I found that her bed had been slept in, but she was gone.

Then he noticed something else: the bed behind him hadn't been slept on.

The room was empty, and the bed had never been slept in.

The bed had not been slept in, but was turned down ready for the night.

The bed was neatly made, hadn't been slept in or even sat upon.

Her bed had been slept in, even if the covers were cold.

She opened the door just a tiny bit, enough to see the bed hadn't been slept in and his room was empty.

The bed had been slept in and there was a tray of food on the table.

He found that the bed had not been slept in.

"But how do you account for the fact that her bed wasn't slept in?"