I could contract you could contract he could contract we could contract you could contract they could contract
V-ing form
I could be contracting you could be contracting he could be contracting we could be contracting you could be contracting they could be contracting
Perfect
I could have contracted you could have contracted he could have contracted we could have contracted you could have contracted they could have contracted
V-ing perfect
I could have been contracting you could have been contracting he could have been contracting we could have been contracting you could have been contracting they could have been contracting
Negation
Simple form
I could not contract you could not contract he could not contract we could not contract you could not contract they could not contract
V-ing form
I could not be contracting you could not be contracting he could not be contracting we could not be contracting you could not be contracting they could not be contracting
Perfect
I could not have contracted you could not have contracted he could not have contracted we could not have contracted you could not have contracted they could not have contracted
V-ing perfect
I could not have been contracting you could not have been contracting he could not have been contracting we could not have been contracting you could not have been contracting they could not have been contracting
Interrogative form
Simple form
could I contract? could you contract? could he contract? could we contract? could you contract? could they contract?
V-ing form
could I be contracting? could you be contracting? could he be contracting? could we be contracting? could you be contracting? could they be contracting?
Perfect
could I have contracted? could you have contracted? could he have contracted? could we have contracted? could you have contracted? could they have contracted?
V-ing perfect
could I have been contracting? could you have been contracting? could he have been contracting? could we have been contracting? could you have been contracting? could they have been contracting?
Interro-negative form
Simple form
could I not contract? could you not contract? could he not contract? could we not contract? could you not contract? could they not contract?
V-ing form
could I not be contracting? could you not be contracting? could he not be contracting? could we not be contracting? could you not be contracting? could they not be contracting?
Perfect
could I not have contracted? could you not have contracted? could he not have contracted? could we not have contracted? could you not have contracted? could they not have contracted?
V-ing perfect
could I not have been contracting? could you not have been contracting? could he not have been contracting? could we not have been contracting? could you not have been contracting? could they not have been contracting?