must buff
Verbo regular: buff - buffed- buffed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must buff
you must buff
he must buff
we must buff
you must buff
they must buff 	I must be buffing
you must be buffing
he must be buffing
we must be buffing
you must be buffing
they must be buffing	I must have buffed
you must have buffed
he must have buffed
we must have buffed
you must have buffed
they must have buffed	I must have been buffing
you must have been buffing
he must have been buffing
we must have been buffing
you must have been buffing
they must have been buffing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't buff
you mustn't buff
he mustn't buff
we mustn't buff
you mustn't buff
they mustn't buff 	I mustn't be buffing
you mustn't be buffing
he mustn't be buffing
we mustn't be buffing
you mustn't be buffing
they mustn't be buffing	I mustn't have buffed
you mustn't have buffed
he mustn't have buffed
we mustn't have buffed
you mustn't have buffed
they mustn't have buffed	I mustn't have been buffing
you mustn't have been buffing
he mustn't have been buffing
we mustn't have been buffing
you mustn't have been buffing
they mustn't have been buffing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I buff?
must you buff?
must he buff?
must we buff?
must you buff?
must they buff? 	must I be buffing?
must you be buffing?
must he be buffing?
must we be buffing?
must you be buffing?
must they be buffing? 	must I have buffed?
must you have buffed?
must he have buffed?
must we have buffed?
must you have buffed?
must they have buffed? 	must I have been buffing?
must you have been buffing?
must he have been buffing?
must we have been buffing?
must you have been buffing?
must they have been buffing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I buff?
mustn't you buff?
mustn't he buff?
mustn't we buff?
mustn't you buff?
mustn't they buff? 	mustn't I be buffing?
mustn't you be buffing?
mustn't he be buffing?
mustn't we be buffing?
mustn't you be buffing?
mustn't they be buffing? 	mustn't I have buffed?
mustn't you have buffed?
mustn't he have buffed?
mustn't we have buffed?
mustn't you have buffed?
mustn't they have buffed? 	mustn't I have been buffing?
mustn't you have been buffing?
mustn't he have been buffing?
mustn't we have been buffing?
mustn't you have been buffing?
mustn't they have been buffing?