말이 기억나지 않을 때

A: Are you with me?
   - 내말 듣고 있어?

B: Oops, I was somewhere else.
   - 어머, 잠시 딴생각 했네.

-> I totally forgot/ just forgot. 깜박 했다.

-> It's on the tip of my tongue. 혀끝에서 뱅뱅 도는데.

-> The cat got your tongue? 왜 꿀 먹은 벙어리야?