
What else COULD I do?
The Big Bang Theory Season 5, Episode 11

I think that you COULD.
The Big Bang Theory Season 10, Episode 1

- If you want, we COULD tell you.
- I don't want to know.
The Big Bang Theory Season 6, Episode 19

Could I speak with you?
Game of Thrones Season 7, Episode 7

I suppose it COULD be Stuart,
The Big Bang Theory Season 11, Episode 11