I 'could have sworn' that I left my keys on the counter. [=I'm very surprised that my keys are not on the counter because I definitely remember putting them there]
The new president will 'be sworn in' tomorrow.
Witnesses 'are sworn' to tell the truth.
(..) - OK, sir. I'll check it out. - Thank you. Good night. Therefore, I shall resign the presidency effective at noon tomorrow. Vice President Ford will be sworn in as President at that hour in this office. - Forrest Gump. - Yes, sir! As you were. I have your discharge papers. Service is up, son. (..)1994 Forrest Gump