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