English verb conjugation
MUST CHARM

Regular verb: charm - charmed - charmed

Affirmation

Simple form	V-ing form
I must charm you must charm he must charm we must charm you must charm they must charm	I must be charming you must be charming he must be charming we must be charming you must be charming they must be charming
Perfect	V-ing perfect
I must have charmed you must have charmed he must have charmed we must have charmed you must have charmed they must have charmed	I must have been charming you must have been charming he must have been charming we must have been charming you must have been charming they must have been charming

Negation

Simple form	V-ing form
I must not charm you must not charm he must not charm we must not charm you must not charm they must not charm	I must not be charming you must not be charming he must not be charming we must not be charming you must not be charming they must not be charming
Perfect	V-ing perfect
I must not have charmed you must not have charmed he must not have charmed we must not have charmed you must not have charmed they must not have charmed	I must not have been charming you must not have been charming he must not have been charming we must not have been charming you must not have been charming they must not have been charming

Interrogative form

Simple form	V-ing form
must I charm? must you charm? must he charm? must we charm? must you charm? must they charm?	must I be charming? must you be charming? must he be charming? must we be charming? must you be charming? must they be charming?
Perfect	V-ing perfect
must I have charmed? must you have charmed? must he have charmed? must we have charmed? must you have charmed? must they have charmed?	must I have been charming? must you have been charming? must he have been charming? must we have been charming? must you have been charming? must they have been charming?

Interro-negative form

Simple form	V-ing form
must I not charm? must you not charm? must he not charm? must we not charm? must you not charm? must they not charm?	must I not be charming? must you not be charming? must he not be charming? must we not be charming? must you not be charming? must they not be charming?
Perfect	V-ing perfect
must I not have charmed? must you not have charmed? must he not have charmed? must we not have charmed? must you not have charmed? must they not have charmed?	must I not have been charming? must you not have been charming? must he not have been charming? must we not have been charming? must you not have been charming? must they not have been charming?