I could bulwark you could bulwark she could bulwark we could bulwark you could bulwark they could bulwark
V-ing form
I could be bulwarking you could be bulwarking she could be bulwarking we could be bulwarking you could be bulwarking they could be bulwarking
Perfect
I could have bulwarked you could have bulwarked she could have bulwarked we could have bulwarked you could have bulwarked they could have bulwarked
V-ing perfect
I could have been bulwarking you could have been bulwarking she could have been bulwarking we could have been bulwarking you could have been bulwarking they could have been bulwarking
Negation
Simple form
I could not bulwark you could not bulwark she could not bulwark we could not bulwark you could not bulwark they could not bulwark
V-ing form
I could not be bulwarking you could not be bulwarking she could not be bulwarking we could not be bulwarking you could not be bulwarking they could not be bulwarking
Perfect
I could not have bulwarked you could not have bulwarked she could not have bulwarked we could not have bulwarked you could not have bulwarked they could not have bulwarked
V-ing perfect
I could not have been bulwarking you could not have been bulwarking she could not have been bulwarking we could not have been bulwarking you could not have been bulwarking they could not have been bulwarking
Interrogative form
Simple form
could I bulwark? could you bulwark? could she bulwark? could we bulwark? could you bulwark? could they bulwark?
V-ing form
could I be bulwarking? could you be bulwarking? could she be bulwarking? could we be bulwarking? could you be bulwarking? could they be bulwarking?
Perfect
could I have bulwarked? could you have bulwarked? could she have bulwarked? could we have bulwarked? could you have bulwarked? could they have bulwarked?
V-ing perfect
could I have been bulwarking? could you have been bulwarking? could she have been bulwarking? could we have been bulwarking? could you have been bulwarking? could they have been bulwarking?
Interro-negative form
Simple form
could I not bulwark? could you not bulwark? could she not bulwark? could we not bulwark? could you not bulwark? could they not bulwark?
V-ing form
could I not be bulwarking? could you not be bulwarking? could she not be bulwarking? could we not be bulwarking? could you not be bulwarking? could they not be bulwarking?
Perfect
could I not have bulwarked? could you not have bulwarked? could she not have bulwarked? could we not have bulwarked? could you not have bulwarked? could they not have bulwarked?
V-ing perfect
could I not have been bulwarking? could you not have been bulwarking? could she not have been bulwarking? could we not have been bulwarking? could you not have been bulwarking? could they not have been bulwarking?