How long have you studied at your school?
I have studied at my school for 5 years
How long have you lived in this city / country?
I have lived in this city since 2014
How long have you known your best friend?
I have known my best friend for 10 years
How long have you had your pet?
I have had my pet for 2 years
How long has your father known your mother?
My father has known my mother for 20 years
How long has your family lived in your flat (house)?
My family have lived your house since 1998