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