1. We don't serve couscous here.
2. They didn't understand the message.
3. They are not downloading the file.
4. Nobody has found the missing dog yet.
The missing dog
5. They won't talk to her anymore.
6. They would never answer your questions.
7. We cannot trust him.
8. They won't have given me anything by that time.
9. No one has ever replaced those tyres.
10. They needn't pay the bills soon.
11. Nobody had asked us.
12. They didn't do anything to solve the problem.
13. You oughtn't to do the quiz if you understood the lesson.
14. Nobody was looking at her.
15. Nobody has contacted the managers.