could coif
Regular verb: coif - coifed- coifed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
I couldn't coif
you couldn't coif
he couldn't coif
we couldn't coif
you couldn't coif
they couldn't coif 	I couldn't be coifing
you couldn't be coifing
he couldn't be coifing
we couldn't be coifing
you couldn't be coifing
they couldn't be coifing	I couldn't have coifed
you couldn't have coifed
he couldn't have coifed
we couldn't have coifed
you couldn't have coifed
they couldn't have coifed	I couldn't have been coifing
you couldn't have been coifing
he couldn't have been coifing
we couldn't have been coifing
you couldn't have been coifing
they couldn't have been coifing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
couldn't I coif?
couldn't you coif?
couldn't he coif?
couldn't we coif?
couldn't you coif?
couldn't they coif? 	couldn't I be coifing?
couldn't you be coifing?
couldn't he be coifing?
couldn't we be coifing?
couldn't you be coifing?
couldn't they be coifing? 	couldn't I have coifed?
couldn't you have coifed?
couldn't he have coifed?
couldn't we have coifed?
couldn't you have coifed?
couldn't they have coifed? 	couldn't I have been coifing?
couldn't you have been coifing?
couldn't he have been coifing?
couldn't we have been coifing?
couldn't you have been coifing?
couldn't they have been coifing?