English verb conjugation
MUST DEMARK

Regular verb: demark - demarked - demarked

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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