I could war you could war he could war we could war you could war they could war
V-ing form
I could be warring you could be warring he could be warring we could be warring you could be warring they could be warring
Perfect
I could have warred you could have warred he could have warred we could have warred you could have warred they could have warred
V-ing perfect
I could have been warring you could have been warring he could have been warring we could have been warring you could have been warring they could have been warring
Negation
Simple form
I could not war you could not war he could not war we could not war you could not war they could not war
V-ing form
I could not be warring you could not be warring he could not be warring we could not be warring you could not be warring they could not be warring
Perfect
I could not have warred you could not have warred he could not have warred we could not have warred you could not have warred they could not have warred
V-ing perfect
I could not have been warring you could not have been warring he could not have been warring we could not have been warring you could not have been warring they could not have been warring
Interrogative form
Simple form
could I war? could you war? could he war? could we war? could you war? could they war?
V-ing form
could I be warring? could you be warring? could he be warring? could we be warring? could you be warring? could they be warring?
Perfect
could I have warred? could you have warred? could he have warred? could we have warred? could you have warred? could they have warred?
V-ing perfect
could I have been warring? could you have been warring? could he have been warring? could we have been warring? could you have been warring? could they have been warring?
Interro-negative form
Simple form
could I not war? could you not war? could he not war? could we not war? could you not war? could they not war?
V-ing form
could I not be warring? could you not be warring? could he not be warring? could we not be warring? could you not be warring? could they not be warring?
Perfect
could I not have warred? could you not have warred? could he not have warred? could we not have warred? could you not have warred? could they not have warred?
V-ing perfect
could I not have been warring? could you not have been warring? could he not have been warring? could we not have been warring? could you not have been warring? could they not have been warring?