English verb conjugation
COULD COUNTER

Regular verb: counter - countered - countered

Affirmation

Simple form	V-ing form
I could counter you could counter she could counter we could counter you could counter they could counter	I could be countering you could be countering she could be countering we could be countering you could be countering they could be countering
Perfect	V-ing perfect
I could have countered you could have countered she could have countered we could have countered you could have countered they could have countered	I could have been countering you could have been countering she could have been countering we could have been countering you could have been countering they could have been countering

Negation

Simple form	V-ing form
I couldn't counter you couldn't counter she couldn't counter we couldn't counter you couldn't counter they couldn't counter	I couldn't be countering you couldn't be countering she couldn't be countering we couldn't be countering you couldn't be countering they couldn't be countering
Perfect	V-ing perfect
I couldn't have countered you couldn't have countered she couldn't have countered we couldn't have countered you couldn't have countered they couldn't have countered	I couldn't have been countering you couldn't have been countering she couldn't have been countering we couldn't have been countering you couldn't have been countering they couldn't have been countering

Interrogative form

Simple form	V-ing form
could I counter? could you counter? could she counter? could we counter? could you counter? could they counter?	could I be countering? could you be countering? could she be countering? could we be countering? could you be countering? could they be countering?
Perfect	V-ing perfect
could I have countered? could you have countered? could she have countered? could we have countered? could you have countered? could they have countered?	could I have been countering? could you have been countering? could she have been countering? could we have been countering? could you have been countering? could they have been countering?

Interro-negative form

Simple form	V-ing form
couldn't I counter? couldn't you counter? couldn't she counter? couldn't we counter? couldn't you counter? couldn't they counter?	couldn't I be countering? couldn't you be countering? couldn't she be countering? couldn't we be countering? couldn't you be countering? couldn't they be countering?
Perfect	V-ing perfect
couldn't I have countered? couldn't you have countered? couldn't she have countered? couldn't we have countered? couldn't you have countered? couldn't they have countered?	couldn't I have been countering? couldn't you have been countering? couldn't she have been countering? couldn't we have been countering? couldn't you have been countering? couldn't they have been countering?