once / ever

[dido4]

1. What are the differences between once and ever?

2. I remember we once visited our uncle in Australia and clebrated christmas on the beach.

can I use ever instead of once:

I remember we ever visited our uncle in Australia and clebrated christmas on the beach.


Thank you.

[Temico]

Examples:

Q: Do you remember if we ever visited our uncle in Australia?

A1): Yes, I remember we once visited our uncle in Australia and celebrated Christmas on the beach.

A2: No, I don't remember ever visiting our uncle in Australia.