I could prostrate you could prostrate he could prostrate we could prostrate you could prostrate they could prostrate
V-ing form
I could be prostrating you could be prostrating he could be prostrating we could be prostrating you could be prostrating they could be prostrating
Perfect
I could have prostrated you could have prostrated he could have prostrated we could have prostrated you could have prostrated they could have prostrated
V-ing perfect
I could have been prostrating you could have been prostrating he could have been prostrating we could have been prostrating you could have been prostrating they could have been prostrating
Negation
Simple form
I could not prostrate you could not prostrate he could not prostrate we could not prostrate you could not prostrate they could not prostrate
V-ing form
I could not be prostrating you could not be prostrating he could not be prostrating we could not be prostrating you could not be prostrating they could not be prostrating
Perfect
I could not have prostrated you could not have prostrated he could not have prostrated we could not have prostrated you could not have prostrated they could not have prostrated
V-ing perfect
I could not have been prostrating you could not have been prostrating he could not have been prostrating we could not have been prostrating you could not have been prostrating they could not have been prostrating
Interrogative form
Simple form
could I prostrate? could you prostrate? could he prostrate? could we prostrate? could you prostrate? could they prostrate?
V-ing form
could I be prostrating? could you be prostrating? could he be prostrating? could we be prostrating? could you be prostrating? could they be prostrating?
Perfect
could I have prostrated? could you have prostrated? could he have prostrated? could we have prostrated? could you have prostrated? could they have prostrated?
V-ing perfect
could I have been prostrating? could you have been prostrating? could he have been prostrating? could we have been prostrating? could you have been prostrating? could they have been prostrating?
Interro-negative form
Simple form
could I not prostrate? could you not prostrate? could he not prostrate? could we not prostrate? could you not prostrate? could they not prostrate?
V-ing form
could I not be prostrating? could you not be prostrating? could he not be prostrating? could we not be prostrating? could you not be prostrating? could they not be prostrating?
Perfect
could I not have prostrated? could you not have prostrated? could he not have prostrated? could we not have prostrated? could you not have prostrated? could they not have prostrated?
V-ing perfect
could I not have been prostrating? could you not have been prostrating? could he not have been prostrating? could we not have been prostrating? could you not have been prostrating? could they not have been prostrating?