Present perfect. Change the following sentences to questions.

1. Trent has finished cleaning.

2. They have started playing.

3. It has stopped working.

4. Quincy and Janet have worked together.

5. They have left.

6. I have seen this show.

7. She has tried to contact you.

8. Faruk has lived in this town all his life.

9. They have been here before.

10. They have solved the problem.