English verb conjugation COULD ATTEST

Regular verb: attest - attested - attested

Affirmation

Simple form

I could attest
you could attest
he could attest
we could attest
you could attest
they could attest

V-ing form

I could be attesting
you could be attesting
he could be attesting
we could be attesting
you could be attesting
they could be attesting

Perfect

I could have attested
you could have attested
he could have attested
we could have attested
you could have attested
they could have attested

V-ing perfect

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

Negation

Simple form

I could not attest
you could not attest
he could not attest
we could not attest
you could not attest
they could not attest

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I attest?
could you attest?
could he attest?
could we attest?
could you attest?
could they attest?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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