I could blackmarket you could blackmarket he could blackmarket we could blackmarket you could blackmarket they could blackmarket
V-ing form
I could be blackmarketing you could be blackmarketing he could be blackmarketing we could be blackmarketing you could be blackmarketing they could be blackmarketing
Perfect
I could have blackmarketed you could have blackmarketed he could have blackmarketed we could have blackmarketed you could have blackmarketed they could have blackmarketed
V-ing perfect
I could have been blackmarketing you could have been blackmarketing he could have been blackmarketing we could have been blackmarketing you could have been blackmarketing they could have been blackmarketing
Negation
Simple form
I could not blackmarket you could not blackmarket he could not blackmarket we could not blackmarket you could not blackmarket they could not blackmarket
V-ing form
I could not be blackmarketing you could not be blackmarketing he could not be blackmarketing we could not be blackmarketing you could not be blackmarketing they could not be blackmarketing
Perfect
I could not have blackmarketed you could not have blackmarketed he could not have blackmarketed we could not have blackmarketed you could not have blackmarketed they could not have blackmarketed
V-ing perfect
I could not have been blackmarketing you could not have been blackmarketing he could not have been blackmarketing we could not have been blackmarketing you could not have been blackmarketing they could not have been blackmarketing
Interrogative form
Simple form
could I blackmarket? could you blackmarket? could he blackmarket? could we blackmarket? could you blackmarket? could they blackmarket?
V-ing form
could I be blackmarketing? could you be blackmarketing? could he be blackmarketing? could we be blackmarketing? could you be blackmarketing? could they be blackmarketing?
Perfect
could I have blackmarketed? could you have blackmarketed? could he have blackmarketed? could we have blackmarketed? could you have blackmarketed? could they have blackmarketed?
V-ing perfect
could I have been blackmarketing? could you have been blackmarketing? could he have been blackmarketing? could we have been blackmarketing? could you have been blackmarketing? could they have been blackmarketing?
Interro-negative form
Simple form
could I not blackmarket? could you not blackmarket? could he not blackmarket? could we not blackmarket? could you not blackmarket? could they not blackmarket?
V-ing form
could I not be blackmarketing? could you not be blackmarketing? could he not be blackmarketing? could we not be blackmarketing? could you not be blackmarketing? could they not be blackmarketing?
Perfect
could I not have blackmarketed? could you not have blackmarketed? could he not have blackmarketed? could we not have blackmarketed? could you not have blackmarketed? could they not have blackmarketed?
V-ing perfect
could I not have been blackmarketing? could you not have been blackmarketing? could he not have been blackmarketing? could we not have been blackmarketing? could you not have been blackmarketing? could they not have been blackmarketing?