I must instigate you must instigate she must instigate we must instigate you must instigate they must instigate
V-ing form
I must be instigating you must be instigating she must be instigating we must be instigating you must be instigating they must be instigating
Perfect
I must have instigated you must have instigated she 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 she 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 she 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 she 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 she 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 she 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 she instigate? must we instigate? must you instigate? must they instigate?
V-ing form
must I be instigating? must you be instigating? must she be instigating? must we be instigating? must you be instigating? must they be instigating?
Perfect
must I have instigated? must you have instigated? must she 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 she 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 she 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 she 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 she 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 she have been instigating? mustn't we have been instigating? mustn't you have been instigating? mustn't they have been instigating?