English verb conjugation
COULD COUNTERMARCH

Regular verb: countermarch - countermarched - countermarched

Affirmation

Simple form	V-ing form
I could countermarch you could countermarch she could countermarch we could countermarch you could countermarch they could countermarch	I could be countermarching you could be countermarching she 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 she 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 she 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 she 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 she 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 she 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 she 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 she countermarch? could we countermarch? could you countermarch? could they countermarch?	could I be countermarching? could you be countermarching? could she 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 she 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 she 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 she 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 she 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 she 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 she have been countermarching? couldn't we have been countermarching? couldn't you have been countermarching? couldn't they have been countermarching?