've been able to swim since/for...
How long have you been drinking chimarrão?
I've been drinking it for...
How long have you known your English teacher?
I've known Marcelo...
How long have you had your cell phone?
I've had my mobile phone..
How long have you listened to sertanejo music?
I've listened...
How long have you had your dog?
I've had it...
How long have you been living in your present house/flat?
I've been living there since/for...
How long have you been in a relationship?
I've been in a relationship for...
How long have you been watching Marvel movies?
I've been watching them...
How long have you known your best friend?
I've known my best friend...
How long have you been celebrating Halloween?
I've celebrated ....