1. I have spoken with the boss
2. They haven't eaten anything
3. She has forgotten my phone number
4. I have made a mistake
5. You haven't shut the door
6. John has worked very hard
7. I haven't heard from Mary
8. Mary hasn't learned anything
9. I have broken a cup
10. We have remembered Ann's birthday
11. The rain hasn't stopped
12. I haven't seen Mary today