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