could muss
Verbo regular: muss - mussed- mussed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could muss
you could muss
he could muss
we could muss
you could muss
they could muss 	I could be mussing
you could be mussing
he could be mussing
we could be mussing
you could be mussing
they could be mussing	I could have mussed
you could have mussed
he could have mussed
we could have mussed
you could have mussed
they could have mussed	I could have been mussing
you could have been mussing
he could have been mussing
we could have been mussing
you could have been mussing
they could have been mussing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not muss
you could not muss
he could not muss
we could not muss
you could not muss
they could not muss 	I could not be mussing
you could not be mussing
he could not be mussing
we could not be mussing
you could not be mussing
they could not be mussing	I could not have mussed
you could not have mussed
he could not have mussed
we could not have mussed
you could not have mussed
they could not have mussed	I could not have been mussing
you could not have been mussing
he could not have been mussing
we could not have been mussing
you could not have been mussing
they could not have been mussing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I muss?
could you muss?
could he muss?
could we muss?
could you muss?
could they muss? 	could I be mussing?
could you be mussing?
could he be mussing?
could we be mussing?
could you be mussing?
could they be mussing? 	could I have mussed?
could you have mussed?
could he have mussed?
could we have mussed?
could you have mussed?
could they have mussed? 	could I have been mussing?
could you have been mussing?
could he have been mussing?
could we have been mussing?
could you have been mussing?
could they have been mussing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not muss?
could you not muss?
could he not muss?
could we not muss?
could you not muss?
could they not muss? 	could I not be mussing?
could you not be mussing?
could he not be mussing?
could we not be mussing?
could you not be mussing?
could they not be mussing? 	could I not have mussed?
could you not have mussed?
could he not have mussed?
could we not have mussed?
could you not have mussed?
could they not have mussed? 	could I not have been mussing?
could you not have been mussing?
could he not have been mussing?
could we not have been mussing?
could you not have been mussing?
could they not have been mussing?