English verb conjugation COULD KNIFE

Regular verb: knife - knifed - knifed

Affirmation

Simple form

I could knife
you could knife
he could knife
we could knife
you could knife
they could knife

V-ing form

I could be knifing
you could be knifing
he could be knifing
we could be knifing
you could be knifing
they could be knifing

Perfect

I could have knifed
you could have knifed
he could have knifed
we could have knifed
you could have knifed
they could have knifed

V-ing perfect

I could have been knifing
you could have been knifing
he could have been knifing
we could have been knifing
you could have been knifing
they could have been knifing

Negation

Simple form

I couldn't knife
you couldn't knife
he couldn't knife
we couldn't knife
you couldn't knife
they couldn't knife

V-ing form

I couldn't be knifing
you couldn't be knifing
he couldn't be knifing
we couldn't be knifing
you couldn't be knifing
they couldn't be knifing

Perfect

I couldn't have knifed
you couldn't have knifed
he couldn't have knifed
we couldn't have knifed
you couldn't have knifed
they couldn't have knifed

V-ing perfect

I couldn't have been knifing
you couldn't have been knifing
he couldn't have been knifing
we couldn't have been knifing
you couldn't have been knifing
they couldn't have been knifing

Interrogative form

Simple form

could I knife?
could you knife?
could he knife?
could we knife?
could you knife?
could they knife?

V-ing form

could I be knifing?
could you be knifing?
could he be knifing?
could we be knifing?
could you be knifing?
could they be knifing?

Perfect

could I have knifed?
could you have knifed?
could he have knifed?
could we have knifed?
could you have knifed?
could they have knifed?

V-ing perfect

could I have been knifing?
could you have been knifing?
could he have been knifing?
could we have been knifing?
could you have been knifing?
could they have been knifing?

Interro-negative form

Simple form

couldn't I knife?
couldn't you knife?
couldn't he knife?
couldn't we knife?
couldn't you knife?
couldn't they knife?

V-ing form

couldn't I be knifing?
couldn't you be knifing?
couldn't he be knifing?
couldn't we be knifing?
couldn't you be knifing?
couldn't they be knifing?

Perfect

couldn't I have knifed?
couldn't you have knifed?
couldn't he have knifed?
couldn't we have knifed?
couldn't you have knifed?
couldn't they have knifed?

V-ing perfect

couldn't I have been knifing?
couldn't you have been knifing?
couldn't he have been knifing?
couldn't we have been knifing?
couldn't you have been knifing?
couldn't they have been knifing?

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