She could not let herself think of what might have happened to cut him off.

He didn't like to think of what could happen then.

And still he did not think of what had happened as an attack.

When I think of what might have happened it makes my hair stand on end.

There was no time to think of what might happen.

Bob wouldn't let himself think of what would happen next.

Think of what might have happened if you had killed it.

She was thinking of what had happened on the train.

He must only think of what had happened, as if it were happening again, in the present.

"I hate to think of what would have happened had anyone but you tried to open it."