How long has he had his hair like that?
.
How long have they been together?
They've been together _____.
How long have you been waiting?
.
How long have they known each other?
They've known each other _____.
How long have they been married?
.
How long have you had a mobile phone?
.
How long have you worked at your current job?
.
How long have you been learning English?
.
How long have you lived in your apartment/house?
.
How long has she been doing yoga?
She's been doing yoga _____.
He _____ _____ going to the gym _____ several years.
He has been going to the gym for several years.
How long has been since you adopt your pet?
.
How long have you got your computer?
.
How long has been since your last school project?
..
How long have been since you last worked out?
.
How long have been since you last saw a strike?
.
