How long has he had that bike?
Since last month.
How long have they been married?
For ten years.
How long has she studied English?
Since she was a child.
How long have you had your phone?
For three months.
How long have they been friends?
For five years.
How long have you lived here?
For two years.
How long has she worked there?
Since 2020.
How long has he lived in Spain?
Since last summer.
How long have you known him?
For a long time.