I could amerce you could amerce he could amerce we could amerce you could amerce they could amerce
V-ing form
I could be amercing you could be amercing he could be amercing we could be amercing you could be amercing they could be amercing
Perfect
I could have amerced you could have amerced he could have amerced we could have amerced you could have amerced they could have amerced
V-ing perfect
I could have been amercing you could have been amercing he could have been amercing we could have been amercing you could have been amercing they could have been amercing
Negation
Simple form
I could not amerce you could not amerce he could not amerce we could not amerce you could not amerce they could not amerce
V-ing form
I could not be amercing you could not be amercing he could not be amercing we could not be amercing you could not be amercing they could not be amercing
Perfect
I could not have amerced you could not have amerced he could not have amerced we could not have amerced you could not have amerced they could not have amerced
V-ing perfect
I could not have been amercing you could not have been amercing he could not have been amercing we could not have been amercing you could not have been amercing they could not have been amercing
Interrogative form
Simple form
could I amerce? could you amerce? could he amerce? could we amerce? could you amerce? could they amerce?
V-ing form
could I be amercing? could you be amercing? could he be amercing? could we be amercing? could you be amercing? could they be amercing?
Perfect
could I have amerced? could you have amerced? could he have amerced? could we have amerced? could you have amerced? could they have amerced?
V-ing perfect
could I have been amercing? could you have been amercing? could he have been amercing? could we have been amercing? could you have been amercing? could they have been amercing?
Interro-negative form
Simple form
could I not amerce? could you not amerce? could he not amerce? could we not amerce? could you not amerce? could they not amerce?
V-ing form
could I not be amercing? could you not be amercing? could he not be amercing? could we not be amercing? could you not be amercing? could they not be amercing?
Perfect
could I not have amerced? could you not have amerced? could he not have amerced? could we not have amerced? could you not have amerced? could they not have amerced?
V-ing perfect
could I not have been amercing? could you not have been amercing? could he not have been amercing? could we not have been amercing? could you not have been amercing? could they not have been amercing?