I could defibrinate you could defibrinate he could defibrinate we could defibrinate you could defibrinate they could defibrinate
V-ing form
I could be defibrinating you could be defibrinating he could be defibrinating we could be defibrinating you could be defibrinating they could be defibrinating
Perfect
I could have defibrinated you could have defibrinated he could have defibrinated we could have defibrinated you could have defibrinated they could have defibrinated
V-ing perfect
I could have been defibrinating you could have been defibrinating he could have been defibrinating we could have been defibrinating you could have been defibrinating they could have been defibrinating
Negation
Simple form
I could not defibrinate you could not defibrinate he could not defibrinate we could not defibrinate you could not defibrinate they could not defibrinate
V-ing form
I could not be defibrinating you could not be defibrinating he could not be defibrinating we could not be defibrinating you could not be defibrinating they could not be defibrinating
Perfect
I could not have defibrinated you could not have defibrinated he could not have defibrinated we could not have defibrinated you could not have defibrinated they could not have defibrinated
V-ing perfect
I could not have been defibrinating you could not have been defibrinating he could not have been defibrinating we could not have been defibrinating you could not have been defibrinating they could not have been defibrinating
Interrogative form
Simple form
could I defibrinate? could you defibrinate? could he defibrinate? could we defibrinate? could you defibrinate? could they defibrinate?
V-ing form
could I be defibrinating? could you be defibrinating? could he be defibrinating? could we be defibrinating? could you be defibrinating? could they be defibrinating?
Perfect
could I have defibrinated? could you have defibrinated? could he have defibrinated? could we have defibrinated? could you have defibrinated? could they have defibrinated?
V-ing perfect
could I have been defibrinating? could you have been defibrinating? could he have been defibrinating? could we have been defibrinating? could you have been defibrinating? could they have been defibrinating?
Interro-negative form
Simple form
could I not defibrinate? could you not defibrinate? could he not defibrinate? could we not defibrinate? could you not defibrinate? could they not defibrinate?
V-ing form
could I not be defibrinating? could you not be defibrinating? could he not be defibrinating? could we not be defibrinating? could you not be defibrinating? could they not be defibrinating?
Perfect
could I not have defibrinated? could you not have defibrinated? could he not have defibrinated? could we not have defibrinated? could you not have defibrinated? could they not have defibrinated?
V-ing perfect
could I not have been defibrinating? could you not have been defibrinating? could he not have been defibrinating? could we not have been defibrinating? could you not have been defibrinating? could they not have been defibrinating?