I could prostrate you could prostrate she could prostrate we could prostrate you could prostrate they could prostrate
V-ing form
I could be prostrating you could be prostrating she could be prostrating we could be prostrating you could be prostrating they could be prostrating
Perfect
I could have prostrated you could have prostrated she 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 she could have been prostrating we could have been prostrating you could have been prostrating they could have been prostrating
Negation
Simple form
I couldn't prostrate you couldn't prostrate she couldn't prostrate we couldn't prostrate you couldn't prostrate they couldn't prostrate
V-ing form
I couldn't be prostrating you couldn't be prostrating she couldn't be prostrating we couldn't be prostrating you couldn't be prostrating they couldn't be prostrating
Perfect
I couldn't have prostrated you couldn't have prostrated she couldn't have prostrated we couldn't have prostrated you couldn't have prostrated they couldn't have prostrated
V-ing perfect
I couldn't have been prostrating you couldn't have been prostrating she couldn't have been prostrating we couldn't have been prostrating you couldn't have been prostrating they couldn't have been prostrating
Interrogative form
Simple form
could I prostrate? could you prostrate? could she prostrate? could we prostrate? could you prostrate? could they prostrate?
V-ing form
could I be prostrating? could you be prostrating? could she be prostrating? could we be prostrating? could you be prostrating? could they be prostrating?
Perfect
could I have prostrated? could you have prostrated? could she 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 she have been prostrating? could we have been prostrating? could you have been prostrating? could they have been prostrating?
Interro-negative form
Simple form
couldn't I prostrate? couldn't you prostrate? couldn't she prostrate? couldn't we prostrate? couldn't you prostrate? couldn't they prostrate?
V-ing form
couldn't I be prostrating? couldn't you be prostrating? couldn't she be prostrating? couldn't we be prostrating? couldn't you be prostrating? couldn't they be prostrating?
Perfect
couldn't I have prostrated? couldn't you have prostrated? couldn't she have prostrated? couldn't we have prostrated? couldn't you have prostrated? couldn't they have prostrated?
V-ing perfect
couldn't I have been prostrating? couldn't you have been prostrating? couldn't she have been prostrating? couldn't we have been prostrating? couldn't you have been prostrating? couldn't they have been prostrating?