I could superannuate you could superannuate he could superannuate we could superannuate you could superannuate they could superannuate
V-ing form
I could be superannuating you could be superannuating he could be superannuating we could be superannuating you could be superannuating they could be superannuating
Perfect
I could have superannuated you could have superannuated he could have superannuated we could have superannuated you could have superannuated they could have superannuated
V-ing perfect
I could have been superannuating you could have been superannuating he could have been superannuating we could have been superannuating you could have been superannuating they could have been superannuating
Negation
Simple form
I couldn't superannuate you couldn't superannuate he couldn't superannuate we couldn't superannuate you couldn't superannuate they couldn't superannuate
V-ing form
I couldn't be superannuating you couldn't be superannuating he couldn't be superannuating we couldn't be superannuating you couldn't be superannuating they couldn't be superannuating
Perfect
I couldn't have superannuated you couldn't have superannuated he couldn't have superannuated we couldn't have superannuated you couldn't have superannuated they couldn't have superannuated
V-ing perfect
I couldn't have been superannuating you couldn't have been superannuating he couldn't have been superannuating we couldn't have been superannuating you couldn't have been superannuating they couldn't have been superannuating
Interrogative form
Simple form
could I superannuate? could you superannuate? could he superannuate? could we superannuate? could you superannuate? could they superannuate?
V-ing form
could I be superannuating? could you be superannuating? could he be superannuating? could we be superannuating? could you be superannuating? could they be superannuating?
Perfect
could I have superannuated? could you have superannuated? could he have superannuated? could we have superannuated? could you have superannuated? could they have superannuated?
V-ing perfect
could I have been superannuating? could you have been superannuating? could he have been superannuating? could we have been superannuating? could you have been superannuating? could they have been superannuating?
Interro-negative form
Simple form
couldn't I superannuate? couldn't you superannuate? couldn't he superannuate? couldn't we superannuate? couldn't you superannuate? couldn't they superannuate?
V-ing form
couldn't I be superannuating? couldn't you be superannuating? couldn't he be superannuating? couldn't we be superannuating? couldn't you be superannuating? couldn't they be superannuating?
Perfect
couldn't I have superannuated? couldn't you have superannuated? couldn't he have superannuated? couldn't we have superannuated? couldn't you have superannuated? couldn't they have superannuated?
V-ing perfect
couldn't I have been superannuating? couldn't you have been superannuating? couldn't he have been superannuating? couldn't we have been superannuating? couldn't you have been superannuating? couldn't they have been superannuating?