She would really rather not think about what had just happened.

He would rather not think about what might have happened here.

I thought about what had happened the past few days.

Think about what must have happened all the years before 9/11.

He didn't want to think about what had just happened.

I did not want to think about what had happened to them.

I have not been able to stop thinking about what has happened.

He didn't even want to think about what might have happened.

I don't even want to think about what happened then.

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