must coffer
Verbo regular: coffer - coffered- coffered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must coffer
you must coffer
he must coffer
we must coffer
you must coffer
they must coffer 	I must be coffering
you must be coffering
he must be coffering
we must be coffering
you must be coffering
they must be coffering	I must have coffered
you must have coffered
he must have coffered
we must have coffered
you must have coffered
they must have coffered	I must have been coffering
you must have been coffering
he must have been coffering
we must have been coffering
you must have been coffering
they must have been coffering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't coffer
you mustn't coffer
he mustn't coffer
we mustn't coffer
you mustn't coffer
they mustn't coffer 	I mustn't be coffering
you mustn't be coffering
he mustn't be coffering
we mustn't be coffering
you mustn't be coffering
they mustn't be coffering	I mustn't have coffered
you mustn't have coffered
he mustn't have coffered
we mustn't have coffered
you mustn't have coffered
they mustn't have coffered	I mustn't have been coffering
you mustn't have been coffering
he mustn't have been coffering
we mustn't have been coffering
you mustn't have been coffering
they mustn't have been coffering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I coffer?
must you coffer?
must he coffer?
must we coffer?
must you coffer?
must they coffer? 	must I be coffering?
must you be coffering?
must he be coffering?
must we be coffering?
must you be coffering?
must they be coffering? 	must I have coffered?
must you have coffered?
must he have coffered?
must we have coffered?
must you have coffered?
must they have coffered? 	must I have been coffering?
must you have been coffering?
must he have been coffering?
must we have been coffering?
must you have been coffering?
must they have been coffering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I coffer?
mustn't you coffer?
mustn't he coffer?
mustn't we coffer?
mustn't you coffer?
mustn't they coffer? 	mustn't I be coffering?
mustn't you be coffering?
mustn't he be coffering?
mustn't we be coffering?
mustn't you be coffering?
mustn't they be coffering? 	mustn't I have coffered?
mustn't you have coffered?
mustn't he have coffered?
mustn't we have coffered?
mustn't you have coffered?
mustn't they have coffered? 	mustn't I have been coffering?
mustn't you have been coffering?
mustn't he have been coffering?
mustn't we have been coffering?
mustn't you have been coffering?
mustn't they have been coffering?