must coif
Regular verb: coif - coifed- coifed

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

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

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

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