could muss
Verbo regular: muss - mussed- mussed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't muss
you couldn't muss
he couldn't muss
we couldn't muss
you couldn't muss
they couldn't muss 	I couldn't be mussing
you couldn't be mussing
he couldn't be mussing
we couldn't be mussing
you couldn't be mussing
they couldn't be mussing	I couldn't have mussed
you couldn't have mussed
he couldn't have mussed
we couldn't have mussed
you couldn't have mussed
they couldn't have mussed	I couldn't have been mussing
you couldn't have been mussing
he couldn't have been mussing
we couldn't have been mussing
you couldn't have been mussing
they couldn't have been mussing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I muss?
couldn't you muss?
couldn't he muss?
couldn't we muss?
couldn't you muss?
couldn't they muss? 	couldn't I be mussing?
couldn't you be mussing?
couldn't he be mussing?
couldn't we be mussing?
couldn't you be mussing?
couldn't they be mussing? 	couldn't I have mussed?
couldn't you have mussed?
couldn't he have mussed?
couldn't we have mussed?
couldn't you have mussed?
couldn't they have mussed? 	couldn't I have been mussing?
couldn't you have been mussing?
couldn't he have been mussing?
couldn't we have been mussing?
couldn't you have been mussing?
couldn't they have been mussing?