ought to prove
Irregular verb: prove - proved- proven

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to prove
you ought to prove
he ought to prove
we ought to prove
you ought to prove
they ought to prove 	I ought to be proving
you ought to be proving
he ought to be proving
we ought to be proving
you ought to be proving
they ought to be proving	I ought to have proven
you ought to have proven
he ought to have proven
we ought to have proven
you ought to have proven
they ought to have proven	I ought to have been proving
you ought to have been proving
he ought to have been proving
we ought to have been proving
you ought to have been proving
they ought to have been proving	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to prove
you oughtn't to prove
he oughtn't to prove
we oughtn't to prove
you oughtn't to prove
they oughtn't to prove 	I oughtn't to be proving
you oughtn't to be proving
he oughtn't to be proving
we oughtn't to be proving
you oughtn't to be proving
they oughtn't to be proving	I oughtn't to have proven
you oughtn't to have proven
he oughtn't to have proven
we oughtn't to have proven
you oughtn't to have proven
they oughtn't to have proven	I oughtn't to have been proving
you oughtn't to have been proving
he oughtn't to have been proving
we oughtn't to have been proving
you oughtn't to have been proving
they oughtn't to have been proving	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I prove?
ought to you prove?
ought to he prove?
ought to we prove?
ought to you prove?
ought to they prove? 	ought to I be proving?
ought to you be proving?
ought to he be proving?
ought to we be proving?
ought to you be proving?
ought to they be proving? 	ought to I have proven?
ought to you have proven?
ought to he have proven?
ought to we have proven?
ought to you have proven?
ought to they have proven? 	ought to I have been proving?
ought to you have been proving?
ought to he have been proving?
ought to we have been proving?
ought to you have been proving?
ought to they have been proving? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to prove?
oughtn't you to prove?
oughtn't he to prove?
oughtn't we to prove?
oughtn't you to prove?
oughtn't they to prove? 	oughtn't I to be proving?
oughtn't you to be proving?
oughtn't he to be proving?
oughtn't we to be proving?
oughtn't you to be proving?
oughtn't they to be proving? 	oughtn't I to have proven?
oughtn't you to have proven?
oughtn't he to have proven?
oughtn't we to have proven?
oughtn't you to have proven?
oughtn't they to have proven? 	oughtn't I to have been proving?
oughtn't you to have been proving?
oughtn't he to have been proving?
oughtn't we to have been proving?
oughtn't you to have been proving?
oughtn't they to have been proving?