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