Bird's-nesting boys, picnic parties, thousands of people passing! 
There were Bird's-nesting boys, picnic parties, and thousands of people passing!
There was not one person passing by.
A man is reading.
He never expected evolutionary psychologists to call on the government in this way.
Her fiance hates video games.
The woman is shaving the men's faces.
There is a guy speaking at a podium.
Little Billy was playing soccer with his soccer ball.