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 couldn't bulwark you couldn't bulwark she couldn't bulwark we couldn't bulwark you couldn't bulwark they couldn't bulwark
V-ing form
I couldn't be bulwarking you couldn't be bulwarking she couldn't be bulwarking we couldn't be bulwarking you couldn't be bulwarking they couldn't be bulwarking
Perfect
I couldn't have bulwarked you couldn't have bulwarked she couldn't have bulwarked we couldn't have bulwarked you couldn't have bulwarked they couldn't have bulwarked
V-ing perfect
I couldn't have been bulwarking you couldn't have been bulwarking she couldn't have been bulwarking we couldn't have been bulwarking you couldn't have been bulwarking they couldn't 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
couldn't I bulwark? couldn't you bulwark? couldn't she bulwark? couldn't we bulwark? couldn't you bulwark? couldn't they bulwark?
V-ing form
couldn't I be bulwarking? couldn't you be bulwarking? couldn't she be bulwarking? couldn't we be bulwarking? couldn't you be bulwarking? couldn't they be bulwarking?
Perfect
couldn't I have bulwarked? couldn't you have bulwarked? couldn't she have bulwarked? couldn't we have bulwarked? couldn't you have bulwarked? couldn't they have bulwarked?
V-ing perfect
couldn't I have been bulwarking? couldn't you have been bulwarking? couldn't she have been bulwarking? couldn't we have been bulwarking? couldn't you have been bulwarking? couldn't they have been bulwarking?