I must castrate you must castrate she must castrate we must castrate you must castrate they must castrate
V-ing form
I must be castrating you must be castrating she must be castrating we must be castrating you must be castrating they must be castrating
Perfect
I must have castrated you must have castrated she 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 she 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 she 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 she 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 she 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 she 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 she castrate? must we castrate? must you castrate? must they castrate?
V-ing form
must I be castrating? must you be castrating? must she be castrating? must we be castrating? must you be castrating? must they be castrating?
Perfect
must I have castrated? must you have castrated? must she 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 she 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 she 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 she 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 she 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 she have been castrating? mustn't we have been castrating? mustn't you have been castrating? mustn't they have been castrating?