Sentence examples for what should have from inspiring English sources

"The second is about what should have been.

What should have West discarded?

What should have happened?

What should have happened here?

It's what should have happened".

But what should have happened didn't happen".

And that is what should have happened.

So what should have been done differently?

Of course, that's what should have happened.

And yet, what should have changed?

But what should have been done?