could knacker
Verbo regular: knacker - knackered- knackered

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could knacker
you could knacker
he could knacker
we could knacker
you could knacker
they could knacker 	I could be knackering
you could be knackering
he could be knackering
we could be knackering
you could be knackering
they could be knackering	I could have knackered
you could have knackered
he could have knackered
we could have knackered
you could have knackered
they could have knackered	I could have been knackering
you could have been knackering
he could have been knackering
we could have been knackering
you could have been knackering
they could have been knackering	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not knacker
you could not knacker
he could not knacker
we could not knacker
you could not knacker
they could not knacker 	I could not be knackering
you could not be knackering
he could not be knackering
we could not be knackering
you could not be knackering
they could not be knackering	I could not have knackered
you could not have knackered
he could not have knackered
we could not have knackered
you could not have knackered
they could not have knackered	I could not have been knackering
you could not have been knackering
he could not have been knackering
we could not have been knackering
you could not have been knackering
they could not have been knackering	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I knacker?
could you knacker?
could he knacker?
could we knacker?
could you knacker?
could they knacker? 	could I be knackering?
could you be knackering?
could he be knackering?
could we be knackering?
could you be knackering?
could they be knackering? 	could I have knackered?
could you have knackered?
could he have knackered?
could we have knackered?
could you have knackered?
could they have knackered? 	could I have been knackering?
could you have been knackering?
could he have been knackering?
could we have been knackering?
could you have been knackering?
could they have been knackering? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not knacker?
could you not knacker?
could he not knacker?
could we not knacker?
could you not knacker?
could they not knacker? 	could I not be knackering?
could you not be knackering?
could he not be knackering?
could we not be knackering?
could you not be knackering?
could they not be knackering? 	could I not have knackered?
could you not have knackered?
could he not have knackered?
could we not have knackered?
could you not have knackered?
could they not have knackered? 	could I not have been knackering?
could you not have been knackering?
could he not have been knackering?
could we not have been knackering?
could you not have been knackering?
could they not have been knackering?