English verb conjugation
COULD KNACKER

Regular verb: knacker - knackered - knackered

Affirmation

Simple form	V-ing form
I could knacker you could knacker she could knacker we could knacker you could knacker they could knacker	I could be knackering you could be knackering she could be knackering we could be knackering you could be knackering they could be knackering
Perfect	V-ing perfect
I could have knackered you could have knackered she 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 she could have been knackering we could have been knackering you could have been knackering they could have been knackering

Negation

Simple form	V-ing form
I could not knacker you could not knacker she 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 she could not be knackering we could not be knackering you could not be knackering they could not be knackering
Perfect	V-ing perfect
I could not have knackered you could not have knackered she 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 she could not have been knackering we could not have been knackering you could not have been knackering they could not have been knackering

Interrogative form

Simple form	V-ing form
could I knacker? could you knacker? could she knacker? could we knacker? could you knacker? could they knacker?	could I be knackering? could you be knackering? could she be knackering? could we be knackering? could you be knackering? could they be knackering?
Perfect	V-ing perfect
could I have knackered? could you have knackered? could she 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 she have been knackering? could we have been knackering? could you have been knackering? could they have been knackering?

Interro-negative form

Simple form	V-ing form
could I not knacker? could you not knacker? could she 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 she not be knackering? could we not be knackering? could you not be knackering? could they not be knackering?
Perfect	V-ing perfect
could I not have knackered? could you not have knackered? could she 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 she not have been knackering? could we not have been knackering? could you not have been knackering? could they not have been knackering?