'Happened' in the Bible

Now after an interval of about three hours his wife came in, not knowing what had happened.

They said to Aaron, ‘Make for us gods who will go before us; for this Moses who led us out of the land of Egypt, we do not know what has happened to him.’

Then all who lived at Lydda and the plain of Sharon saw [what had happened to] him, and they turned to the Lord.

And it happened that the father of Publius was sick [in bed] with recurring attacks of fever and dysentery; and Paul went to him, and after he had prayed, he laid his hands on him and healed him.