I must govern you must govern she must govern we must govern you must govern they must govern
V-ing form
I must be governing you must be governing she must be governing we must be governing you must be governing they must be governing
Perfect
I must have governed you must have governed she must have governed we must have governed you must have governed they must have governed
V-ing perfect
I must have been governing you must have been governing she must have been governing we must have been governing you must have been governing they must have been governing
Negation
Simple form
I mustn't govern you mustn't govern she mustn't govern we mustn't govern you mustn't govern they mustn't govern
V-ing form
I mustn't be governing you mustn't be governing she mustn't be governing we mustn't be governing you mustn't be governing they mustn't be governing
Perfect
I mustn't have governed you mustn't have governed she mustn't have governed we mustn't have governed you mustn't have governed they mustn't have governed
V-ing perfect
I mustn't have been governing you mustn't have been governing she mustn't have been governing we mustn't have been governing you mustn't have been governing they mustn't have been governing
Interrogative form
Simple form
must I govern? must you govern? must she govern? must we govern? must you govern? must they govern?
V-ing form
must I be governing? must you be governing? must she be governing? must we be governing? must you be governing? must they be governing?
Perfect
must I have governed? must you have governed? must she have governed? must we have governed? must you have governed? must they have governed?
V-ing perfect
must I have been governing? must you have been governing? must she have been governing? must we have been governing? must you have been governing? must they have been governing?
Interro-negative form
Simple form
mustn't I govern? mustn't you govern? mustn't she govern? mustn't we govern? mustn't you govern? mustn't they govern?
V-ing form
mustn't I be governing? mustn't you be governing? mustn't she be governing? mustn't we be governing? mustn't you be governing? mustn't they be governing?
Perfect
mustn't I have governed? mustn't you have governed? mustn't she have governed? mustn't we have governed? mustn't you have governed? mustn't they have governed?
V-ing perfect
mustn't I have been governing? mustn't you have been governing? mustn't she have been governing? mustn't we have been governing? mustn't you have been governing? mustn't they have been governing?