must proffer
Verbo regular: proffer - proffered- proffered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must proffer
you must proffer
he must proffer
we must proffer
you must proffer
they must proffer 	I must be proffering
you must be proffering
he must be proffering
we must be proffering
you must be proffering
they must be proffering	I must have proffered
you must have proffered
he must have proffered
we must have proffered
you must have proffered
they must have proffered	I must have been proffering
you must have been proffering
he must have been proffering
we must have been proffering
you must have been proffering
they must have been proffering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not proffer
you must not proffer
he must not proffer
we must not proffer
you must not proffer
they must not proffer 	I must not be proffering
you must not be proffering
he must not be proffering
we must not be proffering
you must not be proffering
they must not be proffering	I must not have proffered
you must not have proffered
he must not have proffered
we must not have proffered
you must not have proffered
they must not have proffered	I must not have been proffering
you must not have been proffering
he must not have been proffering
we must not have been proffering
you must not have been proffering
they must not have been proffering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I proffer?
must you proffer?
must he proffer?
must we proffer?
must you proffer?
must they proffer? 	must I be proffering?
must you be proffering?
must he be proffering?
must we be proffering?
must you be proffering?
must they be proffering? 	must I have proffered?
must you have proffered?
must he have proffered?
must we have proffered?
must you have proffered?
must they have proffered? 	must I have been proffering?
must you have been proffering?
must he have been proffering?
must we have been proffering?
must you have been proffering?
must they have been proffering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not proffer?
must you not proffer?
must he not proffer?
must we not proffer?
must you not proffer?
must they not proffer? 	must I not be proffering?
must you not be proffering?
must he not be proffering?
must we not be proffering?
must you not be proffering?
must they not be proffering? 	must I not have proffered?
must you not have proffered?
must he not have proffered?
must we not have proffered?
must you not have proffered?
must they not have proffered? 	must I not have been proffering?
must you not have been proffering?
must he not have been proffering?
must we not have been proffering?
must you not have been proffering?
must they not have been proffering?