Vsem privet! I was wondering if someone could help me out with this fairly common English expression. You would typically say "I could have sworn" something happened when expressing disbelief while trying to convince someone. For example: "I could have sworn I packed my underwear"! (but it isn't in the suitcase). Or how about, "I could have sworn I saw him walk that way"… My assumption would be that if it can be expressed, it would be similar to how the phrase: "didn't I see you yesterday" translates. (Не видел я тебя вчера?) Zaranee spasibo.