I could trademark you could trademark he could trademark we could trademark you could trademark they could trademark
V-ing form
I could be trademarking you could be trademarking he could be trademarking we could be trademarking you could be trademarking they could be trademarking
Perfect
I could have trademarked you could have trademarked he 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 he could have been trademarking we could have been trademarking you could have been trademarking they could have been trademarking
Negation
Simple form
I could not trademark you could not trademark he could not trademark we could not trademark you could not trademark they could not trademark
V-ing form
I could not be trademarking you could not be trademarking he could not be trademarking we could not be trademarking you could not be trademarking they could not be trademarking
Perfect
I could not have trademarked you could not have trademarked he could not have trademarked we could not have trademarked you could not have trademarked they could not have trademarked
V-ing perfect
I could not have been trademarking you could not have been trademarking he could not have been trademarking we could not have been trademarking you could not have been trademarking they could not have been trademarking
Interrogative form
Simple form
could I trademark? could you trademark? could he trademark? could we trademark? could you trademark? could they trademark?
V-ing form
could I be trademarking? could you be trademarking? could he be trademarking? could we be trademarking? could you be trademarking? could they be trademarking?
Perfect
could I have trademarked? could you have trademarked? could he 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 he have been trademarking? could we have been trademarking? could you have been trademarking? could they have been trademarking?
Interro-negative form
Simple form
could I not trademark? could you not trademark? could he not trademark? could we not trademark? could you not trademark? could they not trademark?
V-ing form
could I not be trademarking? could you not be trademarking? could he not be trademarking? could we not be trademarking? could you not be trademarking? could they not be trademarking?
Perfect
could I not have trademarked? could you not have trademarked? could he not have trademarked? could we not have trademarked? could you not have trademarked? could they not have trademarked?
V-ing perfect
could I not have been trademarking? could you not have been trademarking? could he not have been trademarking? could we not have been trademarking? could you not have been trademarking? could they not have been trademarking?