He's lived in it ___ (for/since) a very long time!
for
How long ___ (your grandpa, live) in that cottage?
has your grandpa lived
How long ___ (you, be) at the university?
have you been
How long ___ (your mom, work) in the factory?
has your mom worked
I've been here ___ (for/since) last year.
since
-How long ___ (your friends, be) in the cinema? -___ (For/Since) two hours!
have your friends been; For
-How long ___ (they, study) English? -___ (For/Since) 2009.
have they studied; Since
-How long ___ (you, be) a pilot? -___ (For/Since) eight months.
have you been; For
She's worked there ___ (for/since) she was 30.
since