English verb conjugation
COULD BLUE

Regular verb: blue - blued - blued

Affirmation

Simple form	V-ing form
I could blue you could blue he could blue we could blue you could blue they could blue	I could be bluing you could be bluing he could be bluing we could be bluing you could be bluing they could be bluing
Perfect	V-ing perfect
I could have blued you could have blued he could have blued we could have blued you could have blued they could have blued	I could have been bluing you could have been bluing he could have been bluing we could have been bluing you could have been bluing they could have been bluing

Negation

Simple form	V-ing form
I could not blue you could not blue he could not blue we could not blue you could not blue they could not blue	I could not be bluing you could not be bluing he could not be bluing we could not be bluing you could not be bluing they could not be bluing
Perfect	V-ing perfect
I could not have blued you could not have blued he could not have blued we could not have blued you could not have blued they could not have blued	I could not have been bluing you could not have been bluing he could not have been bluing we could not have been bluing you could not have been bluing they could not have been bluing

Interrogative form

Simple form	V-ing form
could I blue? could you blue? could he blue? could we blue? could you blue? could they blue?	could I be bluing? could you be bluing? could he be bluing? could we be bluing? could you be bluing? could they be bluing?
Perfect	V-ing perfect
could I have blued? could you have blued? could he have blued? could we have blued? could you have blued? could they have blued?	could I have been bluing? could you have been bluing? could he have been bluing? could we have been bluing? could you have been bluing? could they have been bluing?

Interro-negative form

Simple form	V-ing form
could I not blue? could you not blue? could he not blue? could we not blue? could you not blue? could they not blue?	could I not be bluing? could you not be bluing? could he not be bluing? could we not be bluing? could you not be bluing? could they not be bluing?
Perfect	V-ing perfect
could I not have blued? could you not have blued? could he not have blued? could we not have blued? could you not have blued? could they not have blued?	could I not have been bluing? could you not have been bluing? could he not have been bluing? could we not have been bluing? could you not have been bluing? could they not have been bluing?