I'm having trouble diagramming sentences. How do you diagram an object complement? Ex. The stories made them proud of their achievements. Proud is an object complement, right? I can't figure out how to diagram it. Also, how do you diagram things when you have three or more verbs? I know how to do the free throw line, barn, whatever you want to call it, for two, but I don't know what to do for three. Thanks

Here are two excellent sites about diagramming sentences:

http://grammar.ccc.commnet.edu/grammar/diagrams2/diagrams_frames.htm
and
http://members.cox.net/teachro/grammar/diagramming.htm

These sites should help you.

About an object complement, this may help:
http://college.hmco.com/devenglish/broughton/focus_florida/1e/students/diagramming_basic/pattern_4.pdf
Scroll down.

To diagram an object complement, you need to first identify the main verb and the direct object in the sentence. An object complement is a word, phrase, or clause that renames or describes the direct object.

In the example sentence, "The stories made them proud of their achievements," the main verb is "made," the direct object is "them," and "proud" is the object complement.

Here's how you can diagram it:

[subject] [verb]
The stories made
[direct object] [object complement]
them proud

To diagram sentences with three or more verbs, you can use a compound predicate diagram.

Let's say we have the sentence, "She studied, practiced, and performed."

Here's how you can diagram it:

[subject]
She
[verb] [verb] [verb]
studied practiced performed

You can use a horizontal line to connect the subject to each verb, and then draw a diagonal line from each verb to the right, separating each verb. This way, you can show the subject and the multiple verbs in relation to each other.

Hope this helps! If you have any more questions, feel free to ask.