English verb conjugation COULD CORROBORATE

Regular verb: corroborate - corroborated - corroborated

Affirmation

Simple form

I could corroborate
you could corroborate
he could corroborate
we could corroborate
you could corroborate
they could corroborate

V-ing form

I could be corroborating
you could be corroborating
he could be corroborating
we could be corroborating
you could be corroborating
they could be corroborating

Perfect

I could have corroborated
you could have corroborated
he could have corroborated
we could have corroborated
you could have corroborated
they could have corroborated

V-ing perfect

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

Negation

Simple form

I could not corroborate
you could not corroborate
he could not corroborate
we could not corroborate
you could not corroborate
they could not corroborate

V-ing form

I could not be corroborating
you could not be corroborating
he could not be corroborating
we could not be corroborating
you could not be corroborating
they could not be corroborating

Perfect

I could not have corroborated
you could not have corroborated
he could not have corroborated
we could not have corroborated
you could not have corroborated
they could not have corroborated

V-ing perfect

I could not have been corroborating
you could not have been corroborating
he could not have been corroborating
we could not have been corroborating
you could not have been corroborating
they could not have been corroborating

Interrogative form

Simple form

could I corroborate?
could you corroborate?
could he corroborate?
could we corroborate?
could you corroborate?
could they corroborate?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

could I not corroborate?
could you not corroborate?
could he not corroborate?
could we not corroborate?
could you not corroborate?
could they not corroborate?

V-ing form

could I not be corroborating?
could you not be corroborating?
could he not be corroborating?
could we not be corroborating?
could you not be corroborating?
could they not be corroborating?

Perfect

could I not have corroborated?
could you not have corroborated?
could he not have corroborated?
could we not have corroborated?
could you not have corroborated?
could they not have corroborated?

V-ing perfect

could I not have been corroborating?
could you not have been corroborating?
could he not have been corroborating?
could we not have been corroborating?
could you not have been corroborating?
could they not have been corroborating?

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