could have sworn

Definition of could have sworn

  1. —used to say that one feels definitely sure about something though it appears not to be true I could have sworn that I left my keys on the counter.

Word by Word Definitions

  1. : past tense ofcan

    : used in auxiliary function in the past , in the past conditional , and as an alternative to can suggesting less force or certainty or as a polite form in the present

  1. : past participle ofswear

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