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