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 ought not to prevent prevent you ought not to prevent prevent he ought not to prevent prevent we ought not to prevent prevent you ought not to prevent prevent they ought not to prevent prevent
V-ing form
I ought not to prevent preventing you ought not to prevent preventing he ought not to prevent preventing we ought not to prevent preventing you ought not to prevent preventing they ought not to prevent preventing
Perfect
I ought not to have prevent prevented you ought not to have prevent prevented he ought not to have prevent prevented we ought not to have prevent prevented you ought not to have prevent prevented they ought not to have prevent prevented
V-ing perfect
I ought not to have been prevent preventing you ought not to have been prevent preventing he ought not to have been prevent preventing we ought not to have been prevent preventing you ought not to have been prevent preventing they ought not 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
ought I not to prevent prevent? ought you not to prevent prevent? ought he not to prevent prevent? ought we not to prevent prevent? ought you not to prevent prevent? ought they not to prevent prevent?
V-ing form
ought I not to be prevent preventing? ought you not to be prevent preventing? ought he not to be prevent preventing? ought we not to be prevent preventing? ought you not to be prevent preventing? ought they not to be prevent preventing?
Perfect
ought I not to have prevent prevented? ought you not to have prevent prevented? ought he not to have prevent prevented? ought we not to have prevent prevented? ought you not to have prevent prevented? ought they not to have prevent prevented?
V-ing perfect
ought I not to have been prevent preventing? ought you not to have been prevent preventing? ought he not to have been prevent preventing? ought we not to have been prevent preventing? ought you not to have been prevent preventing? ought they not to have been prevent preventing?