can proffer
Verbo regular: proffer - proffered- proffered

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

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

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

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