And I've heard of three more in the past year.

For some time after no news was heard of her.

No one had heard of the king in days, and some thought him dead.

I had never even heard of her until she died.

No one had ever heard of such a thing before.

More than likely, they hadn't even heard of such a technology.

She hadn't ever heard of too many children who got to be with their parents at work.

She was dead a day before you ever even heard of her.

I asked if she'd heard of anyone's boy not coming home last night.

Never heard of her and probably won't in the future.