I could sacrifice you could sacrifice he could sacrifice we could sacrifice you could sacrifice they could sacrifice
V-ing form
I could be sacrificing you could be sacrificing he could be sacrificing we could be sacrificing you could be sacrificing they could be sacrificing
Perfect
I could have sacrificed you could have sacrificed he could have sacrificed we could have sacrificed you could have sacrificed they could have sacrificed
V-ing perfect
I could have been sacrificing you could have been sacrificing he could have been sacrificing we could have been sacrificing you could have been sacrificing they could have been sacrificing
Negation
Simple form
I could not sacrifice you could not sacrifice he could not sacrifice we could not sacrifice you could not sacrifice they could not sacrifice
V-ing form
I could not be sacrificing you could not be sacrificing he could not be sacrificing we could not be sacrificing you could not be sacrificing they could not be sacrificing
Perfect
I could not have sacrificed you could not have sacrificed he could not have sacrificed we could not have sacrificed you could not have sacrificed they could not have sacrificed
V-ing perfect
I could not have been sacrificing you could not have been sacrificing he could not have been sacrificing we could not have been sacrificing you could not have been sacrificing they could not have been sacrificing
Interrogative form
Simple form
could I sacrifice? could you sacrifice? could he sacrifice? could we sacrifice? could you sacrifice? could they sacrifice?
V-ing form
could I be sacrificing? could you be sacrificing? could he be sacrificing? could we be sacrificing? could you be sacrificing? could they be sacrificing?
Perfect
could I have sacrificed? could you have sacrificed? could he have sacrificed? could we have sacrificed? could you have sacrificed? could they have sacrificed?
V-ing perfect
could I have been sacrificing? could you have been sacrificing? could he have been sacrificing? could we have been sacrificing? could you have been sacrificing? could they have been sacrificing?
Interro-negative form
Simple form
could I not sacrifice? could you not sacrifice? could he not sacrifice? could we not sacrifice? could you not sacrifice? could they not sacrifice?
V-ing form
could I not be sacrificing? could you not be sacrificing? could he not be sacrificing? could we not be sacrificing? could you not be sacrificing? could they not be sacrificing?
Perfect
could I not have sacrificed? could you not have sacrificed? could he not have sacrificed? could we not have sacrificed? could you not have sacrificed? could they not have sacrificed?
V-ing perfect
could I not have been sacrificing? could you not have been sacrificing? could he not have been sacrificing? could we not have been sacrificing? could you not have been sacrificing? could they not have been sacrificing?