English verb conjugation
COULD COIF

Regular verb: coif - coifed - coifed

Affirmation

Simple form	V-ing form
I could coif you could coif he could coif we could coif you could coif they could coif	I could be coifing you could be coifing he could be coifing we could be coifing you could be coifing they could be coifing
Perfect	V-ing perfect
I could have coifed you could have coifed he could have coifed we could have coifed you could have coifed they could have coifed	I could have been coifing you could have been coifing he could have been coifing we could have been coifing you could have been coifing they could have been coifing

Negation

Simple form	V-ing form
I could not coif you could not coif he could not coif we could not coif you could not coif they could not coif	I could not be coifing you could not be coifing he could not be coifing we could not be coifing you could not be coifing they could not be coifing
Perfect	V-ing perfect
I could not have coifed you could not have coifed he could not have coifed we could not have coifed you could not have coifed they could not have coifed	I could not have been coifing you could not have been coifing he could not have been coifing we could not have been coifing you could not have been coifing they could not have been coifing

Interrogative form

Simple form	V-ing form
could I coif? could you coif? could he coif? could we coif? could you coif? could they coif?	could I be coifing? could you be coifing? could he be coifing? could we be coifing? could you be coifing? could they be coifing?
Perfect	V-ing perfect
could I have coifed? could you have coifed? could he have coifed? could we have coifed? could you have coifed? could they have coifed?	could I have been coifing? could you have been coifing? could he have been coifing? could we have been coifing? could you have been coifing? could they have been coifing?

Interro-negative form

Simple form	V-ing form
could I not coif? could you not coif? could he not coif? could we not coif? could you not coif? could they not coif?	could I not be coifing? could you not be coifing? could he not be coifing? could we not be coifing? could you not be coifing? could they not be coifing?
Perfect	V-ing perfect
could I not have coifed? could you not have coifed? could he not have coifed? could we not have coifed? could you not have coifed? could they not have coifed?	could I not have been coifing? could you not have been coifing? could he not have been coifing? could we not have been coifing? could you not have been coifing? could they not have been coifing?