4. They started building this hospital three months ago
5. We have learnt English since we were grade 3
6. He has lived in this village since 2000
7. She has written novels since was 30
8. He has played the guitar since his sister's wedding
9. Nam has learnt how to cook since 2018
10. She began living in Hue when she was 39
11. We have lived here since 1995
12. We have studied English since 2008
13. We have lived here for fifteen years
14. Minh has collected stamps since 2000