English verb conjugation
MUST SANCTION

Regular verb: sanction - sanctioned - sanctioned

Affirmation

Simple form	V-ing form
I must sanction you must sanction he must sanction we must sanction you must sanction they must sanction	I must be sanctioning you must be sanctioning he must be sanctioning we must be sanctioning you must be sanctioning they must be sanctioning
Perfect	V-ing perfect
I must have sanctioned you must have sanctioned he must have sanctioned we must have sanctioned you must have sanctioned they must have sanctioned	I must have been sanctioning you must have been sanctioning he must have been sanctioning we must have been sanctioning you must have been sanctioning they must have been sanctioning

Negation

Simple form	V-ing form
I mustn't sanction you mustn't sanction he mustn't sanction we mustn't sanction you mustn't sanction they mustn't sanction	I mustn't be sanctioning you mustn't be sanctioning he mustn't be sanctioning we mustn't be sanctioning you mustn't be sanctioning they mustn't be sanctioning
Perfect	V-ing perfect
I mustn't have sanctioned you mustn't have sanctioned he mustn't have sanctioned we mustn't have sanctioned you mustn't have sanctioned they mustn't have sanctioned	I mustn't have been sanctioning you mustn't have been sanctioning he mustn't have been sanctioning we mustn't have been sanctioning you mustn't have been sanctioning they mustn't have been sanctioning

Interrogative form

Simple form	V-ing form
must I sanction? must you sanction? must he sanction? must we sanction? must you sanction? must they sanction?	must I be sanctioning? must you be sanctioning? must he be sanctioning? must we be sanctioning? must you be sanctioning? must they be sanctioning?
Perfect	V-ing perfect
must I have sanctioned? must you have sanctioned? must he have sanctioned? must we have sanctioned? must you have sanctioned? must they have sanctioned?	must I have been sanctioning? must you have been sanctioning? must he have been sanctioning? must we have been sanctioning? must you have been sanctioning? must they have been sanctioning?

Interro-negative form

Simple form	V-ing form
mustn't I sanction? mustn't you sanction? mustn't he sanction? mustn't we sanction? mustn't you sanction? mustn't they sanction?	mustn't I be sanctioning? mustn't you be sanctioning? mustn't he be sanctioning? mustn't we be sanctioning? mustn't you be sanctioning? mustn't they be sanctioning?
Perfect	V-ing perfect
mustn't I have sanctioned? mustn't you have sanctioned? mustn't he have sanctioned? mustn't we have sanctioned? mustn't you have sanctioned? mustn't they have sanctioned?	mustn't I have been sanctioning? mustn't you have been sanctioning? mustn't he have been sanctioning? mustn't we have been sanctioning? mustn't you have been sanctioning? mustn't they have been sanctioning?