I could renounce you could renounce he could renounce we could renounce you could renounce they could renounce
V-ing form
I could be renouncing you could be renouncing he could be renouncing we could be renouncing you could be renouncing they could be renouncing
Perfect
I could have renounced you could have renounced he could have renounced we could have renounced you could have renounced they could have renounced
V-ing perfect
I could have been renouncing you could have been renouncing he could have been renouncing we could have been renouncing you could have been renouncing they could have been renouncing
Negation
Simple form
I couldn't renounce you couldn't renounce he couldn't renounce we couldn't renounce you couldn't renounce they couldn't renounce
V-ing form
I couldn't be renouncing you couldn't be renouncing he couldn't be renouncing we couldn't be renouncing you couldn't be renouncing they couldn't be renouncing
Perfect
I couldn't have renounced you couldn't have renounced he couldn't have renounced we couldn't have renounced you couldn't have renounced they couldn't have renounced
V-ing perfect
I couldn't have been renouncing you couldn't have been renouncing he couldn't have been renouncing we couldn't have been renouncing you couldn't have been renouncing they couldn't have been renouncing
Interrogative form
Simple form
could I renounce? could you renounce? could he renounce? could we renounce? could you renounce? could they renounce?
V-ing form
could I be renouncing? could you be renouncing? could he be renouncing? could we be renouncing? could you be renouncing? could they be renouncing?
Perfect
could I have renounced? could you have renounced? could he have renounced? could we have renounced? could you have renounced? could they have renounced?
V-ing perfect
could I have been renouncing? could you have been renouncing? could he have been renouncing? could we have been renouncing? could you have been renouncing? could they have been renouncing?
Interro-negative form
Simple form
couldn't I renounce? couldn't you renounce? couldn't he renounce? couldn't we renounce? couldn't you renounce? couldn't they renounce?
V-ing form
couldn't I be renouncing? couldn't you be renouncing? couldn't he be renouncing? couldn't we be renouncing? couldn't you be renouncing? couldn't they be renouncing?
Perfect
couldn't I have renounced? couldn't you have renounced? couldn't he have renounced? couldn't we have renounced? couldn't you have renounced? couldn't they have renounced?
V-ing perfect
couldn't I have been renouncing? couldn't you have been renouncing? couldn't he have been renouncing? couldn't we have been renouncing? couldn't you have been renouncing? couldn't they have been renouncing?