I can march you can march he can march we can march you can march they can march
V-ing form
I can be marching you can be marching he can be marching we can be marching you can be marching they can be marching
Perfect
I can have marched you can have marched he can have marched we can have marched you can have marched they can have marched
V-ing perfect
I can have been marching you can have been marching he can have been marching we can have been marching you can have been marching they can have been marching
Negation
Simple form
I can't march you can't march he can't march we can't march you can't march they can't march
V-ing form
I can't be marching you can't be marching he can't be marching we can't be marching you can't be marching they can't be marching
Perfect
I can't have marched you can't have marched he can't have marched we can't have marched you can't have marched they can't have marched
V-ing perfect
I can't have been marching you can't have been marching he can't have been marching we can't have been marching you can't have been marching they can't have been marching
Interrogative form
Simple form
can I march? can you march? can he march? can we march? can you march? can they march?
V-ing form
can I be marching? can you be marching? can he be marching? can we be marching? can you be marching? can they be marching?
Perfect
can I have marched? can you have marched? can he have marched? can we have marched? can you have marched? can they have marched?
V-ing perfect
can I have been marching? can you have been marching? can he have been marching? can we have been marching? can you have been marching? can they have been marching?
Interro-negative form
Simple form
can't I march? can't you march? can't he march? can't we march? can't you march? can't they march?
V-ing form
can't I be marching? can't you be marching? can't he be marching? can't we be marching? can't you be marching? can't they be marching?
Perfect
can't I have marched? can't you have marched? can't he have marched? can't we have marched? can't you have marched? can't they have marched?
V-ing perfect
can't I have been marching? can't you have been marching? can't he have been marching? can't we have been marching? can't you have been marching? can't they have been marching?