I have an assignment about sentence diagramming. I need help. Any example given will be great.

http://teachro.publiccomputingservices.org/

This teacher's website has the best grammar and diagramming explanations and examples I've found.

This site gives you the basics.

http://grammar.ccc.commnet.edu/grammar/diagrams2/one_pager1.htm

If you have a question about a specific sentence, please post it and I'll help you.

There are two sentences that vary only by one word difference.

Sentences:

The young girl wrote a short note to her mother.

The young girl sent a short note to her mother.

My Answer:

Girl sent/wrote Note ---to Mother
-the -a -her
-young -short

The structure is:Noun, verb, noun, (Preposition),noun

Please help me understand this and thanks for the links.

Girl (the, young), sent/wrote, Note (a, short), preposition, Mother (her)

Right.

Is there any difference? I don't know if its a trick question or if I really have two questions that are the same.

Obviously there's a slight difference in meaning, but grammatically there's no difference. Both wrote and sent are transitive verbs and have a direct object.