I could matriculate you could matriculate he could matriculate we could matriculate you could matriculate they could matriculate
V-ing form
I could be matriculating you could be matriculating he could be matriculating we could be matriculating you could be matriculating they could be matriculating
Perfect
I could have matriculated you could have matriculated he could have matriculated we could have matriculated you could have matriculated they could have matriculated
V-ing perfect
I could have been matriculating you could have been matriculating he could have been matriculating we could have been matriculating you could have been matriculating they could have been matriculating
Negation
Simple form
I could not matriculate you could not matriculate he could not matriculate we could not matriculate you could not matriculate they could not matriculate
V-ing form
I could not be matriculating you could not be matriculating he could not be matriculating we could not be matriculating you could not be matriculating they could not be matriculating
Perfect
I could not have matriculated you could not have matriculated he could not have matriculated we could not have matriculated you could not have matriculated they could not have matriculated
V-ing perfect
I could not have been matriculating you could not have been matriculating he could not have been matriculating we could not have been matriculating you could not have been matriculating they could not have been matriculating
Interrogative form
Simple form
could I matriculate? could you matriculate? could he matriculate? could we matriculate? could you matriculate? could they matriculate?
V-ing form
could I be matriculating? could you be matriculating? could he be matriculating? could we be matriculating? could you be matriculating? could they be matriculating?
Perfect
could I have matriculated? could you have matriculated? could he have matriculated? could we have matriculated? could you have matriculated? could they have matriculated?
V-ing perfect
could I have been matriculating? could you have been matriculating? could he have been matriculating? could we have been matriculating? could you have been matriculating? could they have been matriculating?
Interro-negative form
Simple form
could I not matriculate? could you not matriculate? could he not matriculate? could we not matriculate? could you not matriculate? could they not matriculate?
V-ing form
could I not be matriculating? could you not be matriculating? could he not be matriculating? could we not be matriculating? could you not be matriculating? could they not be matriculating?
Perfect
could I not have matriculated? could you not have matriculated? could he not have matriculated? could we not have matriculated? could you not have matriculated? could they not have matriculated?
V-ing perfect
could I not have been matriculating? could you not have been matriculating? could he not have been matriculating? could we not have been matriculating? could you not have been matriculating? could they not have been matriculating?