1. How long have you been at your school?
1. I have you been ten years at my school.
2. How long have lived in your city/town?
2. I have lived 17 years in my city.
3. How long have you known your best friend?
3. I have known my best friend ten years.
4. Since when have you begun to learn English?
4. I have begun to learn English since 2004.
5. How long have you lived in your house?
5. I have lived in my house 17 years.
6. How long have you had your schoolbag?
6. I have had my schoolbag two years.