English verb conjugation
CAN COUNTERMARCH

Regular verb: countermarch - countermarched - countermarched

Affirmation

Simple form	V-ing form
I can countermarch you can countermarch he can countermarch we can countermarch you can countermarch they can countermarch	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	V-ing 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	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	V-ing form
I cannot countermarch you cannot countermarch he cannot countermarch we cannot countermarch you cannot countermarch they cannot countermarch	I cannot be countermarching you cannot be countermarching he cannot be countermarching we cannot be countermarching you cannot be countermarching they cannot be countermarching
Perfect	V-ing perfect
I cannot have countermarched you cannot have countermarched he cannot have countermarched we cannot have countermarched you cannot have countermarched they cannot have countermarched	I cannot have been countermarching you cannot have been countermarching he cannot have been countermarching we cannot have been countermarching you cannot have been countermarching they cannot have been countermarching

Interrogative form

Simple form	V-ing form
can I countermarch? can you countermarch? can he countermarch? can we countermarch? can you countermarch? can they countermarch?	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	V-ing 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?	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	V-ing form
can I not countermarch? can you not countermarch? can he not countermarch? can we not countermarch? can you not countermarch? can they not countermarch?	can I not be countermarching? can you not be countermarching? can he not be countermarching? can we not be countermarching? can you not be countermarching? can they not be countermarching?
Perfect	V-ing perfect
can I not have countermarched? can you not have countermarched? can he not have countermarched? can we not have countermarched? can you not have countermarched? can they not have countermarched?	can I not have been countermarching? can you not have been countermarching? can he not have been countermarching? can we not have been countermarching? can you not have been countermarching? can they not have been countermarching?