could shred
Verbo regular: shred - shredded- shredded

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could shred
you could shred
she could shred
we could shred
you could shred
they could shred 	I could be shredding
you could be shredding
she could be shredding
we could be shredding
you could be shredding
they could be shredding	I could have shredded
you could have shredded
she could have shredded
we could have shredded
you could have shredded
they could have shredded	I could have been shredding
you could have been shredding
she could have been shredding
we could have been shredding
you could have been shredding
they could have been shredding	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not shred
you could not shred
she could not shred
we could not shred
you could not shred
they could not shred 	I could not be shredding
you could not be shredding
she could not be shredding
we could not be shredding
you could not be shredding
they could not be shredding	I could not have shredded
you could not have shredded
she could not have shredded
we could not have shredded
you could not have shredded
they could not have shredded	I could not have been shredding
you could not have been shredding
she could not have been shredding
we could not have been shredding
you could not have been shredding
they could not have been shredding	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I shred?
could you shred?
could she shred?
could we shred?
could you shred?
could they shred? 	could I be shredding?
could you be shredding?
could she be shredding?
could we be shredding?
could you be shredding?
could they be shredding? 	could I have shredded?
could you have shredded?
could she have shredded?
could we have shredded?
could you have shredded?
could they have shredded? 	could I have been shredding?
could you have been shredding?
could she have been shredding?
could we have been shredding?
could you have been shredding?
could they have been shredding? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not shred?
could you not shred?
could she not shred?
could we not shred?
could you not shred?
could they not shred? 	could I not be shredding?
could you not be shredding?
could she not be shredding?
could we not be shredding?
could you not be shredding?
could they not be shredding? 	could I not have shredded?
could you not have shredded?
could she not have shredded?
could we not have shredded?
could you not have shredded?
could they not have shredded? 	could I not have been shredding?
could you not have been shredding?
could she not have been shredding?
could we not have been shredding?
could you not have been shredding?
could they not have been shredding?