1. I have lived in London for six months.
2. I have danced since I was small.
3. She hasn't had a day off for three months.
4. I've lost so much flexibility since I injured my leg.
5. They have all improved in attitude since the headmaster talked to them.
6. Wars have been happening for centuries, it won't ever change.
7. I haven't been on holiday for ages.
8. I haven't eaten that much for Christmas.
9. I haven't been on holiday since last year.
10. She hasn't seen her jacket since yesterday, I think she lost it.