He was already back in bed when a thought suddenly occurred to him.

As I led him to the front door, something suddenly occurred to me.

An idea had suddenly occurred to her, and she sat up straight.

Or maybe, it suddenly occurred to him, she had a plan of her own.

He started at a thought that suddenly occurred to him.

Something suddenly occurred to her and she gave it voice.

I started to ask questions and it suddenly occurred to me.

It suddenly occurred to her that she did have something very important to take care of.

It occurred to him suddenly that he was in way over his head.

It suddenly occurred to him that he had the very people for the job.