Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I ought to prevent prevent you ought to prevent prevent he ought to prevent prevent we ought to prevent prevent you ought to prevent prevent they ought to prevent prevent
V-ing form
I ought to be prevent preventing you ought to be prevent preventing he ought to be prevent preventing we ought to be prevent preventing you ought to be prevent preventing they ought to be prevent preventing
Perfect
I ought to have prevent prevented you ought to have prevent prevented he ought to have prevent prevented we ought to have prevent prevented you ought to have prevent prevented they ought to have prevent prevented
V-ing perfect
I ought to have been prevent preventing you ought to have been prevent preventing he ought to have been prevent preventing we ought to have been prevent preventing you ought to have been prevent preventing they ought to have been prevent preventing
Negation
Simple form
I oughtn't to prevent prevent you oughtn't to prevent prevent he oughtn't to prevent prevent we oughtn't to prevent prevent you oughtn't to prevent prevent they oughtn't to prevent prevent
V-ing form
I oughtn't to be prevent preventing you oughtn't to be prevent preventing he oughtn't to be prevent preventing we oughtn't to be prevent preventing you oughtn't to be prevent preventing they oughtn't to be prevent preventing
Perfect
I oughtn't to have prevent prevented you oughtn't to have prevent prevented he oughtn't to have prevent prevented we oughtn't to have prevent prevented you oughtn't to have prevent prevented they oughtn't to have prevent prevented
V-ing perfect
I oughtn't to have been prevent preventing you oughtn't to have been prevent preventing he oughtn't to have been prevent preventing we oughtn't to have been prevent preventing you oughtn't to have been prevent preventing they oughtn't to have been prevent preventing
Interrogative form
Simple form
ought to I prevent prevent? ought to you prevent prevent? ought to he prevent prevent? ought to we prevent prevent? ought to you prevent prevent? ought to they prevent prevent?
V-ing form
ought to I be prevent preventing? ought to you be prevent preventing? ought to he be prevent preventing? ought to we be prevent preventing? ought to you be prevent preventing? ought to they be prevent preventing?
Perfect
ought to I have prevent prevented? ought to you have prevent prevented? ought to he have prevent prevented? ought to we have prevent prevented? ought to you have prevent prevented? ought to they have prevent prevented?
V-ing perfect
ought to I have been prevent preventing? ought to you have been prevent preventing? ought to he have been prevent preventing? ought to we have been prevent preventing? ought to you have been prevent preventing? ought to they have been prevent preventing?
Interro-negative form
Simple form
oughtn't I to prevent prevent? oughtn't you to prevent prevent? oughtn't he to prevent prevent? oughtn't we to prevent prevent? oughtn't you to prevent prevent? oughtn't they to prevent prevent?
V-ing form
oughtn't I to be prevent preventing? oughtn't you to be prevent preventing? oughtn't he to be prevent preventing? oughtn't we to be prevent preventing? oughtn't you to be prevent preventing? oughtn't they to be prevent preventing?
Perfect
oughtn't I to have prevent prevented? oughtn't you to have prevent prevented? oughtn't he to have prevent prevented? oughtn't we to have prevent prevented? oughtn't you to have prevent prevented? oughtn't they to have prevent prevented?
V-ing perfect
oughtn't I to have been prevent preventing? oughtn't you to have been prevent preventing? oughtn't he to have been prevent preventing? oughtn't we to have been prevent preventing? oughtn't you to have been prevent preventing? oughtn't they to have been prevent preventing?