How long have you been studying Engl?
How long have your teacher been teaching eng?
How long have you and your family been living in your flat house?
How long has M M been living in London
How long have you been using this .. ?
2. She has been teaching english for almost ten years .
We have been living in this flat since I was a baby .
Mick has been living in London since he graduated the highschool .
I have been using this book from the begining of the school .