How do I diagram: The awful witch flew in front of the moon.

Answer 1

First -- the subject and verb:

WITCH | FLEW

THE and AWFUL are adjectives and are placed on diagonal lines under WITCH.

IN FRONT is a prepositional phrase modifying FLEW. OF THE MOON is a prepositional phrase modifying FRONT.

This site may help you.

(Broken Link Removed)

Answer 2

Here is another great site:
http://grammar.ccc.commnet.edu/GRAMMAR/diagrams2/diagrams_frames.htm

Answer 3

This is the very best diagramming site . It was put up by one of our teachers.

http://members.cox.net/teachro/diagramming/diagramming.htm