I could annul you could annul he could annul we could annul you could annul they could annul
V-ing form
I could be annulling you could be annulling he could be annulling we could be annulling you could be annulling they could be annulling
Perfect
I could have annulled you could have annulled he could have annulled we could have annulled you could have annulled they could have annulled
V-ing perfect
I could have been annulling you could have been annulling he could have been annulling we could have been annulling you could have been annulling they could have been annulling
Negation
Simple form
I could not annul you could not annul he could not annul we could not annul you could not annul they could not annul
V-ing form
I could not be annulling you could not be annulling he could not be annulling we could not be annulling you could not be annulling they could not be annulling
Perfect
I could not have annulled you could not have annulled he could not have annulled we could not have annulled you could not have annulled they could not have annulled
V-ing perfect
I could not have been annulling you could not have been annulling he could not have been annulling we could not have been annulling you could not have been annulling they could not have been annulling
Interrogative form
Simple form
could I annul? could you annul? could he annul? could we annul? could you annul? could they annul?
V-ing form
could I be annulling? could you be annulling? could he be annulling? could we be annulling? could you be annulling? could they be annulling?
Perfect
could I have annulled? could you have annulled? could he have annulled? could we have annulled? could you have annulled? could they have annulled?
V-ing perfect
could I have been annulling? could you have been annulling? could he have been annulling? could we have been annulling? could you have been annulling? could they have been annulling?
Interro-negative form
Simple form
could I not annul? could you not annul? could he not annul? could we not annul? could you not annul? could they not annul?
V-ing form
could I not be annulling? could you not be annulling? could he not be annulling? could we not be annulling? could you not be annulling? could they not be annulling?
Perfect
could I not have annulled? could you not have annulled? could he not have annulled? could we not have annulled? could you not have annulled? could they not have annulled?
V-ing perfect
could I not have been annulling? could you not have been annulling? could he not have been annulling? could we not have been annulling? could you not have been annulling? could they not have been annulling?