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