A yes -no question always has
A verb that can help ("do," "does," "did," "is," "are," "was," "were," "can," "could," "will," "would," "should," "may," "might," and "must.")
+
A person or thing doing the action
+
the action
He can bake. →
Can he bake?
Nina played the violin. →
Did Nina play the violin?