University of Ottawa (Canada)
University of Ottawa: The Writing Center: Verbals
After a discussion and explanation of verbals in general, this site specifically discusses the gerund and the participle (with a link to the infinitive) and also provides examples of each.
Robin L. Simmons
Grammar Bytes: The Compound Verb
This site shows how a sentence can have more than one verb. The examples begin with one verb and then builds until the sentence has seven verbs.