I could castrate you could castrate he could castrate we could castrate you could castrate they could castrate
V-ing form
I could be castrating you could be castrating he could be castrating we could be castrating you could be castrating they could be castrating
Perfect
I could have castrated you could have castrated he could have castrated we could have castrated you could have castrated they could have castrated
V-ing perfect
I could have been castrating you could have been castrating he could have been castrating we could have been castrating you could have been castrating they could have been castrating
Negation
Simple form
I could not castrate you could not castrate he could not castrate we could not castrate you could not castrate they could not castrate
V-ing form
I could not be castrating you could not be castrating he could not be castrating we could not be castrating you could not be castrating they could not be castrating
Perfect
I could not have castrated you could not have castrated he could not have castrated we could not have castrated you could not have castrated they could not have castrated
V-ing perfect
I could not have been castrating you could not have been castrating he could not have been castrating we could not have been castrating you could not have been castrating they could not have been castrating
Interrogative form
Simple form
could I castrate? could you castrate? could he castrate? could we castrate? could you castrate? could they castrate?
V-ing form
could I be castrating? could you be castrating? could he be castrating? could we be castrating? could you be castrating? could they be castrating?
Perfect
could I have castrated? could you have castrated? could he have castrated? could we have castrated? could you have castrated? could they have castrated?
V-ing perfect
could I have been castrating? could you have been castrating? could he have been castrating? could we have been castrating? could you have been castrating? could they have been castrating?
Interro-negative form
Simple form
could I not castrate? could you not castrate? could he not castrate? could we not castrate? could you not castrate? could they not castrate?
V-ing form
could I not be castrating? could you not be castrating? could he not be castrating? could we not be castrating? could you not be castrating? could they not be castrating?
Perfect
could I not have castrated? could you not have castrated? could he not have castrated? could we not have castrated? could you not have castrated? could they not have castrated?
V-ing perfect
could I not have been castrating? could you not have been castrating? could he not have been castrating? could we not have been castrating? could you not have been castrating? could they not have been castrating?