I could spend you could spend he could spend we could spend you could spend they could spend
V-ing form
I could be spending you could be spending he could be spending we could be spending you could be spending they could be spending
Perfect
I could have spent you could have spent he could have spent we could have spent you could have spent they could have spent
V-ing perfect
I could have been spending you could have been spending he could have been spending we could have been spending you could have been spending they could have been spending
Negation
Simple form
I could not spend you could not spend he could not spend we could not spend you could not spend they could not spend
V-ing form
I could not be spending you could not be spending he could not be spending we could not be spending you could not be spending they could not be spending
Perfect
I could not have spent you could not have spent he could not have spent we could not have spent you could not have spent they could not have spent
V-ing perfect
I could not have been spending you could not have been spending he could not have been spending we could not have been spending you could not have been spending they could not have been spending
Interrogative form
Simple form
could I spend? could you spend? could he spend? could we spend? could you spend? could they spend?
V-ing form
could I be spending? could you be spending? could he be spending? could we be spending? could you be spending? could they be spending?
Perfect
could I have spent? could you have spent? could he have spent? could we have spent? could you have spent? could they have spent?
V-ing perfect
could I have been spending? could you have been spending? could he have been spending? could we have been spending? could you have been spending? could they have been spending?
Interro-negative form
Simple form
could I not spend? could you not spend? could he not spend? could we not spend? could you not spend? could they not spend?
V-ing form
could I not be spending? could you not be spending? could he not be spending? could we not be spending? could you not be spending? could they not be spending?
Perfect
could I not have spent? could you not have spent? could he not have spent? could we not have spent? could you not have spent? could they not have spent?
V-ing perfect
could I not have been spending? could you not have been spending? could he not have been spending? could we not have been spending? could you not have been spending? could they not have been spending?