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.
(..) Because you are not my enemy. And I'm not yours. You sure seemed like my enemy when you were killing my friends. For years the Night's Watch have sworn an oath to be the shield that guards the realms of men. And for years we've fallen short of that oath. You belong to the realms of men. (..)2015 TvShow: Game of Thrones Title: Kill the Boy Season: 5 Episode 5