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