TY - GEN 
AU - Fernández Camargo, Sandra Milena
AU - Parra Pérez, Diana Angélica
AU - Averanga, Alfredo Jose
AU - Corredor Plazas, Nelson Javier
AU - Suárez González, Juanita
AU - Coca García, María Camila
PY - 2016
UR - http://hdl.handle.net/10818/29141
AB - By the end of this lesson the student will be able to  to show that something started in the past and has continued up until now.
LA - eng
PB - Universidad de La Sabana
KW - Present
KW - Structure
KW - Verb to be
TI - Present Perfect Continuos
ER -