I could double-cross you could double-cross she could double-cross we could double-cross you could double-cross they could double-cross
V-ing form
I could be double-crossing you could be double-crossing she could be double-crossing we could be double-crossing you could be double-crossing they could be double-crossing
Perfect
I could have double-crossed you could have double-crossed she could have double-crossed we could have double-crossed you could have double-crossed they could have double-crossed
V-ing perfect
I could have been double-crossing you could have been double-crossing she could have been double-crossing we could have been double-crossing you could have been double-crossing they could have been double-crossing
Negation
Simple form
I could not double-cross you could not double-cross she could not double-cross we could not double-cross you could not double-cross they could not double-cross
V-ing form
I could not be double-crossing you could not be double-crossing she could not be double-crossing we could not be double-crossing you could not be double-crossing they could not be double-crossing
Perfect
I could not have double-crossed you could not have double-crossed she could not have double-crossed we could not have double-crossed you could not have double-crossed they could not have double-crossed
V-ing perfect
I could not have been double-crossing you could not have been double-crossing she could not have been double-crossing we could not have been double-crossing you could not have been double-crossing they could not have been double-crossing
Interrogative form
Simple form
could I double-cross? could you double-cross? could she double-cross? could we double-cross? could you double-cross? could they double-cross?
V-ing form
could I be double-crossing? could you be double-crossing? could she be double-crossing? could we be double-crossing? could you be double-crossing? could they be double-crossing?
Perfect
could I have double-crossed? could you have double-crossed? could she have double-crossed? could we have double-crossed? could you have double-crossed? could they have double-crossed?
V-ing perfect
could I have been double-crossing? could you have been double-crossing? could she have been double-crossing? could we have been double-crossing? could you have been double-crossing? could they have been double-crossing?
Interro-negative form
Simple form
could I not double-cross? could you not double-cross? could she not double-cross? could we not double-cross? could you not double-cross? could they not double-cross?
V-ing form
could I not be double-crossing? could you not be double-crossing? could she not be double-crossing? could we not be double-crossing? could you not be double-crossing? could they not be double-crossing?
Perfect
could I not have double-crossed? could you not have double-crossed? could she not have double-crossed? could we not have double-crossed? could you not have double-crossed? could they not have double-crossed?
V-ing perfect
could I not have been double-crossing? could you not have been double-crossing? could she not have been double-crossing? could we not have been double-crossing? could you not have been double-crossing? could they not have been double-crossing?