I should counter you should counter he should counter we should counter you should counter they should counter
V-ing form
I should be countering you should be countering he should be countering we should be countering you should be countering they should be countering
Perfect
I should have countered you should have countered he should have countered we should have countered you should have countered they should have countered
V-ing perfect
I should have been countering you should have been countering he should have been countering we should have been countering you should have been countering they should have been countering
Negation
Simple form
I should not counter you should not counter he should not counter we should not counter you should not counter they should not counter
V-ing form
I should not be countering you should not be countering he should not be countering we should not be countering you should not be countering they should not be countering
Perfect
I should not have countered you should not have countered he should not have countered we should not have countered you should not have countered they should not have countered
V-ing perfect
I should not have been countering you should not have been countering he should not have been countering we should not have been countering you should not have been countering they should not have been countering
Interrogative form
Simple form
should I counter? should you counter? should he counter? should we counter? should you counter? should they counter?
V-ing form
should I be countering? should you be countering? should he be countering? should we be countering? should you be countering? should they be countering?
Perfect
should I have countered? should you have countered? should he have countered? should we have countered? should you have countered? should they have countered?
V-ing perfect
should I have been countering? should you have been countering? should he have been countering? should we have been countering? should you have been countering? should they have been countering?
Interro-negative form
Simple form
should I not counter? should you not counter? should he not counter? should we not counter? should you not counter? should they not counter?
V-ing form
should I not be countering? should you not be countering? should he not be countering? should we not be countering? should you not be countering? should they not be countering?
Perfect
should I not have countered? should you not have countered? should he not have countered? should we not have countered? should you not have countered? should they not have countered?
V-ing perfect
should I not have been countering? should you not have been countering? should he not have been countering? should we not have been countering? should you not have been countering? should they not have been countering?