English verb conjugation COULD PROVE

Irregular verb: prove - proved - proven

Affirmation

Simple form

I could prove
you could prove
he could prove
we could prove
you could prove
they could prove

V-ing form

I could be proving
you could be proving
he could be proving
we could be proving
you could be proving
they could be proving

Perfect

I could have proven
you could have proven
he could have proven
we could have proven
you could have proven
they could have proven

V-ing perfect

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

Negation

Simple form

I couldn't prove
you couldn't prove
he couldn't prove
we couldn't prove
you couldn't prove
they couldn't prove

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I prove?
could you prove?
could he prove?
could we prove?
could you prove?
could they prove?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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