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 couldn't attest
you couldn't attest
he couldn't attest
we couldn't attest
you couldn't attest
they couldn't attest

V-ing form

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

Perfect

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

V-ing perfect

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

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

V-ing form

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

Perfect

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

V-ing perfect

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

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