Present perfect. Change the following sentences to questions.

1. Quincy and Janet have worked together.

2. They have started playing.

3. Trent has finished cleaning.

4. I have seen this show.

5. It has stopped working.

6. She has tried to contact you.

7. They have solved the problem.

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

9. They have left.

10. They have been here before.