Zamień na perfect infinitive + modals.

1. Surely, Betty received a message from someone.
2. I am quite sure Tom was involved in the accident.
3. It is certain that they knew about our intentions.
4. Mr Higgis had problems with his memory, for sure.
5. It isn’t possible that she was a student.
6. It’s impossible that she was working at that time.
7. I am sure the man didn’t know my real name.
8. It’s impossible that he paid so much money for that.
9. It is possible that Mr Garret was kidnapped.
10. Perhaps Gina broke the engagement.