could sheaf
Verbo regular: sheaf - sheafed- sheafed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could sheaf
you could sheaf
he could sheaf
we could sheaf
you could sheaf
they could sheaf 	I could be sheafing
you could be sheafing
he could be sheafing
we could be sheafing
you could be sheafing
they could be sheafing	I could have sheafed
you could have sheafed
he could have sheafed
we could have sheafed
you could have sheafed
they could have sheafed	I could have been sheafing
you could have been sheafing
he could have been sheafing
we could have been sheafing
you could have been sheafing
they could have been sheafing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not sheaf
you could not sheaf
he could not sheaf
we could not sheaf
you could not sheaf
they could not sheaf 	I could not be sheafing
you could not be sheafing
he could not be sheafing
we could not be sheafing
you could not be sheafing
they could not be sheafing	I could not have sheafed
you could not have sheafed
he could not have sheafed
we could not have sheafed
you could not have sheafed
they could not have sheafed	I could not have been sheafing
you could not have been sheafing
he could not have been sheafing
we could not have been sheafing
you could not have been sheafing
they could not have been sheafing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I sheaf?
could you sheaf?
could he sheaf?
could we sheaf?
could you sheaf?
could they sheaf? 	could I be sheafing?
could you be sheafing?
could he be sheafing?
could we be sheafing?
could you be sheafing?
could they be sheafing? 	could I have sheafed?
could you have sheafed?
could he have sheafed?
could we have sheafed?
could you have sheafed?
could they have sheafed? 	could I have been sheafing?
could you have been sheafing?
could he have been sheafing?
could we have been sheafing?
could you have been sheafing?
could they have been sheafing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not sheaf?
could you not sheaf?
could he not sheaf?
could we not sheaf?
could you not sheaf?
could they not sheaf? 	could I not be sheafing?
could you not be sheafing?
could he not be sheafing?
could we not be sheafing?
could you not be sheafing?
could they not be sheafing? 	could I not have sheafed?
could you not have sheafed?
could he not have sheafed?
could we not have sheafed?
could you not have sheafed?
could they not have sheafed? 	could I not have been sheafing?
could you not have been sheafing?
could he not have been sheafing?
could we not have been sheafing?
could you not have been sheafing?
could they not have been sheafing?