1. My father has worked in this factory since last week.
2. He has lived in HCM city since he was 8.
3. He has learnt English since he was 18.
4. They began to work in that factory five years ago.
5. We started learning English four years ago.
6. He has worked in this company for 5 years.
7. They have lived here for ten years.
8. They have checked the machine for two hours.
9. Nam has learned English since 1998.
10. Nam has played computer games since 2002.