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 couldn't spend you couldn't spend he couldn't spend we couldn't spend you couldn't spend they couldn't spend
V-ing form
I couldn't be spending you couldn't be spending he couldn't be spending we couldn't be spending you couldn't be spending they couldn't be spending
Perfect
I couldn't have spent you couldn't have spent he couldn't have spent we couldn't have spent you couldn't have spent they couldn't have spent
V-ing perfect
I couldn't have been spending you couldn't have been spending he couldn't have been spending we couldn't have been spending you couldn't have been spending they couldn't 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
couldn't I spend? couldn't you spend? couldn't he spend? couldn't we spend? couldn't you spend? couldn't they spend?
V-ing form
couldn't I be spending? couldn't you be spending? couldn't he be spending? couldn't we be spending? couldn't you be spending? couldn't they be spending?
Perfect
couldn't I have spent? couldn't you have spent? couldn't he have spent? couldn't we have spent? couldn't you have spent? couldn't they have spent?
V-ing perfect
couldn't I have been spending? couldn't you have been spending? couldn't he have been spending? couldn't we have been spending? couldn't you have been spending? couldn't they have been spending?