English verb conjugation
CAN DEMARK

Regular verb: demark - demarked - demarked

Affirmation

Simple form	V-ing form
I can demark you can demark he can demark we can demark you can demark they can demark	I can be demarking you can be demarking he can be demarking we can be demarking you can be demarking they can be demarking
Perfect	V-ing perfect
I can have demarked you can have demarked he can have demarked we can have demarked you can have demarked they can have demarked	I can have been demarking you can have been demarking he can have been demarking we can have been demarking you can have been demarking they can have been demarking

Negation

Simple form	V-ing form
I cannot demark you cannot demark he cannot demark we cannot demark you cannot demark they cannot demark	I cannot be demarking you cannot be demarking he cannot be demarking we cannot be demarking you cannot be demarking they cannot be demarking
Perfect	V-ing perfect
I cannot have demarked you cannot have demarked he cannot have demarked we cannot have demarked you cannot have demarked they cannot have demarked	I cannot have been demarking you cannot have been demarking he cannot have been demarking we cannot have been demarking you cannot have been demarking they cannot have been demarking

Interrogative form

Simple form	V-ing form
can I demark? can you demark? can he demark? can we demark? can you demark? can they demark?	can I be demarking? can you be demarking? can he be demarking? can we be demarking? can you be demarking? can they be demarking?
Perfect	V-ing perfect
can I have demarked? can you have demarked? can he have demarked? can we have demarked? can you have demarked? can they have demarked?	can I have been demarking? can you have been demarking? can he have been demarking? can we have been demarking? can you have been demarking? can they have been demarking?

Interro-negative form

Simple form	V-ing form
can I not demark? can you not demark? can he not demark? can we not demark? can you not demark? can they not demark?	can I not be demarking? can you not be demarking? can he not be demarking? can we not be demarking? can you not be demarking? can they not be demarking?
Perfect	V-ing perfect
can I not have demarked? can you not have demarked? can he not have demarked? can we not have demarked? can you not have demarked? can they not have demarked?	can I not have been demarking? can you not have been demarking? can he not have been demarking? can we not have been demarking? can you not have been demarking? can they not have been demarking?