1. They have never discovered that murder’s case
2. She hasn’t eaten anything for days.
3. He has been to London.
4. Michael and David have been best friends since eight.
5. Eugene has made the best cinnamon rolls yesterday.
6. My dog has never thrown up.
7. He acts like he has never cried.
8. I have seen that movie several times.
9. You have grown since the last time I saw you.
10. Have you finished your project?