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