1. He has taught Chinese eight years. He has taught Chinese 2006.
2. We have been friends 2003. We have been friends a long time.
3. I have been learning Chinese last summer. I have been learning Chinese five months.
4. I have been chatting with my friend an hour. I have been chatting with my friend 10:00 a.m.
5. I have had a cold four days. I have had a cold Sunday.
6. We have lived in Bangkok 2001. We have lived in Bangkok 14 years.
7. We have been playing video games 4:00 p.m. We have been playing video games 45 minutes.
8. I have been practising soccer lunch time. I have been practising soccer three hours.
9. I have been cleaning my room this morning. I have been cleaning my room two hours.
10. My sister has been playing the piano two hours. My sister has been playing the piano 2:00 p.m.