You can only have only visa at a time, so you cannot have both an F-1 visa and a TN visa. With a TN visa, however, you can take courses incidental to your TN status, but in that case your TN activity would have to be your primary activity.
If you’d like to further discuss your case with me, please contact my office directly to arrange for a consultation.
Edward Weiner
Attorney at Law
E-mail: E.Weiner@immigration-aux-usa.com
Internet Site:
http://www.immigration-aux-usa.com/