English verb conjugation
MUST DECREE

Regular verb: decree - decreed - decreed

Affirmation

Simple form	V-ing form
I must decree you must decree he must decree we must decree you must decree they must decree	I must be decreeing you must be decreeing he must be decreeing we must be decreeing you must be decreeing they must be decreeing
Perfect	V-ing perfect
I must have decreed you must have decreed he must have decreed we must have decreed you must have decreed they must have decreed	I must have been decreeing you must have been decreeing he must have been decreeing we must have been decreeing you must have been decreeing they must have been decreeing

Negation

Simple form	V-ing form
I mustn't decree you mustn't decree he mustn't decree we mustn't decree you mustn't decree they mustn't decree	I mustn't be decreeing you mustn't be decreeing he mustn't be decreeing we mustn't be decreeing you mustn't be decreeing they mustn't be decreeing
Perfect	V-ing perfect
I mustn't have decreed you mustn't have decreed he mustn't have decreed we mustn't have decreed you mustn't have decreed they mustn't have decreed	I mustn't have been decreeing you mustn't have been decreeing he mustn't have been decreeing we mustn't have been decreeing you mustn't have been decreeing they mustn't have been decreeing

Interrogative form

Simple form	V-ing form
must I decree? must you decree? must he decree? must we decree? must you decree? must they decree?	must I be decreeing? must you be decreeing? must he be decreeing? must we be decreeing? must you be decreeing? must they be decreeing?
Perfect	V-ing perfect
must I have decreed? must you have decreed? must he have decreed? must we have decreed? must you have decreed? must they have decreed?	must I have been decreeing? must you have been decreeing? must he have been decreeing? must we have been decreeing? must you have been decreeing? must they have been decreeing?

Interro-negative form

Simple form	V-ing form
mustn't I decree? mustn't you decree? mustn't he decree? mustn't we decree? mustn't you decree? mustn't they decree?	mustn't I be decreeing? mustn't you be decreeing? mustn't he be decreeing? mustn't we be decreeing? mustn't you be decreeing? mustn't they be decreeing?
Perfect	V-ing perfect
mustn't I have decreed? mustn't you have decreed? mustn't he have decreed? mustn't we have decreed? mustn't you have decreed? mustn't they have decreed?	mustn't I have been decreeing? mustn't you have been decreeing? mustn't he have been decreeing? mustn't we have been decreeing? mustn't you have been decreeing? mustn't they have been decreeing?