Here's a question and a few possible answers: 

Q: John didn't have any memory of the previous week and it was getting worse.  He was doing what to his entire life?
Possible A: last forever, forgetting, forgotten, rehabilitating, forgetfulness

Why is "forgetting" an answer aligned with human common sense? 


forgetting in the present is a sign of memory loss or medically termed dementia which worsens over time causing long-term memory loss