Everyday Grammar: May, Might, and Must

This video is based on an article in the Everyday Grammar series: http://learningenglish.voanews.com/a/everyday-grammar-may-might-must-modals-certainty/2887387.html Originally published at - http://learningenglish.voanews.com/a/everyday-grammar-may-might-and-must/3458565.html