"Results revealed that hardly any forgetting over a 35-year period." should be
Results revealed that hardly any forgetting occurred over a 35-year period.
or
Results revealed that there was hardly any forgetting over a 35-year period.
2013-01-16 10:45:06 補充:
or
Results revealed that hardly anything was forgotten over a 35-year period.
2013-01-16 10:56:20 補充:
or
Results hardly revealed any forgetting over a 35-year period.