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