Question

Where do I draw the line between the complete subject and complete predicts ate

Most Boys enjoy sports.
Many pretty flowers were blooming in Mary's garden
The grandfather clock struck twelve.
The eraser on that pencil makes black streaks
The parade will pass down our street
The packages arrived in the morning mail.

Answer 1

most boys subject enjoy sports predicate
many pretty flowers subject were blooming ... predicate
the grandfather clock subject struck twelve predicate
the eraser on that pencil subject makes... predicate
the parade subject will pass... predicate
the packages subject arrived... predicate

... refers to continuation of the line till the end