Could I ask if you remember the date?您还记得那天是几号吗？

1. Can you recall the days?你还能回想起那些日子吗？2. Can't you remember?你不记得了吗？3. You haven't forgot him, have you?你没忘记他，是吧？4. I wonder if you remember it.不知道你是否还记得它。