I could trademark you could trademark she could trademark we could trademark you could trademark they could trademark
V-ing form
I could be trademarking you could be trademarking she could be trademarking we could be trademarking you could be trademarking they could be trademarking
Perfect
I could have trademarked you could have trademarked she could have trademarked we could have trademarked you could have trademarked they could have trademarked
V-ing perfect
I could have been trademarking you could have been trademarking she could have been trademarking we could have been trademarking you could have been trademarking they could have been trademarking
Negation
Simple form
I couldn't trademark you couldn't trademark she couldn't trademark we couldn't trademark you couldn't trademark they couldn't trademark
V-ing form
I couldn't be trademarking you couldn't be trademarking she couldn't be trademarking we couldn't be trademarking you couldn't be trademarking they couldn't be trademarking
Perfect
I couldn't have trademarked you couldn't have trademarked she couldn't have trademarked we couldn't have trademarked you couldn't have trademarked they couldn't have trademarked
V-ing perfect
I couldn't have been trademarking you couldn't have been trademarking she couldn't have been trademarking we couldn't have been trademarking you couldn't have been trademarking they couldn't have been trademarking
Interrogative form
Simple form
could I trademark? could you trademark? could she trademark? could we trademark? could you trademark? could they trademark?
V-ing form
could I be trademarking? could you be trademarking? could she be trademarking? could we be trademarking? could you be trademarking? could they be trademarking?
Perfect
could I have trademarked? could you have trademarked? could she have trademarked? could we have trademarked? could you have trademarked? could they have trademarked?
V-ing perfect
could I have been trademarking? could you have been trademarking? could she have been trademarking? could we have been trademarking? could you have been trademarking? could they have been trademarking?
Interro-negative form
Simple form
couldn't I trademark? couldn't you trademark? couldn't she trademark? couldn't we trademark? couldn't you trademark? couldn't they trademark?
V-ing form
couldn't I be trademarking? couldn't you be trademarking? couldn't she be trademarking? couldn't we be trademarking? couldn't you be trademarking? couldn't they be trademarking?
Perfect
couldn't I have trademarked? couldn't you have trademarked? couldn't she have trademarked? couldn't we have trademarked? couldn't you have trademarked? couldn't they have trademarked?
V-ing perfect
couldn't I have been trademarking? couldn't you have been trademarking? couldn't she have been trademarking? couldn't we have been trademarking? couldn't you have been trademarking? couldn't they have been trademarking?