He knew some of what had happened between them, not all.

But within a very few days something had happened between them.

What had happened between the time he came to see me and now?

Or for her to act as if nothing had happened between them at all.

Despite whatever had happened between them, he was still very much in love with her.

Whatever happened between the two of you is in the past.

Don't try to tell me what happened between the two of us didn't mean anything to you.

I'm not quite sure what happened between them while I was away.

But what happened to him between 1945 and 1988 is less clear.

What happened between you and her was a long time ago.