Those of us over 35 have trouble remembering more than two or three things at a time.
He had no trouble remembering his place in the book.
"He had trouble remembering things you told him five minutes ago."
"I have so much trouble remembering anything good I've done."
"You're going to have a little trouble remembering things for a while."
He already had trouble remembering all the names of everyone working for him now.
Many people have trouble remembering these when they wake up, which may be a good thing.
But having been Turned only four years ago, he had no trouble remembering what being alive was like.
Let's say he has trouble remembering how to do things.
"I sometimes have trouble remembering what I'm supposed to remember," he said.