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