English verb conjugation COULD PROOF

Regular verb: proof - proofed - proofed

Affirmation

Simple form

I could proof
you could proof
he could proof
we could proof
you could proof
they could proof

V-ing form

I could be proofing
you could be proofing
he could be proofing
we could be proofing
you could be proofing
they could be proofing

Perfect

I could have proofed
you could have proofed
he could have proofed
we could have proofed
you could have proofed
they could have proofed

V-ing perfect

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

Negation

Simple form

I could not proof
you could not proof
he could not proof
we could not proof
you could not proof
they could not proof

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I proof?
could you proof?
could he proof?
could we proof?
could you proof?
could they proof?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Page top