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