English verb conjugation COULD AUTHENTICATE

Regular verb: authenticate - authenticated - authenticated

Affirmation

Simple form

I could authenticate
you could authenticate
she could authenticate
we could authenticate
you could authenticate
they could authenticate

V-ing form

I could be authenticating
you could be authenticating
she could be authenticating
we could be authenticating
you could be authenticating
they could be authenticating

Perfect

I could have authenticated
you could have authenticated
she could have authenticated
we could have authenticated
you could have authenticated
they could have authenticated

V-ing perfect

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

Negation

Simple form

I could not authenticate
you could not authenticate
she could not authenticate
we could not authenticate
you could not authenticate
they could not authenticate

V-ing form

I could not be authenticating
you could not be authenticating
she could not be authenticating
we could not be authenticating
you could not be authenticating
they could not be authenticating

Perfect

I could not have authenticated
you could not have authenticated
she could not have authenticated
we could not have authenticated
you could not have authenticated
they could not have authenticated

V-ing perfect

I could not have been authenticating
you could not have been authenticating
she could not have been authenticating
we could not have been authenticating
you could not have been authenticating
they could not have been authenticating

Interrogative form

Simple form

could I authenticate?
could you authenticate?
could she authenticate?
could we authenticate?
could you authenticate?
could they authenticate?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

could I not authenticate?
could you not authenticate?
could she not authenticate?
could we not authenticate?
could you not authenticate?
could they not authenticate?

V-ing form

could I not be authenticating?
could you not be authenticating?
could she not be authenticating?
could we not be authenticating?
could you not be authenticating?
could they not be authenticating?

Perfect

could I not have authenticated?
could you not have authenticated?
could she not have authenticated?
could we not have authenticated?
could you not have authenticated?
could they not have authenticated?

V-ing perfect

could I not have been authenticating?
could you not have been authenticating?
could she not have been authenticating?
could we not have been authenticating?
could you not have been authenticating?
could they not have been authenticating?

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