1. Yes, I've been there.
2. Yes, I've seen a clown.
3. No, I've never been there.
4. have you ever found a bird's eggs?
- No, I've never found them before.
5. Have you ever climbed a mountain?
- No, I've never climbed a mountain.
6. Have you ever hidden from a wolf?
- No, I've never done that./I've never hidden from a wolf.