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

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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。