English verb conjugation
MUST FORBID

Irregular verb: forbid - forbid, forbade - forbid, forbidden

Affirmation

Simple form	V-ing form
I must forbid you must forbid he must forbid we must forbid you must forbid they must forbid	I must be forbidding you must be forbidding he must be forbidding we must be forbidding you must be forbidding they must be forbidding
Perfect	V-ing perfect
I must have forbid, forbidden you must have forbid, forbidden he must have forbid, forbidden we must have forbid, forbidden you must have forbid, forbidden they must have forbid, forbidden	I must have been forbidding you must have been forbidding he must have been forbidding we must have been forbidding you must have been forbidding they must have been forbidding

Negation

Simple form	V-ing form
I must not forbid you must not forbid he must not forbid we must not forbid you must not forbid they must not forbid	I must not be forbidding you must not be forbidding he must not be forbidding we must not be forbidding you must not be forbidding they must not be forbidding
Perfect	V-ing perfect
I must not have forbid, forbidden you must not have forbid, forbidden he must not have forbid, forbidden we must not have forbid, forbidden you must not have forbid, forbidden they must not have forbid, forbidden	I must not have been forbidding you must not have been forbidding he must not have been forbidding we must not have been forbidding you must not have been forbidding they must not have been forbidding

Interrogative form

Simple form	V-ing form
must I forbid? must you forbid? must he forbid? must we forbid? must you forbid? must they forbid?	must I be forbidding? must you be forbidding? must he be forbidding? must we be forbidding? must you be forbidding? must they be forbidding?
Perfect	V-ing perfect
must I have forbid, forbidden? must you have forbid, forbidden? must he have forbid, forbidden? must we have forbid, forbidden? must you have forbid, forbidden? must they have forbid, forbidden?	must I have been forbidding? must you have been forbidding? must he have been forbidding? must we have been forbidding? must you have been forbidding? must they have been forbidding?

Interro-negative form

Simple form	V-ing form
must I not forbid? must you not forbid? must he not forbid? must we not forbid? must you not forbid? must they not forbid?	must I not be forbidding? must you not be forbidding? must he not be forbidding? must we not be forbidding? must you not be forbidding? must they not be forbidding?
Perfect	V-ing perfect
must I not have forbid, forbidden? must you not have forbid, forbidden? must he not have forbid, forbidden? must we not have forbid, forbidden? must you not have forbid, forbidden? must they not have forbid, forbidden?	must I not have been forbidding? must you not have been forbidding? must he not have been forbidding? must we not have been forbidding? must you not have been forbidding? must they not have been forbidding?