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 can't demark you can't demark he can't demark we can't demark you can't demark they can't demark	I can't be demarking you can't be demarking he can't be demarking we can't be demarking you can't be demarking they can't be demarking
Perfect	V-ing perfect
I can't have demarked you can't have demarked he can't have demarked we can't have demarked you can't have demarked they can't have demarked	I can't have been demarking you can't have been demarking he can't have been demarking we can't have been demarking you can't have been demarking they can't 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't I demark? can't you demark? can't he demark? can't we demark? can't you demark? can't they demark?	can't I be demarking? can't you be demarking? can't he be demarking? can't we be demarking? can't you be demarking? can't they be demarking?
Perfect	V-ing perfect
can't I have demarked? can't you have demarked? can't he have demarked? can't we have demarked? can't you have demarked? can't they have demarked?	can't I have been demarking? can't you have been demarking? can't he have been demarking? can't we have been demarking? can't you have been demarking? can't they have been demarking?