English verb conjugation
COULD COUNTERMARCH

Regular verb: countermarch - countermarched - countermarched

Affirmation

Simple form	V-ing form
I could countermarch you could countermarch he could countermarch we could countermarch you could countermarch they could countermarch	I could be countermarching you could be countermarching he could be countermarching we could be countermarching you could be countermarching they could be countermarching
Perfect	V-ing perfect
I could have countermarched you could have countermarched he could have countermarched we could have countermarched you could have countermarched they could have countermarched	I could have been countermarching you could have been countermarching he could have been countermarching we could have been countermarching you could have been countermarching they could have been countermarching

Negation

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

Interrogative form

Simple form	V-ing form
could I countermarch? could you countermarch? could he countermarch? could we countermarch? could you countermarch? could they countermarch?	could I be countermarching? could you be countermarching? could he be countermarching? could we be countermarching? could you be countermarching? could they be countermarching?
Perfect	V-ing perfect
could I have countermarched? could you have countermarched? could he have countermarched? could we have countermarched? could you have countermarched? could they have countermarched?	could I have been countermarching? could you have been countermarching? could he have been countermarching? could we have been countermarching? could you have been countermarching? could they have been countermarching?

Interro-negative form

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