Oraciones Afirmativas

ELABORA 3 ORACIONES AFIRMATIVAS UTILIZANDO AUXILIAR COULD Y CAMBIALAS A LAS FORMAS NEGATIVAS E INTERROGATIVAS. A= i have finished my homework N=has Frank visited eduardo I= she has not had a cold? A=darla has visited maria N=has he studied very much for algebra I=i have not acted good? A=i have cooked a pizza N=has he killled animals I=she has not liker eat carrot?