English verb conjugation COULD WITNESS

Regular verb: witness - witnessed - witnessed

Affirmation

Simple form

I could witness
you could witness
she could witness
we could witness
you could witness
they could witness

V-ing form

I could be witnessing
you could be witnessing
she could be witnessing
we could be witnessing
you could be witnessing
they could be witnessing

Perfect

I could have witnessed
you could have witnessed
she could have witnessed
we could have witnessed
you could have witnessed
they could have witnessed

V-ing perfect

I could have been witnessing
you could have been witnessing
she could have been witnessing
we could have been witnessing
you could have been witnessing
they could have been witnessing

Negation

Simple form

I couldn't witness
you couldn't witness
she couldn't witness
we couldn't witness
you couldn't witness
they couldn't witness

V-ing form

I couldn't be witnessing
you couldn't be witnessing
she couldn't be witnessing
we couldn't be witnessing
you couldn't be witnessing
they couldn't be witnessing

Perfect

I couldn't have witnessed
you couldn't have witnessed
she couldn't have witnessed
we couldn't have witnessed
you couldn't have witnessed
they couldn't have witnessed

V-ing perfect

I couldn't have been witnessing
you couldn't have been witnessing
she couldn't have been witnessing
we couldn't have been witnessing
you couldn't have been witnessing
they couldn't have been witnessing

Interrogative form

Simple form

could I witness?
could you witness?
could she witness?
could we witness?
could you witness?
could they witness?

V-ing form

could I be witnessing?
could you be witnessing?
could she be witnessing?
could we be witnessing?
could you be witnessing?
could they be witnessing?

Perfect

could I have witnessed?
could you have witnessed?
could she have witnessed?
could we have witnessed?
could you have witnessed?
could they have witnessed?

V-ing perfect

could I have been witnessing?
could you have been witnessing?
could she have been witnessing?
could we have been witnessing?
could you have been witnessing?
could they have been witnessing?

Interro-negative form

Simple form

couldn't I witness?
couldn't you witness?
couldn't she witness?
couldn't we witness?
couldn't you witness?
couldn't they witness?

V-ing form

couldn't I be witnessing?
couldn't you be witnessing?
couldn't she be witnessing?
couldn't we be witnessing?
couldn't you be witnessing?
couldn't they be witnessing?

Perfect

couldn't I have witnessed?
couldn't you have witnessed?
couldn't she have witnessed?
couldn't we have witnessed?
couldn't you have witnessed?
couldn't they have witnessed?

V-ing perfect

couldn't I have been witnessing?
couldn't you have been witnessing?
couldn't she have been witnessing?
couldn't we have been witnessing?
couldn't you have been witnessing?
couldn't they have been witnessing?

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