I may countermand you may countermand he may countermand we may countermand you may countermand they may countermand
V-ing form
I may be countermanding you may be countermanding he may be countermanding we may be countermanding you may be countermanding they may be countermanding
Perfect
I may have countermanded you may have countermanded he may have countermanded we may have countermanded you may have countermanded they may have countermanded
V-ing perfect
I may have been countermanding you may have been countermanding he may have been countermanding we may have been countermanding you may have been countermanding they may have been countermanding
Negation
Simple form
I mayn't countermand you mayn't countermand he mayn't countermand we mayn't countermand you mayn't countermand they mayn't countermand
V-ing form
I mayn't be countermanding you mayn't be countermanding he mayn't be countermanding we mayn't be countermanding you mayn't be countermanding they mayn't be countermanding
Perfect
I mayn't have countermanded you mayn't have countermanded he mayn't have countermanded we mayn't have countermanded you mayn't have countermanded they mayn't have countermanded
V-ing perfect
I mayn't have been countermanding you mayn't have been countermanding he mayn't have been countermanding we mayn't have been countermanding you mayn't have been countermanding they mayn't have been countermanding
Interrogative form
Simple form
may I countermand? may you countermand? may he countermand? may we countermand? may you countermand? may they countermand?
V-ing form
may I be countermanding? may you be countermanding? may he be countermanding? may we be countermanding? may you be countermanding? may they be countermanding?
Perfect
may I have countermanded? may you have countermanded? may he have countermanded? may we have countermanded? may you have countermanded? may they have countermanded?
V-ing perfect
may I have been countermanding? may you have been countermanding? may he have been countermanding? may we have been countermanding? may you have been countermanding? may they have been countermanding?
Interro-negative form
Simple form
mayn't I countermand? mayn't you countermand? mayn't he countermand? mayn't we countermand? mayn't you countermand? mayn't they countermand?
V-ing form
mayn't I be countermanding? mayn't you be countermanding? mayn't he be countermanding? mayn't we be countermanding? mayn't you be countermanding? mayn't they be countermanding?
Perfect
mayn't I have countermanded? mayn't you have countermanded? mayn't he have countermanded? mayn't we have countermanded? mayn't you have countermanded? mayn't they have countermanded?
V-ing perfect
mayn't I have been countermanding? mayn't you have been countermanding? mayn't he have been countermanding? mayn't we have been countermanding? mayn't you have been countermanding? mayn't they have been countermanding?