I could ambush you could ambush he could ambush we could ambush you could ambush they could ambush
V-ing form
I could be ambushing you could be ambushing he could be ambushing we could be ambushing you could be ambushing they could be ambushing
Perfect
I could have ambushed you could have ambushed he could have ambushed we could have ambushed you could have ambushed they could have ambushed
V-ing perfect
I could have been ambushing you could have been ambushing he could have been ambushing we could have been ambushing you could have been ambushing they could have been ambushing
Negation
Simple form
I could not ambush you could not ambush he could not ambush we could not ambush you could not ambush they could not ambush
V-ing form
I could not be ambushing you could not be ambushing he could not be ambushing we could not be ambushing you could not be ambushing they could not be ambushing
Perfect
I could not have ambushed you could not have ambushed he could not have ambushed we could not have ambushed you could not have ambushed they could not have ambushed
V-ing perfect
I could not have been ambushing you could not have been ambushing he could not have been ambushing we could not have been ambushing you could not have been ambushing they could not have been ambushing
Interrogative form
Simple form
could I ambush? could you ambush? could he ambush? could we ambush? could you ambush? could they ambush?
V-ing form
could I be ambushing? could you be ambushing? could he be ambushing? could we be ambushing? could you be ambushing? could they be ambushing?
Perfect
could I have ambushed? could you have ambushed? could he have ambushed? could we have ambushed? could you have ambushed? could they have ambushed?
V-ing perfect
could I have been ambushing? could you have been ambushing? could he have been ambushing? could we have been ambushing? could you have been ambushing? could they have been ambushing?
Interro-negative form
Simple form
could I not ambush? could you not ambush? could he not ambush? could we not ambush? could you not ambush? could they not ambush?
V-ing form
could I not be ambushing? could you not be ambushing? could he not be ambushing? could we not be ambushing? could you not be ambushing? could they not be ambushing?
Perfect
could I not have ambushed? could you not have ambushed? could he not have ambushed? could we not have ambushed? could you not have ambushed? could they not have ambushed?
V-ing perfect
could I not have been ambushing? could you not have been ambushing? could he not have been ambushing? could we not have been ambushing? could you not have been ambushing? could they not have been ambushing?