I could recognize you could recognize he could recognize we could recognize you could recognize they could recognize
V-ing form
I could be recognizing you could be recognizing he could be recognizing we could be recognizing you could be recognizing they could be recognizing
Perfect
I could have recognized you could have recognized he could have recognized we could have recognized you could have recognized they could have recognized
V-ing perfect
I could have been recognizing you could have been recognizing he could have been recognizing we could have been recognizing you could have been recognizing they could have been recognizing
Negation
Simple form
I could not recognize you could not recognize he could not recognize we could not recognize you could not recognize they could not recognize
V-ing form
I could not be recognizing you could not be recognizing he could not be recognizing we could not be recognizing you could not be recognizing they could not be recognizing
Perfect
I could not have recognized you could not have recognized he could not have recognized we could not have recognized you could not have recognized they could not have recognized
V-ing perfect
I could not have been recognizing you could not have been recognizing he could not have been recognizing we could not have been recognizing you could not have been recognizing they could not have been recognizing
Interrogative form
Simple form
could I recognize? could you recognize? could he recognize? could we recognize? could you recognize? could they recognize?
V-ing form
could I be recognizing? could you be recognizing? could he be recognizing? could we be recognizing? could you be recognizing? could they be recognizing?
Perfect
could I have recognized? could you have recognized? could he have recognized? could we have recognized? could you have recognized? could they have recognized?
V-ing perfect
could I have been recognizing? could you have been recognizing? could he have been recognizing? could we have been recognizing? could you have been recognizing? could they have been recognizing?
Interro-negative form
Simple form
could I not recognize? could you not recognize? could he not recognize? could we not recognize? could you not recognize? could they not recognize?
V-ing form
could I not be recognizing? could you not be recognizing? could he not be recognizing? could we not be recognizing? could you not be recognizing? could they not be recognizing?
Perfect
could I not have recognized? could you not have recognized? could he not have recognized? could we not have recognized? could you not have recognized? could they not have recognized?
V-ing perfect
could I not have been recognizing? could you not have been recognizing? could he not have been recognizing? could we not have been recognizing? could you not have been recognizing? could they not have been recognizing?