I could arbitrate you could arbitrate he could arbitrate we could arbitrate you could arbitrate they could arbitrate
V-ing form
I could be arbitrating you could be arbitrating he could be arbitrating we could be arbitrating you could be arbitrating they could be arbitrating
Perfect
I could have arbitrated you could have arbitrated he could have arbitrated we could have arbitrated you could have arbitrated they could have arbitrated
V-ing perfect
I could have been arbitrating you could have been arbitrating he could have been arbitrating we could have been arbitrating you could have been arbitrating they could have been arbitrating
Negation
Simple form
I could not arbitrate you could not arbitrate he could not arbitrate we could not arbitrate you could not arbitrate they could not arbitrate
V-ing form
I could not be arbitrating you could not be arbitrating he could not be arbitrating we could not be arbitrating you could not be arbitrating they could not be arbitrating
Perfect
I could not have arbitrated you could not have arbitrated he could not have arbitrated we could not have arbitrated you could not have arbitrated they could not have arbitrated
V-ing perfect
I could not have been arbitrating you could not have been arbitrating he could not have been arbitrating we could not have been arbitrating you could not have been arbitrating they could not have been arbitrating
Interrogative form
Simple form
could I arbitrate? could you arbitrate? could he arbitrate? could we arbitrate? could you arbitrate? could they arbitrate?
V-ing form
could I be arbitrating? could you be arbitrating? could he be arbitrating? could we be arbitrating? could you be arbitrating? could they be arbitrating?
Perfect
could I have arbitrated? could you have arbitrated? could he have arbitrated? could we have arbitrated? could you have arbitrated? could they have arbitrated?
V-ing perfect
could I have been arbitrating? could you have been arbitrating? could he have been arbitrating? could we have been arbitrating? could you have been arbitrating? could they have been arbitrating?
Interro-negative form
Simple form
could I not arbitrate? could you not arbitrate? could he not arbitrate? could we not arbitrate? could you not arbitrate? could they not arbitrate?
V-ing form
could I not be arbitrating? could you not be arbitrating? could he not be arbitrating? could we not be arbitrating? could you not be arbitrating? could they not be arbitrating?
Perfect
could I not have arbitrated? could you not have arbitrated? could he not have arbitrated? could we not have arbitrated? could you not have arbitrated? could they not have arbitrated?
V-ing perfect
could I not have been arbitrating? could you not have been arbitrating? could he not have been arbitrating? could we not have been arbitrating? could you not have been arbitrating? could they not have been arbitrating?