I could bacterize you could bacterize he could bacterize we could bacterize you could bacterize they could bacterize
V-ing form
I could be bacterizing you could be bacterizing he could be bacterizing we could be bacterizing you could be bacterizing they could be bacterizing
Perfect
I could have bacterized you could have bacterized he could have bacterized we could have bacterized you could have bacterized they could have bacterized
V-ing perfect
I could have been bacterizing you could have been bacterizing he could have been bacterizing we could have been bacterizing you could have been bacterizing they could have been bacterizing
Negation
Simple form
I could not bacterize you could not bacterize he could not bacterize we could not bacterize you could not bacterize they could not bacterize
V-ing form
I could not be bacterizing you could not be bacterizing he could not be bacterizing we could not be bacterizing you could not be bacterizing they could not be bacterizing
Perfect
I could not have bacterized you could not have bacterized he could not have bacterized we could not have bacterized you could not have bacterized they could not have bacterized
V-ing perfect
I could not have been bacterizing you could not have been bacterizing he could not have been bacterizing we could not have been bacterizing you could not have been bacterizing they could not have been bacterizing
Interrogative form
Simple form
could I bacterize? could you bacterize? could he bacterize? could we bacterize? could you bacterize? could they bacterize?
V-ing form
could I be bacterizing? could you be bacterizing? could he be bacterizing? could we be bacterizing? could you be bacterizing? could they be bacterizing?
Perfect
could I have bacterized? could you have bacterized? could he have bacterized? could we have bacterized? could you have bacterized? could they have bacterized?
V-ing perfect
could I have been bacterizing? could you have been bacterizing? could he have been bacterizing? could we have been bacterizing? could you have been bacterizing? could they have been bacterizing?
Interro-negative form
Simple form
could I not bacterize? could you not bacterize? could he not bacterize? could we not bacterize? could you not bacterize? could they not bacterize?
V-ing form
could I not be bacterizing? could you not be bacterizing? could he not be bacterizing? could we not be bacterizing? could you not be bacterizing? could they not be bacterizing?
Perfect
could I not have bacterized? could you not have bacterized? could he not have bacterized? could we not have bacterized? could you not have bacterized? could they not have bacterized?
V-ing perfect
could I not have been bacterizing? could you not have been bacterizing? could he not have been bacterizing? could we not have been bacterizing? could you not have been bacterizing? could they not have been bacterizing?