I could breach you could breach he could breach we could breach you could breach they could breach
V-ing form
I could be breaching you could be breaching he could be breaching we could be breaching you could be breaching they could be breaching
Perfect
I could have breached you could have breached he could have breached we could have breached you could have breached they could have breached
V-ing perfect
I could have been breaching you could have been breaching he could have been breaching we could have been breaching you could have been breaching they could have been breaching
Negation
Simple form
I could not breach you could not breach he could not breach we could not breach you could not breach they could not breach
V-ing form
I could not be breaching you could not be breaching he could not be breaching we could not be breaching you could not be breaching they could not be breaching
Perfect
I could not have breached you could not have breached he could not have breached we could not have breached you could not have breached they could not have breached
V-ing perfect
I could not have been breaching you could not have been breaching he could not have been breaching we could not have been breaching you could not have been breaching they could not have been breaching
Interrogative form
Simple form
could I breach? could you breach? could he breach? could we breach? could you breach? could they breach?
V-ing form
could I be breaching? could you be breaching? could he be breaching? could we be breaching? could you be breaching? could they be breaching?
Perfect
could I have breached? could you have breached? could he have breached? could we have breached? could you have breached? could they have breached?
V-ing perfect
could I have been breaching? could you have been breaching? could he have been breaching? could we have been breaching? could you have been breaching? could they have been breaching?
Interro-negative form
Simple form
could I not breach? could you not breach? could he not breach? could we not breach? could you not breach? could they not breach?
V-ing form
could I not be breaching? could you not be breaching? could he not be breaching? could we not be breaching? could you not be breaching? could they not be breaching?
Perfect
could I not have breached? could you not have breached? could he not have breached? could we not have breached? could you not have breached? could they not have breached?
V-ing perfect
could I not have been breaching? could you not have been breaching? could he not have been breaching? could we not have been breaching? could you not have been breaching? could they not have been breaching?