I could communize you could communize he could communize we could communize you could communize they could communize
V-ing form
I could be communizing you could be communizing he could be communizing we could be communizing you could be communizing they could be communizing
Perfect
I could have communized you could have communized he could have communized we could have communized you could have communized they could have communized
V-ing perfect
I could have been communizing you could have been communizing he could have been communizing we could have been communizing you could have been communizing they could have been communizing
Negation
Simple form
I could not communize you could not communize he could not communize we could not communize you could not communize they could not communize
V-ing form
I could not be communizing you could not be communizing he could not be communizing we could not be communizing you could not be communizing they could not be communizing
Perfect
I could not have communized you could not have communized he could not have communized we could not have communized you could not have communized they could not have communized
V-ing perfect
I could not have been communizing you could not have been communizing he could not have been communizing we could not have been communizing you could not have been communizing they could not have been communizing
Interrogative form
Simple form
could I communize? could you communize? could he communize? could we communize? could you communize? could they communize?
V-ing form
could I be communizing? could you be communizing? could he be communizing? could we be communizing? could you be communizing? could they be communizing?
Perfect
could I have communized? could you have communized? could he have communized? could we have communized? could you have communized? could they have communized?
V-ing perfect
could I have been communizing? could you have been communizing? could he have been communizing? could we have been communizing? could you have been communizing? could they have been communizing?
Interro-negative form
Simple form
could I not communize? could you not communize? could he not communize? could we not communize? could you not communize? could they not communize?
V-ing form
could I not be communizing? could you not be communizing? could he not be communizing? could we not be communizing? could you not be communizing? could they not be communizing?
Perfect
could I not have communized? could you not have communized? could he not have communized? could we not have communized? could you not have communized? could they not have communized?
V-ing perfect
could I not have been communizing? could you not have been communizing? could he not have been communizing? could we not have been communizing? could you not have been communizing? could they not have been communizing?