English verb conjugation COULD KNELL

Regular verb: knell - knelled - knelled

Affirmation

Simple form

I could knell
you could knell
he could knell
we could knell
you could knell
they could knell

V-ing form

I could be knelling
you could be knelling
he could be knelling
we could be knelling
you could be knelling
they could be knelling

Perfect

I could have knelled
you could have knelled
he could have knelled
we could have knelled
you could have knelled
they could have knelled

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I knell?
could you knell?
could he knell?
could we knell?
could you knell?
could they knell?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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