Compared to John, he was an astoundingly difficult person to get to know. 
He was a difficult man to know.
He was easy to get to know.
A man and woman are sitting in an airport.
I have never been camping.
The brown-skinned children are sitting indoors on a mat.
Six helmeted workers are wading through the snow on the balcony.
I hate listening to running water.
They did not want people to comment on the proposal.