Continuous aspect is an imperfective aspect that expresses an ongoing, but not habitual, occurrence of the state or event expressed by the verb .
The word -sa expresses continuous aspect, as in the following example:
Dahl, Osten. 1985.Tense and aspect systems. New York: Basil Blackwell.
Comrie, Bernard. 1976a.Aspect: An introduction to verbal aspect and related problems. Cambridge, England: Cambridge University.
Bills, Garland D., Bernardo Vallejo C., and Rudolph C. Troike. 1969.An introduction to spoken Bolivian Quechua. Austin, TX: University of Texas.