o/u

[idiez at MAC.COM]

Is there an explanation about when the "o" is pronounced with a "u" 
sound? Mario just mentioned that it is for long "o"s, but I know from 
experience that this is not so.
John

John Sullivan, Ph.D.
Profesor de lengua y cultura nahua
Unidad Académica de Idiomas
Universidad Autónoma de Zacatecas
Director
Instituto de Docencia e Investigación Etnológica de Zacatecas, A.C.
Tacuba 152, int. 47
Centro Histórico
Zacatecas, Zac. 98000
México
Oficina: +52 (492) 925-3415
Fax: +52 (492) 925-3416
Domicilio: +52 (492) 768-6048
Celular: +52 (492) 544-5985
idiez at mac.com
www.idiez.org.mx