seems to me cante would be the imperative since the infinitive is cantar.

Cante is the 3rd person singular imperative 'let her/him sing'. Canta is the 2nd person singular informal imperative 'sing (you)'.

[Corrected error of omission.]

Last edited by zmjezhd; 11/02/2009 3:01 PM.
Ceci n'est pas un seing.