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