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