can knacker
Verbo regular: knacker - knackered- knackered

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

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I cannot knacker
you cannot knacker
she cannot knacker
we cannot knacker
you cannot knacker
they cannot knacker 	I cannot be knackering
you cannot be knackering
she cannot be knackering
we cannot be knackering
you cannot be knackering
they cannot be knackering	I cannot have knackered
you cannot have knackered
she cannot have knackered
we cannot have knackered
you cannot have knackered
they cannot have knackered	I cannot have been knackering
you cannot have been knackering
she cannot have been knackering
we cannot have been knackering
you cannot have been knackering
they cannot have been knackering	

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

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