I could prosecute you could prosecute she could prosecute we could prosecute you could prosecute they could prosecute
V-ing form
I could be prosecuting you could be prosecuting she could be prosecuting we could be prosecuting you could be prosecuting they could be prosecuting
Perfect
I could have prosecuted you could have prosecuted she 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 she 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 she 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 she 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 she 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 she 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 she prosecute? could we prosecute? could you prosecute? could they prosecute?
V-ing form
could I be prosecuting? could you be prosecuting? could she be prosecuting? could we be prosecuting? could you be prosecuting? could they be prosecuting?
Perfect
could I have prosecuted? could you have prosecuted? could she 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 she 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 she 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 she 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 she 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 she have been prosecuting? couldn't we have been prosecuting? couldn't you have been prosecuting? couldn't they have been prosecuting?