I could phagocytize you could phagocytize he could phagocytize we could phagocytize you could phagocytize they could phagocytize
V-ing form
I could be phagocytizing you could be phagocytizing he could be phagocytizing we could be phagocytizing you could be phagocytizing they could be phagocytizing
Perfect
I could have phagocytized you could have phagocytized he could have phagocytized we could have phagocytized you could have phagocytized they could have phagocytized
V-ing perfect
I could have been phagocytizing you could have been phagocytizing he could have been phagocytizing we could have been phagocytizing you could have been phagocytizing they could have been phagocytizing
Negation
Simple form
I could not phagocytize you could not phagocytize he could not phagocytize we could not phagocytize you could not phagocytize they could not phagocytize
V-ing form
I could not be phagocytizing you could not be phagocytizing he could not be phagocytizing we could not be phagocytizing you could not be phagocytizing they could not be phagocytizing
Perfect
I could not have phagocytized you could not have phagocytized he could not have phagocytized we could not have phagocytized you could not have phagocytized they could not have phagocytized
V-ing perfect
I could not have been phagocytizing you could not have been phagocytizing he could not have been phagocytizing we could not have been phagocytizing you could not have been phagocytizing they could not have been phagocytizing
Interrogative form
Simple form
could I phagocytize? could you phagocytize? could he phagocytize? could we phagocytize? could you phagocytize? could they phagocytize?
V-ing form
could I be phagocytizing? could you be phagocytizing? could he be phagocytizing? could we be phagocytizing? could you be phagocytizing? could they be phagocytizing?
Perfect
could I have phagocytized? could you have phagocytized? could he have phagocytized? could we have phagocytized? could you have phagocytized? could they have phagocytized?
V-ing perfect
could I have been phagocytizing? could you have been phagocytizing? could he have been phagocytizing? could we have been phagocytizing? could you have been phagocytizing? could they have been phagocytizing?
Interro-negative form
Simple form
could I not phagocytize? could you not phagocytize? could he not phagocytize? could we not phagocytize? could you not phagocytize? could they not phagocytize?
V-ing form
could I not be phagocytizing? could you not be phagocytizing? could he not be phagocytizing? could we not be phagocytizing? could you not be phagocytizing? could they not be phagocytizing?
Perfect
could I not have phagocytized? could you not have phagocytized? could he not have phagocytized? could we not have phagocytized? could you not have phagocytized? could they not have phagocytized?
V-ing perfect
could I not have been phagocytizing? could you not have been phagocytizing? could he not have been phagocytizing? could we not have been phagocytizing? could you not have been phagocytizing? could they not have been phagocytizing?