English verb conjugation
MUST FORBID

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

Affirmation

Simple form	V-ing form
I must forbid you must forbid she must forbid we must forbid you must forbid they must forbid	I must be forbidding you must be forbidding she 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 she 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 she 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 mustn't forbid you mustn't forbid she mustn't forbid we mustn't forbid you mustn't forbid they mustn't forbid	I mustn't be forbidding you mustn't be forbidding she mustn't be forbidding we mustn't be forbidding you mustn't be forbidding they mustn't be forbidding
Perfect	V-ing perfect
I mustn't have forbid, forbidden you mustn't have forbid, forbidden she mustn't have forbid, forbidden we mustn't have forbid, forbidden you mustn't have forbid, forbidden they mustn't have forbid, forbidden	I mustn't have been forbidding you mustn't have been forbidding she mustn't have been forbidding we mustn't have been forbidding you mustn't have been forbidding they mustn't have been forbidding

Interrogative form

Simple form	V-ing form
must I forbid? must you forbid? must she forbid? must we forbid? must you forbid? must they forbid?	must I be forbidding? must you be forbidding? must she 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 she 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 she 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
mustn't I forbid? mustn't you forbid? mustn't she forbid? mustn't we forbid? mustn't you forbid? mustn't they forbid?	mustn't I be forbidding? mustn't you be forbidding? mustn't she be forbidding? mustn't we be forbidding? mustn't you be forbidding? mustn't they be forbidding?
Perfect	V-ing perfect
mustn't I have forbid, forbidden? mustn't you have forbid, forbidden? mustn't she have forbid, forbidden? mustn't we have forbid, forbidden? mustn't you have forbid, forbidden? mustn't they have forbid, forbidden?	mustn't I have been forbidding? mustn't you have been forbidding? mustn't she have been forbidding? mustn't we have been forbidding? mustn't you have been forbidding? mustn't they have been forbidding?