Bob has a reporter for several years.
He has been working for Look magazine since 1996.
The Taylors got divorced 6 months ago.
My elder sister lived in Canada last year.
From the age of ten I have want to be an explorer
Since Christmas I have had a computer on my own.
I have been interested in science fiction for many years.
I have known Brian for years.
How long has your teacher been ill?
How long have you got a headache?
How long has David been working in an American Lab?
How long has he been married?
How has he been living in Switzerland?