How long have you known your best friend?
I've known him/her for/since...
How long have you read a book?
I've read a book for/since...
How long have you listened to your favorite music?
I've listened to my favorite music for/since...
How long have you spoken english?
I've spoken english for/since...
How long have you studied in this school?
I've studied in this school for/since...
How long have you had you favorite toy?
I've had my favorite toy for/since...
How long have you lived in your town?
I've lived in my town for/since
How long have you lived in your house?
I've lived in my house for/since...