I could denounce you could denounce he could denounce we could denounce you could denounce they could denounce
V-ing form
I could be denouncing you could be denouncing he could be denouncing we could be denouncing you could be denouncing they could be denouncing
Perfect
I could have denounced you could have denounced he could have denounced we could have denounced you could have denounced they could have denounced
V-ing perfect
I could have been denouncing you could have been denouncing he could have been denouncing we could have been denouncing you could have been denouncing they could have been denouncing
Negation
Simple form
I could not denounce you could not denounce he could not denounce we could not denounce you could not denounce they could not denounce
V-ing form
I could not be denouncing you could not be denouncing he could not be denouncing we could not be denouncing you could not be denouncing they could not be denouncing
Perfect
I could not have denounced you could not have denounced he could not have denounced we could not have denounced you could not have denounced they could not have denounced
V-ing perfect
I could not have been denouncing you could not have been denouncing he could not have been denouncing we could not have been denouncing you could not have been denouncing they could not have been denouncing
Interrogative form
Simple form
could I denounce? could you denounce? could he denounce? could we denounce? could you denounce? could they denounce?
V-ing form
could I be denouncing? could you be denouncing? could he be denouncing? could we be denouncing? could you be denouncing? could they be denouncing?
Perfect
could I have denounced? could you have denounced? could he have denounced? could we have denounced? could you have denounced? could they have denounced?
V-ing perfect
could I have been denouncing? could you have been denouncing? could he have been denouncing? could we have been denouncing? could you have been denouncing? could they have been denouncing?
Interro-negative form
Simple form
could I not denounce? could you not denounce? could he not denounce? could we not denounce? could you not denounce? could they not denounce?
V-ing form
could I not be denouncing? could you not be denouncing? could he not be denouncing? could we not be denouncing? could you not be denouncing? could they not be denouncing?
Perfect
could I not have denounced? could you not have denounced? could he not have denounced? could we not have denounced? could you not have denounced? could they not have denounced?
V-ing perfect
could I not have been denouncing? could you not have been denouncing? could he not have been denouncing? could we not have been denouncing? could you not have been denouncing? could they not have been denouncing?