1 How long have you been studying English?
2. How long have you been collecting coins?
3. How long have you been working on the project?
4. How long have you been wearing glasses?
5. How long have you been looking for the key?
6. How long have you been using
the computer?
7. How long have you been taking the medicine?
1 How long have you been studying English?
2. How long have you been collecting coins?
3. How long have you been working on the project?
4. How long have you been wearing glasses?
5. How long have you been looking for the key?
6. How long have you been using
the computer?
7. How long have you been taking the medicine?