I must disabuse you must disabuse she must disabuse we must disabuse you must disabuse they must disabuse
V-ing form
I must be disabusing you must be disabusing she must be disabusing we must be disabusing you must be disabusing they must be disabusing
Perfect
I must have disabused you must have disabused she must have disabused we must have disabused you must have disabused they must have disabused
V-ing perfect
I must have been disabusing you must have been disabusing she must have been disabusing we must have been disabusing you must have been disabusing they must have been disabusing
Negation
Simple form
I must not disabuse you must not disabuse she must not disabuse we must not disabuse you must not disabuse they must not disabuse
V-ing form
I must not be disabusing you must not be disabusing she must not be disabusing we must not be disabusing you must not be disabusing they must not be disabusing
Perfect
I must not have disabused you must not have disabused she must not have disabused we must not have disabused you must not have disabused they must not have disabused
V-ing perfect
I must not have been disabusing you must not have been disabusing she must not have been disabusing we must not have been disabusing you must not have been disabusing they must not have been disabusing
Interrogative form
Simple form
must I disabuse? must you disabuse? must she disabuse? must we disabuse? must you disabuse? must they disabuse?
V-ing form
must I be disabusing? must you be disabusing? must she be disabusing? must we be disabusing? must you be disabusing? must they be disabusing?
Perfect
must I have disabused? must you have disabused? must she have disabused? must we have disabused? must you have disabused? must they have disabused?
V-ing perfect
must I have been disabusing? must you have been disabusing? must she have been disabusing? must we have been disabusing? must you have been disabusing? must they have been disabusing?
Interro-negative form
Simple form
must I not disabuse? must you not disabuse? must she not disabuse? must we not disabuse? must you not disabuse? must they not disabuse?
V-ing form
must I not be disabusing? must you not be disabusing? must she not be disabusing? must we not be disabusing? must you not be disabusing? must they not be disabusing?
Perfect
must I not have disabused? must you not have disabused? must she not have disabused? must we not have disabused? must you not have disabused? must they not have disabused?
V-ing perfect
must I not have been disabusing? must you not have been disabusing? must she not have been disabusing? must we not have been disabusing? must you not have been disabusing? must they not have been disabusing?