I must originate you must originate he must originate we must originate you must originate they must originate
V-ing form
I must be originating you must be originating he must be originating we must be originating you must be originating they must be originating
Perfect
I must have originated you must have originated he must have originated we must have originated you must have originated they must have originated
V-ing perfect
I must have been originating you must have been originating he must have been originating we must have been originating you must have been originating they must have been originating
Negation
Simple form
I mustn't originate you mustn't originate he mustn't originate we mustn't originate you mustn't originate they mustn't originate
V-ing form
I mustn't be originating you mustn't be originating he mustn't be originating we mustn't be originating you mustn't be originating they mustn't be originating
Perfect
I mustn't have originated you mustn't have originated he mustn't have originated we mustn't have originated you mustn't have originated they mustn't have originated
V-ing perfect
I mustn't have been originating you mustn't have been originating he mustn't have been originating we mustn't have been originating you mustn't have been originating they mustn't have been originating
Interrogative form
Simple form
must I originate? must you originate? must he originate? must we originate? must you originate? must they originate?
V-ing form
must I be originating? must you be originating? must he be originating? must we be originating? must you be originating? must they be originating?
Perfect
must I have originated? must you have originated? must he have originated? must we have originated? must you have originated? must they have originated?
V-ing perfect
must I have been originating? must you have been originating? must he have been originating? must we have been originating? must you have been originating? must they have been originating?
Interro-negative form
Simple form
mustn't I originate? mustn't you originate? mustn't he originate? mustn't we originate? mustn't you originate? mustn't they originate?
V-ing form
mustn't I be originating? mustn't you be originating? mustn't he be originating? mustn't we be originating? mustn't you be originating? mustn't they be originating?
Perfect
mustn't I have originated? mustn't you have originated? mustn't he have originated? mustn't we have originated? mustn't you have originated? mustn't they have originated?
V-ing perfect
mustn't I have been originating? mustn't you have been originating? mustn't he have been originating? mustn't we have been originating? mustn't you have been originating? mustn't they have been originating?