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 couldn't knacker you couldn't knacker she couldn't knacker we couldn't knacker you couldn't knacker they couldn't knacker	I couldn't be knackering you couldn't be knackering she couldn't be knackering we couldn't be knackering you couldn't be knackering they couldn't be knackering
Perfect	V-ing perfect
I couldn't have knackered you couldn't have knackered she couldn't have knackered we couldn't have knackered you couldn't have knackered they couldn't have knackered	I couldn't have been knackering you couldn't have been knackering she couldn't have been knackering we couldn't have been knackering you couldn't have been knackering they couldn't 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
couldn't I knacker? couldn't you knacker? couldn't she knacker? couldn't we knacker? couldn't you knacker? couldn't they knacker?	couldn't I be knackering? couldn't you be knackering? couldn't she be knackering? couldn't we be knackering? couldn't you be knackering? couldn't they be knackering?
Perfect	V-ing perfect
couldn't I have knackered? couldn't you have knackered? couldn't she have knackered? couldn't we have knackered? couldn't you have knackered? couldn't they have knackered?	couldn't I have been knackering? couldn't you have been knackering? couldn't she have been knackering? couldn't we have been knackering? couldn't you have been knackering? couldn't they have been knackering?