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 couldn't countermarch you couldn't countermarch he couldn't countermarch we couldn't countermarch you couldn't countermarch they couldn't countermarch	I couldn't be countermarching you couldn't be countermarching he couldn't be countermarching we couldn't be countermarching you couldn't be countermarching they couldn't be countermarching
Perfect	V-ing perfect
I couldn't have countermarched you couldn't have countermarched he couldn't have countermarched we couldn't have countermarched you couldn't have countermarched they couldn't have countermarched	I couldn't have been countermarching you couldn't have been countermarching he couldn't have been countermarching we couldn't have been countermarching you couldn't have been countermarching they couldn't 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
couldn't I countermarch? couldn't you countermarch? couldn't he countermarch? couldn't we countermarch? couldn't you countermarch? couldn't they countermarch?	couldn't I be countermarching? couldn't you be countermarching? couldn't he be countermarching? couldn't we be countermarching? couldn't you be countermarching? couldn't they be countermarching?
Perfect	V-ing perfect
couldn't I have countermarched? couldn't you have countermarched? couldn't he have countermarched? couldn't we have countermarched? couldn't you have countermarched? couldn't they have countermarched?	couldn't I have been countermarching? couldn't you have been countermarching? couldn't he have been countermarching? couldn't we have been countermarching? couldn't you have been countermarching? couldn't they have been countermarching?