A gerund IS a present participle

Must of was a passing fad. This site says they're different, the gerund is a verb pretending to be a noun and the present participle a verb pretending to be an adjective.

http://owl.english.purdue.edu/handouts/grammar/g_verbals.html#ger-part

Of course with nouns and adjectives cross-dressing so much these days, who knows? In Latin you could tell the diffenece just by looking, but then, they were a little stricter with the moral codes in them days. Nowadays we have verbs pretending to be adjectives acting as nouns and pretending to be nouns acting as adjectives. The whole thing just sets up a spinning in my head.