must doff
Regular verb: doff - doffed- doffed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must doff
you must doff
she must doff
we must doff
you must doff
they must doff 	I must be doffing
you must be doffing
she must be doffing
we must be doffing
you must be doffing
they must be doffing	I must have doffed
you must have doffed
she must have doffed
we must have doffed
you must have doffed
they must have doffed	I must have been doffing
you must have been doffing
she must have been doffing
we must have been doffing
you must have been doffing
they must have been doffing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't doff
you mustn't doff
she mustn't doff
we mustn't doff
you mustn't doff
they mustn't doff 	I mustn't be doffing
you mustn't be doffing
she mustn't be doffing
we mustn't be doffing
you mustn't be doffing
they mustn't be doffing	I mustn't have doffed
you mustn't have doffed
she mustn't have doffed
we mustn't have doffed
you mustn't have doffed
they mustn't have doffed	I mustn't have been doffing
you mustn't have been doffing
she mustn't have been doffing
we mustn't have been doffing
you mustn't have been doffing
they mustn't have been doffing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I doff?
must you doff?
must she doff?
must we doff?
must you doff?
must they doff? 	must I be doffing?
must you be doffing?
must she be doffing?
must we be doffing?
must you be doffing?
must they be doffing? 	must I have doffed?
must you have doffed?
must she have doffed?
must we have doffed?
must you have doffed?
must they have doffed? 	must I have been doffing?
must you have been doffing?
must she have been doffing?
must we have been doffing?
must you have been doffing?
must they have been doffing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I doff?
mustn't you doff?
mustn't she doff?
mustn't we doff?
mustn't you doff?
mustn't they doff? 	mustn't I be doffing?
mustn't you be doffing?
mustn't she be doffing?
mustn't we be doffing?
mustn't you be doffing?
mustn't they be doffing? 	mustn't I have doffed?
mustn't you have doffed?
mustn't she have doffed?
mustn't we have doffed?
mustn't you have doffed?
mustn't they have doffed? 	mustn't I have been doffing?
mustn't you have been doffing?
mustn't she have been doffing?
mustn't we have been doffing?
mustn't you have been doffing?
mustn't they have been doffing?