They seem to know all about it.
They seem to have heard all about it.
The discussion seemed to be coming to an end.
You don’t seem to approve of the idea.
The house seemed not to have been lived in for a long time.
He appeared to be losing patience.
He appeared not to have heard what had been said.
I happened to be present at the opening session.
I happened to overhear their conversation.
My prediction turned out to be correct.
The language of the article turned out to be quite easy.