1. I don't know who has won the competition.
2. I'm afraid I can't find the tickets.
3. The flowers she planted in the garden must have been dead by now.
4. I have been talking to her mother.
5. I have been working here for three years.
6. Miranda has never been to Scotland before.
7. I haven't seen him for over a year.
8. They haven't found out what the problem is.
9. She has run out of money.
10. Sue has just given birth to the first child.