But it had happened in the past, and would happen again.

We do not want to hold a trial of what happened in the past.

He doesn't seem to care too much about what has happened in the past.

And that would never have happened in the past, either.

Has this happened in the past, not once but many times?

They are not looking back at what happened in the past.

All too often that is what has happened in the past.

Everything important has happened in the past, and we are its children.

That is what has happened so often in the past.

I don't want to think about what happened in the past.