English verb conjugation COULD NULL

Regular verb: null - nulled - nulled

Affirmation

Simple form

I could null
you could null
he could null
we could null
you could null
they could null

V-ing form

I could be nulling
you could be nulling
he could be nulling
we could be nulling
you could be nulling
they could be nulling

Perfect

I could have nulled
you could have nulled
he could have nulled
we could have nulled
you could have nulled
they could have nulled

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I null?
could you null?
could he null?
could we null?
could you null?
could they null?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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