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