I must flim-flam you must flim-flam he must flim-flam we must flim-flam you must flim-flam they must flim-flam
V-ing form
I must be flim-flaming you must be flim-flaming he must be flim-flaming we must be flim-flaming you must be flim-flaming they must be flim-flaming
Perfect
I must have flim-flamed you must have flim-flamed he must have flim-flamed we must have flim-flamed you must have flim-flamed they must have flim-flamed
V-ing perfect
I must have been flim-flaming you must have been flim-flaming he must have been flim-flaming we must have been flim-flaming you must have been flim-flaming they must have been flim-flaming
Negation
Simple form
I mustn't flim-flam you mustn't flim-flam he mustn't flim-flam we mustn't flim-flam you mustn't flim-flam they mustn't flim-flam
V-ing form
I mustn't be flim-flaming you mustn't be flim-flaming he mustn't be flim-flaming we mustn't be flim-flaming you mustn't be flim-flaming they mustn't be flim-flaming
Perfect
I mustn't have flim-flamed you mustn't have flim-flamed he mustn't have flim-flamed we mustn't have flim-flamed you mustn't have flim-flamed they mustn't have flim-flamed
V-ing perfect
I mustn't have been flim-flaming you mustn't have been flim-flaming he mustn't have been flim-flaming we mustn't have been flim-flaming you mustn't have been flim-flaming they mustn't have been flim-flaming
Interrogative form
Simple form
must I flim-flam? must you flim-flam? must he flim-flam? must we flim-flam? must you flim-flam? must they flim-flam?
V-ing form
must I be flim-flaming? must you be flim-flaming? must he be flim-flaming? must we be flim-flaming? must you be flim-flaming? must they be flim-flaming?
Perfect
must I have flim-flamed? must you have flim-flamed? must he have flim-flamed? must we have flim-flamed? must you have flim-flamed? must they have flim-flamed?
V-ing perfect
must I have been flim-flaming? must you have been flim-flaming? must he have been flim-flaming? must we have been flim-flaming? must you have been flim-flaming? must they have been flim-flaming?
Interro-negative form
Simple form
mustn't I flim-flam? mustn't you flim-flam? mustn't he flim-flam? mustn't we flim-flam? mustn't you flim-flam? mustn't they flim-flam?
V-ing form
mustn't I be flim-flaming? mustn't you be flim-flaming? mustn't he be flim-flaming? mustn't we be flim-flaming? mustn't you be flim-flaming? mustn't they be flim-flaming?
Perfect
mustn't I have flim-flamed? mustn't you have flim-flamed? mustn't he have flim-flamed? mustn't we have flim-flamed? mustn't you have flim-flamed? mustn't they have flim-flamed?
V-ing perfect
mustn't I have been flim-flaming? mustn't you have been flim-flaming? mustn't he have been flim-flaming? mustn't we have been flim-flaming? mustn't you have been flim-flaming? mustn't they have been flim-flaming?