I could apostrophize you could apostrophize he could apostrophize we could apostrophize you could apostrophize they could apostrophize
V-ing form
I could be apostrophizing you could be apostrophizing he could be apostrophizing we could be apostrophizing you could be apostrophizing they could be apostrophizing
Perfect
I could have apostrophized you could have apostrophized he could have apostrophized we could have apostrophized you could have apostrophized they could have apostrophized
V-ing perfect
I could have been apostrophizing you could have been apostrophizing he could have been apostrophizing we could have been apostrophizing you could have been apostrophizing they could have been apostrophizing
Negation
Simple form
I could not apostrophize you could not apostrophize he could not apostrophize we could not apostrophize you could not apostrophize they could not apostrophize
V-ing form
I could not be apostrophizing you could not be apostrophizing he could not be apostrophizing we could not be apostrophizing you could not be apostrophizing they could not be apostrophizing
Perfect
I could not have apostrophized you could not have apostrophized he could not have apostrophized we could not have apostrophized you could not have apostrophized they could not have apostrophized
V-ing perfect
I could not have been apostrophizing you could not have been apostrophizing he could not have been apostrophizing we could not have been apostrophizing you could not have been apostrophizing they could not have been apostrophizing
Interrogative form
Simple form
could I apostrophize? could you apostrophize? could he apostrophize? could we apostrophize? could you apostrophize? could they apostrophize?
V-ing form
could I be apostrophizing? could you be apostrophizing? could he be apostrophizing? could we be apostrophizing? could you be apostrophizing? could they be apostrophizing?
Perfect
could I have apostrophized? could you have apostrophized? could he have apostrophized? could we have apostrophized? could you have apostrophized? could they have apostrophized?
V-ing perfect
could I have been apostrophizing? could you have been apostrophizing? could he have been apostrophizing? could we have been apostrophizing? could you have been apostrophizing? could they have been apostrophizing?
Interro-negative form
Simple form
could I not apostrophize? could you not apostrophize? could he not apostrophize? could we not apostrophize? could you not apostrophize? could they not apostrophize?
V-ing form
could I not be apostrophizing? could you not be apostrophizing? could he not be apostrophizing? could we not be apostrophizing? could you not be apostrophizing? could they not be apostrophizing?
Perfect
could I not have apostrophized? could you not have apostrophized? could he not have apostrophized? could we not have apostrophized? could you not have apostrophized? could they not have apostrophized?
V-ing perfect
could I not have been apostrophizing? could you not have been apostrophizing? could he not have been apostrophizing? could we not have been apostrophizing? could you not have been apostrophizing? could they not have been apostrophizing?