Asking if someone remembers or not

Formal expressions:
- I wonder if you remember.....
- You remember...., don’t you?
- You haven’t forgotten...., have you?
- Don’t you remember.....?
- Do you happen to remember it now?

Ways to respond:
- Let me think, yes, I remember.
- I remember especially the scenery.
- I’ll never forget that
- I’ll always remember.
- I can remember it clearly.

Informal expressions:
- Remember the old house we used to live in?
- Remember that?
- I’m sorry I don’t remember

Ways to respond:
- Hold on. Yes, got it!
- I know.....
- It’s coming back to me now.

Respond if you forget:
- Sorry, I’ve completely forgotten.
- I’m affraid I forget.
- I really can’t remember.
- I’m afraid I have no memory of him
- Errr, let me think. No, it’s gone.
- Sorry, it slipped off my mind.

Example..
It was Sunday morning, Cinta got dressed and had breakfast quickly. She was ready to leave for school. Her mother was a little puzzled.
Mother : Hey...hey.... are you going to school?
Cinta : Yes, Mom. I overslept. I’m in a hurry
Mother : You remember Sunday, don’t you?
Cinta : Oh, my goodnes. I thought it’s a school day !