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