<a href='http://www.usingenglish.com/glossary/non-finite-verb.html' target='_blank' rel='nofollow'>Usingenglish.com</a> defines non-finite verbs as those verbs that have no tense person or singular plural. But according to the following page, <i>raining</i> is a non-finite verb. Please explain this problem.<br/><br/><a href='http://www.phon.ucl.ac.uk/home/dick/aux.htm' target='_blank' rel='nofollow'>http://www.phon.ucl.ac.uk/home/dick/aux.htm</a><br/><br/>GB