could muff
Verbo regular: muff - muffed- muffed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could muff
you could muff
she could muff
we could muff
you could muff
they could muff 	I could be muffing
you could be muffing
she could be muffing
we could be muffing
you could be muffing
they could be muffing	I could have muffed
you could have muffed
she could have muffed
we could have muffed
you could have muffed
they could have muffed	I could have been muffing
you could have been muffing
she could have been muffing
we could have been muffing
you could have been muffing
they could have been muffing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not muff
you could not muff
she could not muff
we could not muff
you could not muff
they could not muff 	I could not be muffing
you could not be muffing
she could not be muffing
we could not be muffing
you could not be muffing
they could not be muffing	I could not have muffed
you could not have muffed
she could not have muffed
we could not have muffed
you could not have muffed
they could not have muffed	I could not have been muffing
you could not have been muffing
she could not have been muffing
we could not have been muffing
you could not have been muffing
they could not have been muffing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I muff?
could you muff?
could she muff?
could we muff?
could you muff?
could they muff? 	could I be muffing?
could you be muffing?
could she be muffing?
could we be muffing?
could you be muffing?
could they be muffing? 	could I have muffed?
could you have muffed?
could she have muffed?
could we have muffed?
could you have muffed?
could they have muffed? 	could I have been muffing?
could you have been muffing?
could she have been muffing?
could we have been muffing?
could you have been muffing?
could they have been muffing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not muff?
could you not muff?
could she not muff?
could we not muff?
could you not muff?
could they not muff? 	could I not be muffing?
could you not be muffing?
could she not be muffing?
could we not be muffing?
could you not be muffing?
could they not be muffing? 	could I not have muffed?
could you not have muffed?
could she not have muffed?
could we not have muffed?
could you not have muffed?
could they not have muffed? 	could I not have been muffing?
could you not have been muffing?
could she not have been muffing?
could we not have been muffing?
could you not have been muffing?
could they not have been muffing?