How long _____ you ______ your friend?
have, known
How long have you played basketball?
For/Since...
How long have you had your phone?
For/Since...
How long has your friend known you?
For/Since...
How long _____ he _____ his camera?
have, had
How long has your mom had her phone?
For/Since...
How long have you known your best friend?
For/Since...
How long have you lived there?
For...
How long have you known your mom?
For/Since...
How long has he traveled to catch Pokemon?
For/Since...
How long _____ you _____ your laptop?
have, had
How long _____ you _____ your laptop?
have, had
How long have you studied English?
For/Since...
How long have you gone to your school?
For/Since...
How long have you had your hamster?
For/Since...
How long have they played football?
For/Since...