When people say “they're engaged,” the phrase “to be married” 'is understood'. [=“they're engaged” is understood to mean “they're engaged to be married”]
We still don't fully 'understand' the causes of the disease. = The causes of the disease are still not fully 'understood'.
He believed it 'was understood' [=believed that everyone had agreed] that he would be paid for the work.
(..) move fast enough. How about your gun? - And that they can do anything they want to you? I never understood why they paired some of you off. Seems cruel. And then I realized winning doesn't mean (..)2016 TvShow: Westworld Title: The Original Season: 1 Episode 1
(..) Well, that all depends. Can you keep up? Well, I have to fetch my horse. Better fetch him fast. - Never understood how you keep them all headed in the same direction. I forget you dress like a cowboy, but that's about (..)2016 TvShow: Westworld Title: The Original Season: 1 Episode 1