must doff
Verbo regular: doff - doffed- doffed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must doff
you must doff
he must doff
we must doff
you must doff
they must doff 	I must be doffing
you must be doffing
he must be doffing
we must be doffing
you must be doffing
they must be doffing	I must have doffed
you must have doffed
he 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
he must have been doffing
we must have been doffing
you must have been doffing
they must have been doffing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't doff
you mustn't doff
he 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
he 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
he 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
he mustn't have been doffing
we mustn't have been doffing
you mustn't have been doffing
they mustn't have been doffing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I doff?
must you doff?
must he doff?
must we doff?
must you doff?
must they doff? 	must I be doffing?
must you be doffing?
must he be doffing?
must we be doffing?
must you be doffing?
must they be doffing? 	must I have doffed?
must you have doffed?
must he 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 he have been doffing?
must we have been doffing?
must you have been doffing?
must they have been doffing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I doff?
mustn't you doff?
mustn't he 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 he 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 he 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 he have been doffing?
mustn't we have been doffing?
mustn't you have been doffing?
mustn't they have been doffing?