I could decapitate you could decapitate he could decapitate we could decapitate you could decapitate they could decapitate
V-ing form
I could be decapitating you could be decapitating he could be decapitating we could be decapitating you could be decapitating they could be decapitating
Perfect
I could have decapitated you could have decapitated he could have decapitated we could have decapitated you could have decapitated they could have decapitated
V-ing perfect
I could have been decapitating you could have been decapitating he could have been decapitating we could have been decapitating you could have been decapitating they could have been decapitating
Negation
Simple form
I could not decapitate you could not decapitate he could not decapitate we could not decapitate you could not decapitate they could not decapitate
V-ing form
I could not be decapitating you could not be decapitating he could not be decapitating we could not be decapitating you could not be decapitating they could not be decapitating
Perfect
I could not have decapitated you could not have decapitated he could not have decapitated we could not have decapitated you could not have decapitated they could not have decapitated
V-ing perfect
I could not have been decapitating you could not have been decapitating he could not have been decapitating we could not have been decapitating you could not have been decapitating they could not have been decapitating
Interrogative form
Simple form
could I decapitate? could you decapitate? could he decapitate? could we decapitate? could you decapitate? could they decapitate?
V-ing form
could I be decapitating? could you be decapitating? could he be decapitating? could we be decapitating? could you be decapitating? could they be decapitating?
Perfect
could I have decapitated? could you have decapitated? could he have decapitated? could we have decapitated? could you have decapitated? could they have decapitated?
V-ing perfect
could I have been decapitating? could you have been decapitating? could he have been decapitating? could we have been decapitating? could you have been decapitating? could they have been decapitating?
Interro-negative form
Simple form
could I not decapitate? could you not decapitate? could he not decapitate? could we not decapitate? could you not decapitate? could they not decapitate?
V-ing form
could I not be decapitating? could you not be decapitating? could he not be decapitating? could we not be decapitating? could you not be decapitating? could they not be decapitating?
Perfect
could I not have decapitated? could you not have decapitated? could he not have decapitated? could we not have decapitated? could you not have decapitated? could they not have decapitated?
V-ing perfect
could I not have been decapitating? could you not have been decapitating? could he not have been decapitating? could we not have been decapitating? could you not have been decapitating? could they not have been decapitating?