When is a 'doing word' not a verb? This article covers those words and phrases that look like they ought to be verbs, but grammatically aren't.
The Different Kinds of Verbal Phrases in the English Language
http://www.suite101.com/content/the-different-kinds-of-verbal-phrases-in-the-english-language-a377570
The Different Kinds of Verbal Phrases in the English Language
http://www.suite101.com/content/the-different-kinds-of-verbal-phrases-in-the-english-language-a377570