I could rampart you could rampart he could rampart we could rampart you could rampart they could rampart
V-ing form
I could be ramparting you could be ramparting he could be ramparting we could be ramparting you could be ramparting they could be ramparting
Perfect
I could have ramparted you could have ramparted he could have ramparted we could have ramparted you could have ramparted they could have ramparted
V-ing perfect
I could have been ramparting you could have been ramparting he could have been ramparting we could have been ramparting you could have been ramparting they could have been ramparting
Negation
Simple form
I could not rampart you could not rampart he could not rampart we could not rampart you could not rampart they could not rampart
V-ing form
I could not be ramparting you could not be ramparting he could not be ramparting we could not be ramparting you could not be ramparting they could not be ramparting
Perfect
I could not have ramparted you could not have ramparted he could not have ramparted we could not have ramparted you could not have ramparted they could not have ramparted
V-ing perfect
I could not have been ramparting you could not have been ramparting he could not have been ramparting we could not have been ramparting you could not have been ramparting they could not have been ramparting
Interrogative form
Simple form
could I rampart? could you rampart? could he rampart? could we rampart? could you rampart? could they rampart?
V-ing form
could I be ramparting? could you be ramparting? could he be ramparting? could we be ramparting? could you be ramparting? could they be ramparting?
Perfect
could I have ramparted? could you have ramparted? could he have ramparted? could we have ramparted? could you have ramparted? could they have ramparted?
V-ing perfect
could I have been ramparting? could you have been ramparting? could he have been ramparting? could we have been ramparting? could you have been ramparting? could they have been ramparting?
Interro-negative form
Simple form
could I not rampart? could you not rampart? could he not rampart? could we not rampart? could you not rampart? could they not rampart?
V-ing form
could I not be ramparting? could you not be ramparting? could he not be ramparting? could we not be ramparting? could you not be ramparting? could they not be ramparting?
Perfect
could I not have ramparted? could you not have ramparted? could he not have ramparted? could we not have ramparted? could you not have ramparted? could they not have ramparted?
V-ing perfect
could I not have been ramparting? could you not have been ramparting? could he not have been ramparting? could we not have been ramparting? could you not have been ramparting? could they not have been ramparting?