A: Have you seen my wallet? B: Yeah. It's on my desk. A: Oh, Thanks. A: Are you sure? I don't see it. B: Yeah. I'm positive. *Positive: 100% 확실하다고 강조할 때 많이 사용함 B: That's weird. I could've sworn it was right here. *I could've sworn: 지금 보아하니 의심이 들긴 하지만, 난 정말 확실하다고 느끼고 있었다는 얘기를 할 때 흔히 사용하는 표현. A: Well, I know for a fact that it's somewhere in the office. I specifically remember carrying it when I c..