I could double-cross you could double-cross he 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 he 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 he 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 he 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 couldn't double-cross you couldn't double-cross he couldn't double-cross we couldn't double-cross you couldn't double-cross they couldn't double-cross
V-ing form
I couldn't be double-crossing you couldn't be double-crossing he couldn't be double-crossing we couldn't be double-crossing you couldn't be double-crossing they couldn't be double-crossing
Perfect
I couldn't have double-crossed you couldn't have double-crossed he couldn't have double-crossed we couldn't have double-crossed you couldn't have double-crossed they couldn't have double-crossed
V-ing perfect
I couldn't have been double-crossing you couldn't have been double-crossing he couldn't have been double-crossing we couldn't have been double-crossing you couldn't have been double-crossing they couldn't have been double-crossing
Interrogative form
Simple form
could I double-cross? could you double-cross? could he 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 he 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 he 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 he 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
couldn't I double-cross? couldn't you double-cross? couldn't he double-cross? couldn't we double-cross? couldn't you double-cross? couldn't they double-cross?
V-ing form
couldn't I be double-crossing? couldn't you be double-crossing? couldn't he be double-crossing? couldn't we be double-crossing? couldn't you be double-crossing? couldn't they be double-crossing?
Perfect
couldn't I have double-crossed? couldn't you have double-crossed? couldn't he have double-crossed? couldn't we have double-crossed? couldn't you have double-crossed? couldn't they have double-crossed?
V-ing perfect
couldn't I have been double-crossing? couldn't you have been double-crossing? couldn't he have been double-crossing? couldn't we have been double-crossing? couldn't you have been double-crossing? couldn't they have been double-crossing?