astrofisica
Bueno en general se lo utiliza como auxiliar en el presente simple para las terceras personas como she, he,it. Además en oraciones negativas, en preguntas y repuestas de yes o no. Ejm: she does not eat pasta what does she eat? she eats hamburger every day.
Ejm: she does not eat pasta
what does she eat?
she eats hamburger every day.
ejem: She does the homework