Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could spend spend you could spend spend she could spend spend we could spend spend you could spend spend they could spend spend
V-ing form
I could be spend spending you could be spend spending she could be spend spending we could be spend spending you could be spend spending they could be spend spending
Perfect
I could have spend spended you could have spend spended she could have spend spended we could have spend spended you could have spend spended they could have spend spended
V-ing perfect
I could have been spend spending you could have been spend spending she could have been spend spending we could have been spend spending you could have been spend spending they could have been spend spending
Negation
Simple form
I could not spend spend you could not spend spend she could not spend spend we could not spend spend you could not spend spend they could not spend spend
V-ing form
I could not be spend spending you could not be spend spending she could not be spend spending we could not be spend spending you could not be spend spending they could not be spend spending
Perfect
I could not have spend spended you could not have spend spended she could not have spend spended we could not have spend spended you could not have spend spended they could not have spend spended
V-ing perfect
I could not have been spend spending you could not have been spend spending she could not have been spend spending we could not have been spend spending you could not have been spend spending they could not have been spend spending
Interrogative form
Simple form
could I spend spend? could you spend spend? could she spend spend? could we spend spend? could you spend spend? could they spend spend?
V-ing form
could I be spend spending? could you be spend spending? could she be spend spending? could we be spend spending? could you be spend spending? could they be spend spending?
Perfect
could I have spend spended? could you have spend spended? could she have spend spended? could we have spend spended? could you have spend spended? could they have spend spended?
V-ing perfect
could I have been spend spending? could you have been spend spending? could she have been spend spending? could we have been spend spending? could you have been spend spending? could they have been spend spending?
Interro-negative form
Simple form
could I not spend spend? could you not spend spend? could she not spend spend? could we not spend spend? could you not spend spend? could they not spend spend?
V-ing form
could I not be spend spending? could you not be spend spending? could she not be spend spending? could we not be spend spending? could you not be spend spending? could they not be spend spending?
Perfect
could I not have spend spended? could you not have spend spended? could she not have spend spended? could we not have spend spended? could you not have spend spended? could they not have spend spended?
V-ing perfect
could I not have been spend spending? could you not have been spend spending? could she not have been spend spending? could we not have been spend spending? could you not have been spend spending? could they not have been spend spending?